venting

So when investigate the ignition in high altitude, much more attention should be paid on sluicing procedure in vacuum, differences of propellant properties at sea level or in high altitude.

真空状态对高空液体火箭发动机的工作过程具有重要影响,研究液体火箭发动机高空点火、真空排放等过程时,必须对所采用的推进剂在真空状态与地面状态下的差别进行仔细研究。