CAJ | 학술논문

为研究叶尖间隙对某型高速离心压气机性能和气动稳定性的影响，采用NUMECA软件详细研究了在不同叶尖间隙下的三维黏性流场，计算结果表明，随着叶尖间隙增大，叶轮叶尖泄漏流的强度明显增强，导致叶轮的增压能力下降，效率减小；稳定工作范围先减小后增大，同时还会导致失稳原因发生改变。
위연구협첨간극대모형고속리심압기궤성능화기동은정성적영향，채용NUMECA연건상세연구료재불동협첨간극하적삼유점성류장，계산결과표명，수착협첨간극증대，협륜협첨설루류적강도명현증강，도치협륜적증압능력하강，효솔감소；은정공작범위선감소후증대，동시환회도치실은원인발생개변。
In order to research the effect of clearance widths on centrifugal compressor ,a high speed cen-trifugal compressor was investigated by numerical simulation .The results show that the tip leakage flow will be strengthened ,total pressure ratio and adiabatic efficiency will decrease as the tip clearance width increasing .The stable operating region first decrease with small tip clearance width , and will increase e with large tip clearance width .The tip clearance width will change the mechanism of instability .