CAJ | 학술논문

将一跨音速静叶栅数值计算结果与实验结果进行了比较,表明计算与实验结果吻合的较好.为了讨论跨音速压气机中弯掠叶片适用的展弦比条件,在0°攻角下,展弦比为1.25、1.50和2.00,对0～30°弯掠叶片流场进行了数值分析,结果表明,当10°弯掠角时,小展弦比弯掠叶片对叶片性能影响较为明显;而在20°弯掠角时,大展弦比弯掠叶片对叶片性能影响较为明显.弯掠叶片使前缘激波转化为斜激波,并减弱了通道激波的强度,因而降低了叶栅激波损失.可以证明,在跨音速条件下展弦比的大小是如何使用弯掠叶片的一个重要的参考因素.
장일과음속정협책수치계산결과여실험결과진행료비교,표명계산여실험결과문합적교호.위료토론과음속압기궤중만략협편괄용적전현비조건,재0°공각하,전현비위1.25、1.50화2.00,대0～30°만략협편류장진행료수치분석,결과표명,당10°만략각시,소전현비만략협편대협편성능영향교위명현;이재20°만략각시,대전현비만략협편대협편성능영향교위명현.만략협편사전연격파전화위사격파,병감약료통도격파적강도,인이강저료협책격파손실.가이증명,재과음속조건하전현비적대소시여하사용만략협편적일개중요적삼고인소.
A comparison of the numerical calculation results of a transonic stationary cascade with the test ones shows that they are in relatively good agreement.To determine an appropriate aspect ratio for bowed and swept blades in a transonic comp ressor,numerically analyzed were the flow fields of the bowed and swept blades with 0～30 degrees having an aspect ratio of 1.25,1.50 and 2.00 respectively at an attack angle of 0 degree.It has been found that when the bowed and swept angle is set at 10 degrees,the bowed and swept blades with a small aspect ratio have a comparatively conspicuous influence on the blade performance.When the above-mentioned angle is 20 degrees,the blades with a big aspect ratio exercise a relatively obvious influence on the blade performance.The bowed and swept blades can make the shock waves at the leading edge being converted to oblique shock waves and weaken the intensity of the passage shock waves,thus reducing the shock wave losses of the cascade.It can be proven that the magnitude of the aspect ratio under the transonic conditions represents an important reference factor on how to use the bowed and swept blades.