Study on Torch Ignition Scheme for Expander Cycle LOX/LH2 Engine
In response to the multiple ignition requirement of the expander cycle hydrogen-oxygen engine,research on the torch ignition system scheme is conducted,and a relatively reasonable low-pressure torch ignition system scheme is identified.The results show that the mixing ratio of the torch igniter fluctuated greatly when opening the hydrogen main valve,which may cause structural ablation.The scheme of introducing hydrogen from the inlet of the hydrogen turbine and liquid oxygen from the outlet of the liquid oxygen pump has a lower ablation risk,but it has a certain impact on the engine's start-up and steady-state characteristics.The low-pressure torch ignition start-up tests of liquid rocket engine are carried out for the first time in China.The experimental results verify the simulation results,and indicating the feasibility of the scheme.
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