某火箭试验台低温甲烷排放过程数值模拟  

Numerical simulation of cryogenic methane dispersion in a test stand

作　　者：赵耀中[1,2] 游良平[2] 孔凡超[2] 张家仙[2] Zhao Yaozhong You Liangping Kong Fanchao Zhang Jiaxian(State Key Laboratory of Technologies in Space Cryogenic Propellants,Beijing 100028 ,China Beijing Institute of Aerospace Testing Technology, Beijing 100074, China)

机构地区：[1]航天低温推进剂技术国家重点实验室,北京100028 [2]北京航天试验技术研究所,北京100074

出　　处：《低温工程》2017年第4期68-72,78,共6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)资助

摘　　要：以低温甲烷安全排放为目的,采用数值模拟方法对某试验台甲烷高空排放系统进行研究,分别采用AMESim软件及Fluent软件对排放管内的流动和管外的扩散情况进行了分析,安全排放准则为甲烷云团向上飘动或者水平扩散,研究工况包括了长期稳定排放及大流量短期排放。计算结果表明:排放流量越小越安全,长期稳定排放时甲烷的最大排放流量不能超过75g/s;试验台常规排放流量200 g/s最长的排放时间不得超过300 s,最长排放时间随着排放流量的增加而减小。Numerical simulation method was adopted to analyze methane release in a test stand. The flow of methane in the pipe and the diffusion outside pipe were studied by AMESim and Fluent software re- spectively. The safety criterion is that methane clouds flutter upwards or horizontally. This research included long-term stable release and short-term release with large flow rate. The results show that the methane re- lease is much safer at a small flow rate, and the maximum flow rate of stable release was no more than 75 g/s;the longest release time should not exceed 300 s with the flow rate of 200 g/s;the longest safe release time is shortened with the release flow increased.

关 键 词：甲烷 排放 扩散 安全 

分 类 号：TB613[一般工业技术—制冷工程]