摘要
以某航空发动机三级风扇为研究对象,选择叶片厚度为优化变量,叶片绝热效率为优化目标,采用全三维叶型优化方法对某三级风扇中的第二级转子进行了优化设计。在设计转速下,对优化前后的单转子及其所在的三级风扇进行了全三维数值模拟,并对计算结果进行了对比分析。结果表明:在设计转速工作点,优化后叶型波前马赫数降低,激波强度减弱,叶片槽道内激波损失、径向掺混损失均有所减小,激波与附面层相互作用减弱;优化后单转子效率提高了1.6%;采用优化后转子叶型的三级风扇总效率提高了0.5%。
With the resort to software Fine/Design 3D anti a computational fluid dynamics method, the optimization design of a three-dimensional blade was carried out for one fan blade based on steepest descent method in which the thickness was variable and the thermal effeicency was optimtimized target. Then three-dimensional numerical simulation software named Fine/ Turbo was used to calculate single rotor and the three stages fan before am] after optimization at design rotating speed. The flow field perfnrmanee under design speed condition was obtained. Numerical results show thai the single blade efficiency is increased by 1.6% at design point after optimization and the three stages fan effic, iency is increased by 0.5%. After the optimization, the maeh number before wave is reduced and the loss of wave and radial mixed tlow h,ss are both reduced , meantime the flow of boundery layer is controlled effectively.
出处
《机械工程师》
2014年第7期208-211,共4页
Mechanical Engineer
关键词
一最速下降法
三维数值模拟
叶型优化
特性
steepesl decemt method
three-dimentional numerical simulation
Made optimization
performance
