壁面粗糙度对隔离段气动性能影响的数值计算  

Numerical simulation of the effect of wall roughness on isolator aerodynamic performance

作　　者：张凡 周少伟[1] 王艳华[3] 李于来 戴军 ZHANG Fan;ZHOU Shaowei;WANG Yanhua;LI Yulai;DAI Jun(China Ship Development and Design Center,Wuhan 430064,China;School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430070,China;College of Power and Energy Engineering,Harbin Engineer-ing University,Harbin 150001,China)

机构地区：[1]中国舰船研究设计中心,湖北武汉430064 [2]武汉理工大学船海与能源动力工程学院,湖北武汉430070 [3]哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2024年第9期1725-1734,共10页Journal of Harbin Engineering University

基　　金：国家重点研发计划(2022YEF0203700);中央高校基本业务费(3072022JC0302).

摘　　要：针对粗糙度对隔离段性能影响,本文开展了不同粗糙度大小、不同粗糙度分布对相同背压下隔离段内激波串发展以及对隔离段出口气流参数影响的数值计算。隔离段进口马赫数2.0,总压0.82 MPa,总温840 K。研究结果表明:与光滑壁面相比,整体布置粗糙度时,边界层转捩提前,激波串起始位置向上游移动,隔离段出口气流参数下降;当粗糙带布置在50S时,随着粗糙度的增加,激波串起始位置后移;当粗糙带布置在70S时,随着粗糙度的增加,隔离段出口气流总压恢复系数升高。因此,合理布置粗糙度位置及大小能够使隔离段具有更优的性能。In this paper,to study the effect of roughness on the performance of an isolator,numerical simulations of roughness sizes and roughness distribution effects on the development of shock train and airflow parameters at the i-solator exit were conducted under the same back pressure with an isolator inlet Mach number of 2.0,a total pres-sure of 0.82 MPa,and a total temperature of 840 K.The results showed that,compared with a smooth wall,when the overall roughness was arranged,the transition of the boundary layer was advanced,the initial position of the shock wave train moved upstream,and the airflow parameters at the outlet of the isolator decreased.When the roughness zone was arranged at 50S,with the increase in roughness,the initial position of the shock wave train moved backward.When the rough zone was arranged at 70S,with the increase in roughness,the recovery coeffi-cient of the total pressure at the outlet of the isolator increased with the increase in roughness.Therefore,reasona-ble placement of roughness location and size allows the isolator to have a better performance.

关 键 词：隔离段 气动性能 粗糙度 流动控制 边界层转捩 激波 流动损失 数值计算 

分 类 号：TK472[动力工程及工程热物理—动力机械及工程]