期刊文献+

叶轮顶部间隙对向心透平总体性能影响的研究 被引量:13

EFFECTS OF ROTOR BLADE TIP CLEARANCE ON TOTAL AERODYNAMIC PERFORMANCE IN A RADIAL INFLOW TURBINE
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摘要 对微型燃机向心透平叶轮顶部间隙流动在级环境下进行了全三维粘性数值模拟.研究结果表明:顶部间隙小于 2%时,间隙每增加1%,级效率降低1.5%,而级通流能力有所降低;径向与轴向间隙变化对级性能影响有很大差别, 径向间隙增加对级效率降低的影响是轴向间隙增加的8.3倍,径向间隙增加使通流能力增强的程度是轴向间隙增加使通流能力减弱的4.2倍。此外,将间隙流场与文献报道试验结果进行了比较,差别主要在工作轮顶部区域。 Tip clearance flow in a radial inflow turbine rotor blade under stage environment was investigated by 3-dimensional viscous flow simulation. The results indicate that for tip uniform clearance less than 2 percent of the rotor blade exit height, a decrease of 1.5 percent in stage efficiency and a slight reduction of the flow rate occur for each percent increase in the rotor blade tip uniform clearance. There is a notable difference of the stage aerodynamic performance affected by radial clearance at the rotor exit and axial clearance at the rotor entrance, respectively. Radial clearance increases at the rotor exit have about 8.3 times the effect on stage efficiency decrease as axial clearance increases at the rotor entrance, while the flow rate enlarged by radial clearance increase is 4.2 times greater than that reduced by axial clearance increase. Moreover, the distinction is mainly at the top region of the rotor exducer when the tip clearance flow field was compared with experimental results documented.
出处 《工程热物理学报》 EI CAS CSCD 北大核心 2006年第3期408-410,共3页 Journal of Engineering Thermophysics
基金 国家863燃气轮机重大专项基金项目(No.2002AA503020) 西安交通大学创新研究群体项目(No.DFXJTU2005-02)
关键词 微型燃气轮机 向心透平 叶轮 顶部间隙 数值模拟 microturbine radial inflow turbine rotor tip clearance numerical simulation
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参考文献9

  • 1Yaras M I,Sjolander S A.Effects of Simulated Rotation on Tip Leakage in a Planar Cascade of Turbine Blades:Part Ⅰ-Tip Gap Flow.Transactions of ASME,1992,114(4):652-660
  • 2Yaras M I,Sjolander S A.Prediction of Tip-Leakage Losses in Axial Turbines.Journal of Turbomachinery,Transactions of ASME,1992,114(2):204-210
  • 3Dambach R.Tip Leakage Flow in a Radial Inflow Turbine:[Ph.D.Thesis].Cambridge University Engineering Department,1999
  • 4邓清华,牛久芳,丰镇平.微型燃机向心透平叶轮顶部间隙流动的数值模拟[J].西安交通大学学报,2005,39(7):685-688. 被引量:7
  • 5邓清华.100 kW微型燃气轮机向心透平气动设计与特性分析的研究.西安:西安交通大学,2004
  • 6Feng Zhenping,Deng Qinghua,Li Jun.Aerothermodynamic Design and Numerical Simulation of Radial Inflow Turbine Impeller for a 100 kW Microturbine.ASME Paper GT2005-68276,2005
  • 7邓清华,丰镇平.微型燃气轮机向心透平导向器的流场分析与设计研究[J].西安交通大学学报,2005,39(9):962-965. 被引量:8
  • 8Moustapha H,Zelesky M F,Baines N C,et al.Axial and Radial Turbines.Concepts NREC,2004
  • 9Futral S M,Holeski D E.Experimental Results of Varying the Blade-Shroud Clearance in a 6.02-Inch Radial Inflow Turbine.NASA Technical Note D-5513.Washington,DC:NASA,1970

二级参考文献11

  • 1Rains D A. Tip clearance flows in axial flow compressors and pumps[D]. California: California Institute of Technology, 1954.
  • 2Yaras M I, Sjolander S A. Effects of simulated rotation on tip leakage in a planar cascade of turbine blades, part Ⅰ: tip gap flow[J]. ASME Journal of Turbomachinery , 1992,114 (4) : 652-660.
  • 3Yaras M I, Sjolander S A. Prediction of tip-leakage losses in axial turbines[J]. ASME Journal of Turbomachinery,1992,114(2): 204-210.
  • 4Futral S M, Holeski D E. Experimental results of varying the blade-shroud clearance in a 6.02-inch radial inflow turbine[R]. NASA Technical Note, D-5513. Washington, DC: NASA, 1970.
  • 5Dambach R, Hodson H P, Huntsman I. An experimental study of tip clearance flow in a radial inflow turbine[J]. ASME Journal of Turbomachinery, 1998, 121(4): 644-650.
  • 6范英俊.铸造手册:特种铸造(第二版)[Z].北京:机械工业出版社,2003..
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  • 9Reichert A W, Simon H. Design and flow field calculations for transonic and supersonic radial inflow turbine guide vanes[J]. ASME Journal of Turbomachinery, 1997,119(2): 103-113.
  • 10Feng Zhenping, Deng Qinghua, Li Juru Aerothermodynamic design and numerical simulation of radial inflow turbine impeller for a 100kW microturbine[A].ASME Turbo Expo 2005, Reno Hilton, Nevada, 2005.

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