空气动力学学报2024，Vol.42Issue(11)：33-42,10.DOI:10.7638/kqdlxxb-2023.0165
非轴对称端壁造型在大径向落差长度比压气机中介机匣中的应用
Application of non-axisymmetric endwall contouring in compressor intermediate duct with a large radius change to length ratio
摘要
Abstract
In order to explore the application potential of non-axisymmetric endwall contouring in the compressor intermediate duct with a large radius change to length ratio,the aerodynamic characteristic of this type of compressor intermediate duct has been numerically studied in the present work,and the effect of the non-axisymmetric endwall contouring on the hub of the compressor intermediate duct has been investigated in terms of flow and throttle characteristics.The results show that,the flow loss and outlet flow distortion of the compressor intermediate duct are mainly originated from the corner separation of the strut.With the increase of the flow rate,the flow loss and outlet flow distortion are enhanced,which is opposite to the change of the strut corner separation.On this basis,this study has proposed a novel approach for non-axisymmetric endwall contouring using trigonometric functions.By adjusting the curvature of the hub contour near the strut and modifying the axial pressure gradient,this method can effectively reduce the intensity of the corner separation around the strut.Moreover,the implementation of such a non-axisymmetric endwall contouring does not compromise the decreasing trend of the total pressure recovery coefficient with increasing flow rate.Within a wide range of large flow rates(with the relative flow rate not lower than 0.6)in the compressor intermediate duct,this method can successfully attenuate the intensity of secondary flows within the compressor intermediate duct,and reduce the total pressure loss coefficient of the intermediate duct by about 6.4%.关键词
压气机/中介机匣/角区分离/端壁造型/节流特性Key words
compressor/intermediate duct/corner separation/endwall contouring/throttle characteristic分类
航空航天引用本文复制引用
茅晓晨,李敏,高丽敏,吴瑜..非轴对称端壁造型在大径向落差长度比压气机中介机匣中的应用[J].空气动力学学报,2024,42(11):33-42,10.基金项目
国家自然科学基金青年项目(52106057) （52106057）
引智计划(B17037) （B17037）
中央高校基本科研业务费(D5000210483) （D5000210483）
翼型、叶栅空气动力学国家级重点实验室基金(D5150210006,D5050210015) （D5150210006,D5050210015）
