摘要
文献[1]首先提出了采用倾斜叶片来降低透平静叶损失的设想。此后有过许多研究都表明,适当改变积叠方式可以改变叶片表面径向压力分布,以达到控制附面层内低能量流体的流动、减少叶栅损失的目的。为了了解这种措施对流场的影响,本文以文献[7]中用传统周期性条件的全三元势函数程序,对文献[3]中径高比为3的实验叶栅(图1和2)求出了径向叶栅、正倾斜20°、负倾斜20°及复合倾斜叶栅(根部正倾斜20°,顶部基本径向)内的全三元流场,并对计算结果进行了分析。
The leaned turbine stator cascade flow field is analysed with a 3D potential function computer code. It is concluded that the lean mainly influences the suction surface and the downstream and inner part of the cascade channel. The positive lean (the blade suction surface close to the hub surface) will decrease the radial gradient of pressure and radial velocity which are beneficial to the flow near hub region, the negative lean has the opposite results and is beneficial to the tip region. Therefore, a combined lean is recommended. In addition, it is proposed that a non-controled-vortex design turbine stage can be improved by stator lean without changing the reaction and rotor blade design.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
1989年第1期32-35,共4页
Journal of Engineering Thermophysics
