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在液氧/甲烷发动机地面试验中,发动机预冷过程中或试验结束后,存在大量的甲烷需要进行排放处理。研究发现,原有甲烷排放系统在排放过程中甲烷向低空扩散较多,容易在地面形成积聚,发生危险。为了解决这些问题,重新设计了甲烷的排放方式,并进行了数值模拟研究。数值模拟显示,新的排放方式向上扩散较多,甲烷不易积聚。同时,还研究了甲烷的扩散规律,为后续研究火炬点火等处理方式提供了参考依据。
In liquid oxygen / methane engine ground tests, large amounts of methane are required to be discharged during or after engine precooling or after testing. The study found that in the original methane emission system, methane was diffused to low altitude during the discharge process, which easily accumulated on the ground and was in danger. In order to solve these problems, the methane emission was redesigned and the numerical simulation was conducted. Numerical simulations show that the new emission patterns are diffused upwards and methane is not easily accumulated. At the same time, the law of methane diffusion was also studied, which provided a reference for further research on torch ignition and other treatment methods.