Oscillating disturbance propagation in passages of multi-stage hydrogen turbine

摘要

The propagation of oscillating disturbances with various frequercies in multi-stage turbine passages in a rocket is analyzed using the oscillating fluid mechanics theorem and the parametric polynomial method. The results show that oscillating disturbances can be rapidly dissipated when the disturbance occurs at the inlet except for very high-frequercy oscillation such as 50 kHz. Dangerous low-frequercy oscillations occur at the outlet. The effects of the flow parameter variations on the oscillating disturbance propagation are also studied. The analysis will facilitate safe operation of the whole rocket system.