双转子发动机转差引起的叶片尾流激振

介绍了双转子结构发动机在飞行使用中高、低压转子转速差随转速的变化特点,提出了转差可能在高、低压转子交界处的动叶间引起尾流激振的观点,并通过计算实例对转差引起的叶片尾流激振特点作了简要描述.与导向器的尾流激振比较,转差引起的叶片尾流激振有着易激起危险的低阶振型、共振转速范围宽和激振强度低的特点.

Blade wake excitation caused by twin-shaft engine speed difference

This paper proposed the features of speed difference's change along with high pressure or low pressure rotor speed when twin-shaft engine was used in flight.A point of view was presented that speed difference is likely to arouse wake excitation between high pressure and low pressure rotor blade.The features of blade wake excitation caused by speed difference were briefly described through numerical examples.As compared with vane wake excitation,the blade wake excitation caused by speed difference features low stage vibration mode of high hazard exposure,wide resonance speed range and low excitation intensity.