Effects of surface roughness on the aerodynamic performance of a high subsonic compressor airfoil at low Reynolds number

作     者：Mingyang WANG Chengwu YANG Ziliang LI Shengfeng ZHAO Yanfeng ZHANG Xin’gen LU Mingyang WANG;Chengwu YANG;Ziliang LI;Shengfeng ZHAO;Yanfeng ZHANG;Xin'gen LU

作者机构：Key Laboratory of Light-Duty Gas-TurbineInstitute of Engineering ThermophysicsChinese Academy of SciencesBeijing 100190China University of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2021年第34卷第3期

页      面：71-81页

核心收录：

学科分类：082502[工学-航空宇航推进理论与工程] 08[工学] 0825[工学-航空宇航科学与技术] 

基　　金：the financial support of the National Natural Science Foundation of China (No. 51836008) the National Major Science and Technology Project of China (No. 2017-Ⅱ-0010-0024) for this project 

主　　题：Aerodynamic performance Compressor airfoil Low Reynolds number Separation bubble Surface roughness Viscous dissipation 

摘      要：The aerodynamic performance of compressor airfoil is significantly affected by the surface roughness at low Reynolds number(Re).In the present study,numerical simulations have been conducted to investigate the impact of surface roughness on the profile loss of a high subsonic compressor airfoil at Re=1.5×10^(5).Four roughness locations,covering 10%,30%,50%and 100%of the suction surface from the leading edge and seven roughness magnitudes(Ra)ranging from 52 to525 lm were *** showed that the surface roughness mainly determined the loss generation process by influencing the structure of the Laminar Separation Bubble(LSB)and the turbulence level near the *** all the roughness locations,the variation trend for the profile loss with the roughness magnitude was *** the transitionally rough region,the negative displacement effect of the LSB was suppressed with the increase of roughness magnitude,leading to a maximum decrease of 14.6%,16.04%,16.45%and 10.20%in the profile loss at Ra=157 lm for the four roughness locations,***,with a further increase of the roughness magnitude in the fully rough region,the stronger turbulent dissipation enhanced the growth rate of the turbulent boundary layer and increased the profile loss *** comparison,the leading edge roughness played a dominant role in the boundary layer development and performance *** take fully advantage of the surface roughness reducing profile loss at low Re,the effects of roughness on suppressing LSB and inducing strong turbulent dissipation should be balanced effectively.