亚音速轴流压气机转子非轴对称轮毂端壁的数值研究  

NUMERICAL INVESTIGATION ON A SUBSONIC AXIAL-FLOW COMPRESSOR ROTOR WITH THE IMPLEMENTATION OF NON-AXIASYMMETRIC HUB END WALL

作　　者：胡书珍[1,2] 卢新根[1] 张宏武[1] 朱俊强[1] 

机构地区：[1]中国科学院工程热物理研究所,北京100190 [2]中国科学院研究生院,北京100039

出　　处：《工程热物理学报》2009年第3期385-388,共4页Journal of Engineering Thermophysics

基　　金：国家重点基础研究发展规划项目(No.2007CB210103);国家自然科学基金项目(No.50806073);中国博士后科学基金特别资助项目

摘　　要：修改端壁型线是减小二次流损失提高压气机性能的有效方法之一.本文针对某高亚音速压气机转子,首先利用三角函数造型法完成了非轴对称轮毂端壁造型,然后对带非轴对称端壁结构的轴流压气机内部流场进行了详细的数值模拟,数值计算所获得的总性能与试验结果符合较好,该非轴对称轮毂端壁结构的引入能使得压气机的峰值效率提高约0.3285%。详细分析了非轴对称端壁结构对压气机内部流场结构的影响,结果表明:非轴对称轮毂端壁结构的采用能够改善轮毂端壁附近载荷分布,有效地降低叶片通道的二次流流动,从而提高轴流压气机的性能。One approach among others to reduce secondary flow loss and increase the performance of modern compressors consists in the modification of the endwall. This paper discusses the application of a non-axisymmetric hub endwall on a high-subsonic axial-flow compressor. The non-axisymmetric hub endwall was designed for a subsonic compressor rotor with the help of sine and cosine function and the coupled flow of the compressor rotor with non-axisymmetric hub end-wall was simulated with a state-of-the-art multiblock flow solver. The numerical results with axisymmetric hub endwall agreed well with the experimental data for estimation of the global performance, and this type of nonaxisymmetric hub endwall was found to have a significant raise in efficiency of approximately 0.3285%, while a slight increase of the total pressure ratio. The fundamental mechanisms of non-axisymmetric hub endwall and their effects on the subsonic axial-flow compressor endwall flow field was analyzed in detail, It is concluded that the non-axisymmetric endwall profiling, though not optimum, can improve the aerodynamic performance of the compressor rotor by reducing of the secondary loss and the strength of secondary flow.

关 键 词：轴流压气机 非轴对称轮毂端壁 二次流损失 数值模拟 

分 类 号：V321.3[航空宇航科学与技术—人机与环境工程]