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应用 Beam- Warming近似因式分解方法差分求解薄层 N- S方程 ,对某型发动机在多种工况下的分离流场进行计算。结果表明 ,燃烧室总压与环境压强的比值控制分离点位置 ;对于相同的喷管扩张段型面 ,喷管面积比对分离位置的影响小 ;扩张段较长的喷管分离点面积比较小
The Beam-Warming approximation factorization method is used to solve the thin-layer N-S equation. The separation flow field of a certain type of engine under various working conditions is calculated. The results show that the ratio of the total pressure in the combustion chamber to the pressure in the environment controls the position of the separation point. For the same nozzle expansion section, the nozzle area ratio has less influence on the separation position, and the nozzle divergence area with longer expansion section is smaller