扩压叶栅缩放模化中表面粗糙度的影响及其修正方法  

Effects of Surface Roughness on Scaled-model Compressor Cascades and Correction Method

作　　者：王英杰 胡磊 戴韧[2] Ying-jie Wang;Lei Hu;Ren Dai(Shanghai Electric Gas Turbine Co.,Ltd.;School of Energy and Power Engineering,University of Shanghai for Science and Technology;Shanghai Electric Power Station Equipment Co.,Ltd.)

机构地区：[1]上海电气燃气轮机有限公司 [2]上海理工大学能源与动力工程学院 [3]上海电气电站设备有限公司

出　　处：《风机技术》2021年第6期9-15,I0001,共8页Chinese Journal of Turbomachinery

基　　金：国家科技重大专项2017-V-0016-0069。

摘　　要：从扩压叶栅实验研究时的模化问题出发,研究表面粗糙度和基于弦长的雷诺数对叶型损失系数的影响并总结其影响规律。基于零压力梯度流动表面粗糙度影响的边界层理论及水力光滑条件下雷诺数改变对压气机性能的影响规律,综合考虑表面粗糙度k_(s)和雷诺数Re对叶型损失的影响,建立了扩压叶栅的叶型损失修正方法,初步解决了模化设计与母型之间性能换算的问题。The influences of surface roughness and Reynolds number based on chord length on blade profile loss coefficient are studied and an influence law is summarized.Based on the boundary layer theory of the effects of surface roughness on zero-pressure gradient flow and the influence law of Reynolds number variation on compressor performance under hydraulic smooth conditions,the influences of surface roughness k_(s) and Reynolds number Re on blade profile loss are considered synthetically.Profile loss correction method of diffuser cascade is established.Performance correlation between the Scale-model and the original profile is preliminarily solved.

关 键 词：扩压叶栅 叶型缩放 雷诺数 表面粗糙度 叶型损失 修正方法 

分 类 号：TK474.81[动力工程及工程热物理—动力机械及工程]