重气泄漏扩散过程数值模拟  

Numerical simulation of heavy gas dispersion

作　　者：喻闯闯 刘瑞敏[1,2] 罗天培 张家仙[1,2] 曲胜 毕明卉[1,2] Yu Chuangchuang;Liu Ruimin;Luo Tianpei;Zhang Jiaxian;Qu Sheng;Bi Minhui(Beijing institute of Aerospace Testing Technology, Beijing 100074, China;Beijing Engineering Research Center of Aerospace Propulsion Testing Technology and Equipment, Beijing 100074, China)

机构地区：[1]北京航天试验技术研究所,北京100074 [2]北京市航天动力试验技术与装备工程技术研究中心,北京100074

出　　处：《低温工程》2018年第3期45-51,共7页Cryogenics

基　　金：航天低温推进剂技术国家重点实验室基金课题(SKLTSCP1514)

摘　　要：为研究重气泄漏扩散特性,采用多相流计算流体力学(CFD)模型对Burro现场试验进行了模拟。通过模拟结果与试验数据的对比完成了模型的验证,随后基于模拟结果分析了重气泄漏扩散行为特点,结果表明重气扩散行为主要沿地表进行,大气风虽然能够一定程度上抑制其上风向与展向扩散,但是在浓度差与重力下沉现象的作用下,重气云团仍然能够在上风向、展向扩散相当远的距离。最后,对重气云危险域在各个方向上到达的最远距离进行了对比分析,并对其变化机理进行了分析。A multiphase CFD model was used to simulate classical Burro series tests to study and analyze the characteristics of heavy gas diffusion. The simulation results were compared with the data from Burro-8 test for validation. Then,characteristics of heavy gas dispersion are analyzed based on the results. It was demonstrated that the heavy gas diffuses mostly along the surface. Although the atmosphere wind can mitigate the dispersion,the heavy gas dispersion distance was still considerable in the upwind direction and crosswind direction. Finally,Maximum distance to the upwind,downwind,crosswind and height of methane hazard region were analyzed,and its formation mechanism was described and analyzed.

关 键 词：重气 扩散 安全管理 多相流 数值模拟 Burro 

分 类 号：V434[航空宇航科学与技术—航空宇航推进理论与工程] TB611[一般工业技术—制冷工程]