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DESIGN OF NEW TEST FACILITY FOR MICRO-TURBO-MACHINERY
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作者 夏晨 黄国平 陈杰 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2010年第4期288-298,共11页
Micro-turbine engine has no enough space for measuring impeller characteristics,so the design and the construction of a new test facility of micro-turbo-machinery are presented for micro-centrifugal compressors and ra... Micro-turbine engine has no enough space for measuring impeller characteristics,so the design and the construction of a new test facility of micro-turbo-machinery are presented for micro-centrifugal compressors and radial turbines.The facility is used for the full speed compressor test and the long duration hot turbine test.To rapidly adjust the testing condition,all regulations of the operating state are automatically completed by the control system.The facility is also used for testing the impeller performance with a series of diameter from 55 mm to 180 mm as a result of the modular design.A thermal protection system is designed to avoid the heat distortion caused by the high turbine inlet temperature over 1 100 K and provide a proper experimental environment for the electronic components.A photoelectric torque transducer with the accuracy of 1% is designed to measure the torque of rigid shaft at a high speed of 125 000 r/min.The designing techniques for micro-turbo-machineries are verified by the impeller testing of the facility. 展开更多
关键词 engines turbo-machinery test facility PERFORMANCE
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The Test Facility for the EAST Superconducting Magnets 被引量:1
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作者 武玉 翁佩德 《Plasma Science and Technology》 SCIE EI CAS CSCD 2005年第4期2919-2922,共4页
A large facility for testing superconducting magnets has been in operation at the Institute of Plasma Physics of the Chinese Academy of Sciences since the completion of its construction that began in 1999. A helium re... A large facility for testing superconducting magnets has been in operation at the Institute of Plasma Physics of the Chinese Academy of Sciences since the completion of its construction that began in 1999. A helium refrigerator is used to cool the magnets and liquefy helium which can provide 3.8 K-4.5 K, 1.8 bar-5 bar, 20g/s-40g/s supercritical helium for the coils or a 150 L/h liquefying helium capacity. Other major parts include a large vacuum vessel (3.5 m in diameter and 6.1 m in height) with a liquid nitrogen temperature shield, two pairs of current lead, three sets of 14.5 kA-50 kA power supply with a fast dump quench protection circuitry, a data acquisition and control system, a vacuum pumping system, and a gas tightness inspecting devise. The primary goal of the test facility is to test the EAST TF and PF magnets in relation to their electromagnetic, stability, thermal, hydraulic, and mechanical performance. The construction of this facility was completed in 2002, followed by a series of systematic coil testing. By now ten TF magnets, a central solenoid model coil, a central solenoid prototype coil, and a model coil of the PF large coil have been successfully tested in the facility. 展开更多
关键词 superconducting magnet test facility cable-in-conduit-conductor (CICC)
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μ-Synthesis control with reference model for aeropropulsion system test facility under dynamic coupling and uncertainty
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作者 Jiashuai LIU Xi WANG +4 位作者 Xi LIU Meiyin ZHU Xitong PEI Song ZHANG Zhihong DAN 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2023年第10期246-261,共16页
Due to the dynamic coupling and multi-source uncertainties,it is difficult to accurately control the pressure and temperature of the Aeropropulsion System Test Facility(ASTF)in the presence of rapid command and large ... Due to the dynamic coupling and multi-source uncertainties,it is difficult to accurately control the pressure and temperature of the Aeropropulsion System Test Facility(ASTF)in the presence of rapid command and large disturbance.This paper presents the design ofμ-synthesis control to solve the problem.By incorporating the pressure ratio into the linear equation of the control valve,the modeling error of ASTF in the low frequency range is effectively reduced.Then,an uncertain model is established by considering various factors,including parameter variations,modeling error in the low frequency range,unmodeled dynamics,and changes in the working point.To address the dynamic coupling,a diagonal reference model with desired performance is incorporated intoμ-synthesis.Furthermore,all weighting functions are designed according to the performance requirements.Finally,theμ-controller is obtained by using the standardμ-synthesis method.Simulation results indicate that theμ-controller decouples the pressure and temperature dynamics of ASTF.Compared with the multivariable PI controller,integral-μcontroller,and double integral-μcontroller,the proposedμ-controller can achieve higher transient accuracy and better disturbance rejection.Moreover,the robustness of theμ-controller is demonstrated by Monte Carlo simulations. 展开更多
关键词 Aeropropulsion System test facility(ASTF) DECOUPLING ROBUSTNESS μ-Synthesis UNCERTAINTY
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Design studies on the ERL-FEL test facility at IHEP, Beijing 被引量:1
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作者 王书鸿 王九庆 +13 位作者 陈森玉 池云龙 王光伟 曹建社 刘圣广 高杰 翟纪元 刘渭滨 崔小昊 徐金强 周祖圣 李小平 陆辉华 肖琼 《Chinese Physics C》 SCIE CAS CSCD 2012年第5期469-474,共6页
A proposed compact ERL test facility at IHEP, Beijing, is presented in this paper, and includes the design parameters, the essential lattice, and the key components features, such as the photocathode DC gun and the CW... A proposed compact ERL test facility at IHEP, Beijing, is presented in this paper, and includes the design parameters, the essential lattice, and the key components features, such as the photocathode DC gun and the CW superconducting accelerating structures. Some important beam physics issues such as the space charge effect, the coherent synchrotron radiation (CSR) effect and the beam break-up (BBU) effect are briefly described with the simulation results. 展开更多
关键词 ERL test facility DC gun CW superconducting accelerating structure CSR BBU
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I MWth Test Facilities for Circulating Fluidized Bed Combustion 被引量:1
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作者 高洪培 徐正泉 孙献斌 《Electricity》 2002年第4期27-31,共5页
This paper presents the technical parameters and features of 1 MWth test facilities for circulating fluidized bed combustion (CFBC) at Thermal Power Research Institute (TPRI) of State Power Corporation (SP), introduce... This paper presents the technical parameters and features of 1 MWth test facilities for circulating fluidized bed combustion (CFBC) at Thermal Power Research Institute (TPRI) of State Power Corporation (SP), introduces the test items that can be proceeded and trial combustion projects completed. The development status of CFBC technologies abroad and the level of China in this field are also introduced in the paper. 展开更多
关键词 circulating fluidized bed (CFB) COMBUSTION test facilities
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Simplified Removable Ground Test-Bed for Testing Turbofan Engine
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作者 李文峰 王永生 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2003年第3期138-141,共4页
A new simplified removable ground test-bed was designed for testing a certainturbofan engine. The facilities are 5.5 m long, 1.5 m wide, 2.2 m high and not more than 4. 5 t ofits empty weight. There are four rubber wh... A new simplified removable ground test-bed was designed for testing a certainturbofan engine. The facilities are 5.5 m long, 1.5 m wide, 2.2 m high and not more than 4. 5 t ofits empty weight. There are four rubber wheels that could be towed. There is an independentelectrical measurement and control system to test the rotational speed of rotors, the gas pressureof the compressor, the exhaust gas temperature, etc. Cooperated with the oil truck and the electricpower supply truck, the turbofan engine could be preserved on the ground and started to the idlingregime. While running, the parameter of the engine could be recorded, disposed and displayed. Inaddition, the facilities were successfully applied to the plateau experiment in order to researchhow the atmosphere pressure affects the start of engines. Some data are given in the paper. 展开更多
关键词 turbofan engine simplified type REMOVABLE test-BED ground test facilities
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Particle characteristics and rheological constitutive relations of high concentration red mud 被引量:10
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作者 WANG Xing QU Yuan-yuan +3 位作者 HU Wei-wei CHEN Jie ZHAO Xue-yi WU Miao 《Journal of China University of Mining and Technology》 EI 2008年第2期266-270,共5页
Red mud has relatively small solid particles (d50= 13.02 μm) and will flow in paste form under high pressure during pipeline transport. Red mud belongs to a two-phase flow of materials with high viscosity and a hig... Red mud has relatively small solid particles (d50= 13.02 μm) and will flow in paste form under high pressure during pipeline transport. Red mud belongs to a two-phase flow of materials with high viscosity and a high concentration of non-sedimentation, homogeneous solid-liquids. It is difficult to test its rheological properties under atmospheric pressure. Measurements such as rotational viscometry can not reflect the real state of the material when it is flowing in a pipe. Tested rheological parameters are somewhat higher than the actual values. In our investigation, grain shape, distinctive modality and grain size distribution of red mud were tested. Based on the principle of tube measurement, rheological experiments on red mud at different concentrations were carried out by using our independently developed tube-type pressure theology test facility, and obtained constitutive equations. We conclude that red mud behaves as non-Newtonian pseudo-plastic fluid in pipe flows. Its consistency and power-law indices vary considerably with different concentrations. 展开更多
关键词 high concentration non-Newtonian fluid rheological constitutive relations red mud tube-pipe flow method tube-type pressure rheology test facility
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A numerical optimization of high altitude testing facility for wind tunnel experiments 被引量:9
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作者 J.Bruce Ralphin Rose G.R.Jinu C.J.Brindha 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2015年第3期636-648,共13页
Abstract High altitude test facilities are required to test the high area ratio nozzles operating at the upper stages of rocket in the nozzle full flow conditions. It is typically achieved by creating the ambient pres... Abstract High altitude test facilities are required to test the high area ratio nozzles operating at the upper stages of rocket in the nozzle full flow conditions. It is typically achieved by creating the ambient pressure equal or less than the nozzle exit pressure. On average, air/GN2 is used as active gas for ejector system that is stored in the high pressure cylinders. The wind tunnel facilities are used for conducting aerodynamic simulation experiments at/under various flow velocities and operating conditions. However, constructing both of these facilities require more laboratory space and expensive instruments. Because of this demerit, a novel scheme is implemented for conducting wind tunnel experiments by using the existing infrastructure available in the high altitude testing (HAT) facility. This article presents the details about the methods implemented for suitably modifying the sub-scale HAT facility to conduct wind tunnel experiments. Hence, the design of nozzle for required area ratio A/A*, realization of test section and the optimized configuration are focused in the present analysis. Specific insights into various rocket models including high thrust cryogenic engines and their holding mechanisms to conduct wind tunnel experiments in the HAT facility are analyzed. A detailed CFD analysis is done to propose this conversion without affecting the existing functional requirements of the HAT facility. 展开更多
关键词 CFD Enclosed free-jet section Ground testing High altitude testing (HAT)facility OPTIMIZATION
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A review of modeling,simulation,and control technologies of altitude ground test facilities for control application 被引量:1
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作者 Xitong PEI Xi WANG +6 位作者 Jiashuai LIU Meiyin ZHU Zhihong DAN Ai HE Keqiang MIAO Louyue ZHANG Zheng XU 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2023年第9期38-62,共25页
As the pivotal test equipment of aero-engines design,finalization,improvement,modification,etc.,the Altitude Ground Test Facilities(AGTF)plays an important role in the research and development of the aero-engines.With... As the pivotal test equipment of aero-engines design,finalization,improvement,modification,etc.,the Altitude Ground Test Facilities(AGTF)plays an important role in the research and development of the aero-engines.With the rapid development of advanced high-performance aeroengine,the increasing demand of high-altitude simulation test is driving AGTF to improve its test ability and level of automation and intelligence.The modeling method,simulation tool,and control technology are the key factors to support the improvement of the AGTF control system.The main purpose of this paper is to provide an overview of modeling methods,simulation tools,and control technologies in AGTF control system for future research.First,it reviews the evolution of AGTF in the world,from the early formative stage to integration stage.Then,the mathematical modeling method of AGTF for control application is overviewed.Furthermore,the simulation tools used in the AGTF control system are overviewed from numerical simulation to hardware-in-loop simulation and further to semi-physical simulation.Meanwhile,the control technologies used in the AGTF control system are summarized from single-variable control to multivariable integrated control,and from classical control theory to modern control theory.Finally,recommendations for future research are outlined.Therefore,this review article provides extensive literature information for the modeling,simulation,and control design of AGTF for control application. 展开更多
关键词 Altitude ground test facilities Control system Modeling and simulation Robust control Temperature and pressure control
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Real-time modular dynamic modeling for compression system of altitude ground test facilities
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作者 Yang SU Xuejiang CHEN +2 位作者 Xin WANG Xiaodong LI Xiaoming LIU 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2023年第5期202-211,共10页
Modeling of a centrifugal compressor is of great significance to surge characteristics and fluid dynamics in the Altitude Ground Test Facilities(AGTF).Real-time Modular Dynamic System Greitzer(MDSG)modeling for dynami... Modeling of a centrifugal compressor is of great significance to surge characteristics and fluid dynamics in the Altitude Ground Test Facilities(AGTF).Real-time Modular Dynamic System Greitzer(MDSG)modeling for dynamic response and simulation of the compression system is introduced.The centrifugal compressor,pipeline network,and valve are divided into pressure output type and mass flow output type for module modeling,and the two types of components alternate when the system is established.The pressure loss and thermodynamics of the system are considered.An air supply compression system of AGTF is modeled and simulated by the MDSG model.The simulation results of mass flow,pressure,and temperature are compared with the experimental results,and the error is less than 5%,which demonstrates the reliability,practicability,and universality of the MDSG model. 展开更多
关键词 Altitude Ground test Facilities(AGTF) Compression modeling Dynamic simulation Real-time modelling Modular Dynamic System Greitzer(MDSG)modeling
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2 K superfluid helium cryogenic vertical test system for superconducting cavity of ADS Injector I 被引量:3
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作者 Rui Ge Liangrui Sun +13 位作者 Miaofu Xu Rui Ye Xiangzhen Zhang Minjing Sang Ruixiong Han Zhuo Zhang Jiehao Zhang Lin Bian Mei Li Changcheng Ma Tongxian Zhao Yongcheng Jiang Zhengze Chang Shaopeng Li 《Radiation Detection Technology and Methods》 CSCD 2020年第2期131-138,共8页
Purpose The accelerator-driven subcritical system(ADS)is the internationally recognized key technology of nuclear waste problem treatment,of which superconducting proton linac is an important part.With the support of ... Purpose The accelerator-driven subcritical system(ADS)is the internationally recognized key technology of nuclear waste problem treatment,of which superconducting proton linac is an important part.With the support of the strategic science and technology pilot project of the Chinese Academy of Sciences,the Institute of High Energy Physics of the Chinese Academy of Sciences took the lead in the research of 325 MHz superconducting proton linac,which is called ADS Injector I.The superconducting accelerator part of ADS Injector I mainly consists of 14 spoke-type superconducting cavities withβ0.12.At the same time,the research work of various cavities with differentβvalues and different frequencies is also carried out to lay the technical and technological foundation for ADS main accelerator.The only way to determine whether the superconducting cavity can reach the design target and whether it can be installed into the cryostat is the vertical test at cryogenic.As the only way to test the microwave performance of the superconducting cavity at low temperature,the vertical test can accurately test the acceleration gradient Eacc and the corresponding quality factor Q0 of the superconducting cavity.The design and construction of the superconducting cavity vertical test facility is based on the practical needs of the pilot project and the long-term development of the superconducting accelerator.Methods This paper mainly introduces the design and construction of the cryogenic vertical test system for the superconducting cavity of ADS Injector I,including the system scheme design,process design,heat load analysis,2 K superfluid helium obtaining method,system commissioning and operation,etc.Results and Conclusion The static heat leakage at 2 K of the 2 K superfluid helium vertical test system of ADS Injector I is 1.624W,which has reached the international advanced level.The 2 K superfluid helium vertical test system of ADS Injector I after constructed not only meets the test requirements of ADS pilot project,but also conducts 4 K and 2 K vertical tests for other different types of superconducting cavities and relevant cryogenic experiments. 展开更多
关键词 Superconducting cavity Superfluid helium Vertical test facility 2 K cryogenic system
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A Modeling Language Based on UML for Modeling Simulation Testing System of Avionic Software 被引量:2
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作者 WANG Lize LIU Bin LU Minyan 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2011年第2期181-194,共14页
With direct expression of individual application domain patterns and ideas,domain-specific modeling language(DSML) is more and more frequently used to build models instead of using a combination of one or more gener... With direct expression of individual application domain patterns and ideas,domain-specific modeling language(DSML) is more and more frequently used to build models instead of using a combination of one or more general constructs.Based on the profile mechanism of unified modeling language(UML) 2.2,a kind of DSML is presented to model simulation testing systems of avionic software(STSAS).To define the syntax,semantics and notions of the DSML,the domain model of the STSAS from which we generalize the domain concepts and relationships among these concepts is given,and then,the domain model is mapped into a UML meta-model,named UML-STSAS profile.Assuming a flight control system(FCS) as system under test(SUT),we design the relevant STSAS.The results indicate that extending UML to the simulation testing domain can effectively and precisely model STSAS. 展开更多
关键词 AVIONICS HARDWARE-IN-THE-LOOP test facilities META-MODEL UML profile domain-specific modeling language abstract state machine
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THE TENSILE STRENGTH OF TEST WATER IN DIFFERENT CAVITATION TEST FACILITIES
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作者 Yang Zhi-ming Wuhan University of Hydraulic and Electric Engineering,Wuhan 430072,P.R.China 《Journal of Hydrodynamics》 SCIE EI CSCD 1991年第4期55-60,共6页
Since 1983 it has been reported many times that the tensile strength of a liquid has a noticeable influence on incipient cavitation test[1,2,3].In this paper some results indicate the characters of tensile strength of... Since 1983 it has been reported many times that the tensile strength of a liquid has a noticeable influence on incipient cavitation test[1,2,3].In this paper some results indicate the characters of tensile strength of test wa- ter in different cavitation test facilities for example;characters in normal cavitation tunnel without free surface and in depression tank with free surface respectively.For getting a comparable and stable test result of cavitation inception it is important to know the tensile strength of test water and to keep it stable. 展开更多
关键词 test THE TENSILE STRENGTH OF test WATER IN DIFFERENT CAVITATION test FACILITIES der
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Model optimization method and connected-pipe experiment of a liquid fuel ramjet engine 被引量:2
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作者 MA Qian-rong GUO Xin +1 位作者 WU Hu CHOU Qian 《航空动力学报》 EI CAS CSCD 北大核心 2013年第6期1277-1285,共9页
The optimization method of a mathematical model and connected-pipe experimental technique for a test in altitude test facility (ATF) of a liquid fuel ramjet engine was researched.The optimization of the simple mathema... The optimization method of a mathematical model and connected-pipe experimental technique for a test in altitude test facility (ATF) of a liquid fuel ramjet engine was researched.The optimization of the simple mathematical model was divided into two steps.Firstly,using the test engine's geometry configuration size data,a preliminary adjustment was done.Secondly,using experimental test data,the components' experiential coefficients were modified appropriately.Emphasis was laid on the simulation technique of flight condition and parameters measurement method.The experimental technique was applied to a ramjet ATF test successfully.The comparison results show that the optimized-model has higher precision and the nozzle gross thrust difference drops from 12% to about 4%. 展开更多
关键词 ramjet engine model optimization altitude test facility(ATF) connected-pipe experiment simulation technique
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EXPERIMENTS OF HYDRODYNAMICS AND STABILITY OF IMMERSED TUBE TUNNEL ON TRANSPORTATION AND IMMERSING 被引量:9
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作者 Zhan, D.X. Wang, X.Q. 《Journal of Hydrodynamics》 SCIE EI CSCD 2001年第2期121-126,共6页
Effects of environment conditions, such as current, wave etc., are more important for immersed tube tunnel's transportation and immersing. The hydrodynamics and stability of immersed tube tunnel during its towing ... Effects of environment conditions, such as current, wave etc., are more important for immersed tube tunnel's transportation and immersing. The hydrodynamics and stability of immersed tube tunnel during its towing and immersing are interested for departments of design and construction. A serial model tests are made in towing tank and water channel for Nanjing immersed tube tunnel, and the first immersed tunnel has been designed in Yangtzi River in China. The hydrodynamic forces and rope tensions of the tunnel are measured with strain balances when it is towed by ship and immersed by winches for a different current velocity and wave height. In addition, the stability of tunnel for a different ballast water is tested and discussed. 展开更多
关键词 HYDRODYNAMICS STABILITY Tensile testing test facilities
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Modified robust optimal adaptive control for flight environment simulation system with heat transfer uncertainty 被引量:2
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作者 Meiyin ZHU Xi WANG +7 位作者 Xitong PEI Song ZHANG Zhihong DAN Nannan GU Shubo YANG Keqiang MIAO Huairong CHEN Jiashuai LIU 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2021年第2期420-431,共12页
To solve the rapid transient control problem of Flight Environment Simulation System(FESS) of Altitude Ground Test Facilities(AGTF) with large heat transfer uncertainty and disturbance, a new adaptive control structur... To solve the rapid transient control problem of Flight Environment Simulation System(FESS) of Altitude Ground Test Facilities(AGTF) with large heat transfer uncertainty and disturbance, a new adaptive control structure of modified robust optimal adaptive control is presented.The mathematic modeling of FESS is given and the influence of heat transfer is analyzed through energy view. To consider the influence of heat transfer in controller design, we introduce a matched uncertainty that represents heat transfer influence in the linearized system of FESS. Based on this linear system, we deduce the design of modified robust optimal adaptive control law in a general way. Meanwhile, the robust stability of the modified robust optimal adaptive control law is proved through using Lyapunov stability theory. Then, a typical aero-engine test condition with Mach Dash and Zoom-Climb is used to verify the effectiveness of the devised adaptive controller. The simulation results show that the designed controller has servo tracking and disturbance rejection performance under heat transfer uncertainty and disturbance;the relative steady-state and dynamic errors of pressure and temperature are both smaller than 1% and 0.2% respectively. Furthermore,the influence of the modification parameter c is analyzed through simulation. Finally, comparing with the standard ideal model reference adaptive controller, the modified robust optimal adaptive controller obviously provides better control performance than the ideal model reference adaptive controller does. 展开更多
关键词 Altitude ground test facilities Flight environment simulation system Heat transfer Model reference adaptive control Optimal control modification UNCERTAINTY
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3-D MEASUREMENT OF VORTEX BREAKDOWN IN CLOSED CYLINDRICAL CONTAINER VIA LDV 被引量:1
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作者 Liu, Y.Z. Chen, H.P. Koyama, H.S. 《Journal of Hydrodynamics》 SCIE EI CSCD 2001年第2期24-28,共5页
A 3-D velocity measurement was carried out via LDV for vortex breakdown of swirling flow in a closed cylindrical container with a rotating disk. The experimental results of swirling flow at Ar=1.78 and Re=648-2527 are... A 3-D velocity measurement was carried out via LDV for vortex breakdown of swirling flow in a closed cylindrical container with a rotating disk. The experimental results of swirling flow at Ar=1.78 and Re=648-2527 are presented. At the axis, the axial velocity variation with Re describes the formation, development and disappearance of the vortex breakdown, which agrees with Escudiers's conclusion. In the meridional plane, the velocity vectors show that the bubble type vortex breakdown region is a closed and low velocity circulating flow, which is fully isolated from the main flow thrown out by the rotating disk. For the peripheral velocity in the central region of the container, the maximum does not appear near the rotating top disk but near the stationary bottom disk and it varies sharply there. Numerical simulation results under the same conditions are also given in this paper. 展开更多
关键词 Computer simulation Containers test facilities Three dimensional Velocity measurement
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