摘要
以20 L球型爆炸装置中的气液输送管段为研究对象,结合数值模拟方法,分析了气液输送管段中气液两相流的流型结构和截面含气率特性,基于此对气液输送管段的曲率半径和水平管段长度进行优化设计。结果表明:在0.6 MPa压力下,C_(6)H_(14)、C_(7)H_(16)、C_(8)H_(18)和C_(10)H_(22)均可以形成稳定的环状流;随着压力升高,C6H14和C7H16的流型结构有趋于不稳定的趋势。在0.6~0.9 MPa压力下,当气液输送管段曲率半径为34 mm、管段长度在200~300 mm之间时,大部分液相呈膜状沿管壁运动,且液膜分布较均匀;气相在管段中心处高速流过,具有良好的气芯,形成的环状流流型结构更稳定。对气液输送管段的优化设计可使爆炸特性的测量更精确,也可为研究可燃液体燃料爆炸问题及工程设计提供参考。
The paper takes the gas-liquid conveying pipe section in a 20 L spherical explosive device as the research object.The flow pattern structure and cross-section air voids characteristics of gas-liquid two-phase flow in the gas-liquid conveying pipe were studied by numerical simulation.The curvature radius and horizontal pipe length of the gas-liquid conveying pipe section were optimized and designed based on the simulation.The results show that C_(6)H_(14),C_(7)H_(16),C_(8)H_(18),and C_(10)H_(22) can form stable annular flow under at pressure of 0.6 MPa.The flow structure of C_(6)H_(14) and C_(7)H_(16) tends to become unstable with increasing pressure.Under the pressure conditions of 0.6–0.9 MPa,when the curvature radius of the gas-liquid conveying pipeline section is 34 mm and the length of the pipeline section is 200–300 mm,most of the liquid phase forms a film and moves along the pipeline wall,and the distribution of the liquid film is relatively homogeneous.The gas phase located in the center of the pipe section flows at high speed with a good gas core.It forms a more stable annular flow pattern structure.The optimization design of the gas-liquid conveying pipeline section can make the measurement of explosion characteristics more accurate,and provide a reference for the study of combustible liquid fuel explosion problems and engineering design.
作者
李峰
张晨雨
王悦
王博
张梦雨
荆亚东
LI Feng;ZHANG Chenyu;WANG Yue;WANG Bo;ZHANG Mengyu;JING Yadong(School of Emergency Management and Safety Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;Research Center of Coal Mine Mechanical and Electrical Engineering,Xinjiang Institude Engineering,Urumqi 830023,Xinjiang,China)
出处
《高压物理学报》
CAS
CSCD
北大核心
2023年第4期175-186,共12页
Chinese Journal of High Pressure Physics
基金
国家自然科学基金(21865036,52064046)
中国矿业大学煤炭资源与安全开采国家重点实验室-新疆工程学院联合基金(SKLCRSM-XJIEKF007)
中央高校基本科研业务费专项资金(2023ZKPYAQ03)。
关键词
20
L爆炸装置
多相流
气液输送管道
爆炸特性
20 L explosive device
multiphase flow
gas-liquid transmission pipeline
explosive characteristics
