波状粗糙壁模型流动的壁面热流和阻力关联关系的数值研究  

Numerical study of the relationship between heat flux and drag in the flow on wavy rough-wall

作　　者：李玉川 鲍麟 LI Yuchuan;BAO Lin(School of Engineering Science,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院大学工程科学学院

出　　处：《中国科学院大学学报（中英文）》2019年第6期736-744,共9页Journal of University of Chinese Academy of Sciences

基　　金：国家自然科学基金(11572319)资助

摘　　要：微粗糙壁面上高速气流的流动和传热特性是当前关注的问题。以半无穷长正弦波状板作为微粗糙壁面模型,使用OpenFOAM程序,数值研究不同来流参数和不同波幅的正弦波状板流动。结果表明,在波状壁流动中,壁面热流系数CQ与总阻力系数CD呈现出直接关联,CQ/CD是表征粗糙壁流动与传热特性的关键参数。对于附着型流动,CQ/CD仅取决于粗糙度与边界层厚度之比,即等效粗糙度h;而流动产生分离后,CQ/CD不再随粗糙度变化,仅与波状板相似变化后的位置参量有关。This study focuses on the flow and heat transfer characteristics of high-speed airflow over the rough-wall which has periodic roughness and small amplitude.By using the OpenFOAM program,flows on the semi-infinite sinusoidal wavy plates under different inflow conditions are numerically studied.The results show that there is a direct correlation between the wall heat flux coefficient CQ and the total drag coefficient CD.For the attached flow,CQ/CD only depends on the equivalent roughnessh,which is the ratio of the roughness to the thickness of the boundary layer.When the flow separation occurs,CQ/CD no longer changes with roughness and only depends on the position variablex,which is defined by the similar transformation.

关 键 词：波状粗糙壁 高速流 热流-阻力系数比 

分 类 号：O354.4[理学—流体力学]