CAJ | 학술논문

以某型发动机高压涡轮转子叶片吸力面腮区气膜孔为研究对象,通过模拟发动机状态的模型试验,研究了旋转数、吹风比和主流雷诺数对气膜孔冷却效率的影响.结果表明,旋转会导致气膜覆盖区域向高半径方向偏转,且旋转数越大,偏转角度越大,气膜冷却效率越低;同时,旋转会弱化吹风比、主流雷诺数等对气膜冷气效率的影响.研究获得的旋转状态下涡轮转子叶片型面典型区域气膜冷却特性的试验数据,可为发动机转子叶片冷却设计提供参考.
이모형발동궤고압와륜전자협편흡력면시구기막공위연구대상,통과모의발동궤상태적모형시험,연구료선전수、취풍비화주류뢰낙수대기막공냉각효솔적영향.결과표명,선전회도치기막복개구역향고반경방향편전,차선전수월대,편전각도월대,기막냉각효솔월저;동시,선전회약화취풍비、주류뢰낙수등대기막랭기효솔적영향.연구획득적선전상태하와륜전자협편형면전형구역기막냉각특성적시험수거,가위발동궤전자협편냉각설계제공삼고.
@@@@Experimental investigations were carried out to study the influence of rotation number, blowing ratio and mainstream Reynolds number on film cooling efficiency by simulating engine working condition. The results show that rotation will make the film coverage region lean to higher radial direction, the deflec?tion angle will become larger and the film cooling efficiency lower as the rotation number gets greater. At the same time, rotation will weaken the effect of blowing ratio and mainstream Reynolds number on film cooling efficiency. The test data of film-hole cooling characteristics at the typical regions of HPT surface gained through the study could be referential to the experiment database of the engine blade cooling design.