Compilation method of reusable rocket engine turbopump load spectrum
The first sub-stage engine of the reusable rocket sends the rocket into the predetermined orbit through multiple fires,returns and recovers at a fixed point,and the damage accumulation and fatigue problems will occur after multiple starts and shutdowns.It is an important work in the development of the reusable rocket engine to master the real load spectrum of the liquid engine turbo pump.A load spectrum programming method is proposed for the reuse of the first substage engine turbopump of rocket.According to the recovery mission plan,the full cycle flight profile of the mission is determined,the rocket dynamics equation is established,and the thrust adjustment range and mass flow rate of the engine in each flight profile of a substage are calculated.Based on propellant composition,mass flow rate and other parame-ters,the speed and power changes of a turbopump are calculated,and the speed spectrum and power spectrum are prepared.Based on the analysis of SpaceX Falcon 9 sub-stage land recovery mission CRS-11,the full cycle load spectrum of the mission is compiled,and a sub-stage engine thrust spectrum,turbopump speed spectrum and power spectrum are obtained.The load spectrum compilation method is verified by the real thrust data.The research results can provide support for the development of reusable engines.
万方数据
维普
