转子涡动对旋转冲压转子进气道起动及性能的影响 *

Effects of Rotor Whirl on Starting Ability and Flow

关键词:  旋转冲压转子  转子涡动  进气道起动  性流动能  稳定性

Key words:  Rampressor rotor  Rotor whirl  Inlet starting  Flow performance  Stability

摘要:

为了获取转子涡动作用下旋转冲压转子进气道起动及性能的变化规律，对旋转冲压转子涡动时压缩进气道的内部流场进行了数值仿真，分析了转子不同涡动幅值条件下旋转冲压转子进气道的起动转速及性能变化。研究结果表明，转子涡动对旋转冲压转子进气道起动及性能具有显著的影响。旋转冲压转子进气道的稳定工作范围随着转子涡动幅值的增大而逐渐减小。转子涡动幅值对旋转冲压转子进气道性能的影响存在极值点。当涡动幅值小于该极值点e=100μm时，进气道的流动性能良好。旋转冲压转子在定工况运行时，旋转冲压转子进气道流动稳定性随着转子涡动幅值的减小而增强。

Abstract:

In order to obtain the variation of starting ability and performance of inlet flow field under rotor whirl，the compression inlet flow field of Rampressor rotor is simulated based on rotor whirl. Starting speed and flow performance of Rampressor inlet are analyzed under different rotor whirl amplitude. The results show that rotor whirl has significant effect on starting ability and performance of Rampressor rotor inlet. Along with the increment of rotor whirl amplitude，the stable working range of Rampressor rotor inlet is reduced. The effect of rotor whirl on flow performance of Rampressor inlet has an extreme point. When rotor whirl amplitude is less than this extreme point e=100μm，flow performance of Rampressor inlet gets better. On the constant operation condition of Rampressor rotor，flow stability of Rampressor inlet heightens with the increase of rotor whirl amplitude.