Numerical simulation on start-up process in thrust chamber based on flamelet model

Numerical simulation on start-up process in thrust chamber of hydrogen-oxygen rocket engine was performed by computational fluid dynamics method. Dual-time-step method and steady laminar flamelet model were utilized to simulate the unsteady process and combustion process, respectively. The database of flamelet model was set up by 8 steps with 6 specices chemical reaction model. The pressure curve and the detailed parameters of flowfield were achieved from the simulation, which was performed according to the time sequence of start-up process. It turns out that, the steady laminar flamelet model is available to the start-up process and the pressure curve shows good consistency with the test curve.