粗糙壁面Rayleigh-Bénard湍流热对流研究进展  

Progresses in turbulent Rayleigh-Bénard convection over rough surfaces

作　　者：朱旭 张义招 周全[1] 孙超 ZHU Xu;ZHANG Yi-Zhao;ZHOU Quan;SUN Chao(Shanghai Institute of Applied Mathematics and Mechanics and Shanghai Key Laboratory of Mechanics in Energy Engineering,Shanghai University,Shanghai 200072,China;Center for Combustion Energy and Department of Thermal Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]上海大学上海市应用数学和力学研究所,上海市力学在能源工程中的应用重点实验室,上海200072 [2]清华大学燃烧能源中心和能源与动力工程系,北京100084

出　　处：《中国科学：物理学、力学、天文学》2018年第9期164-171,共8页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金(编号：11572185,11672156,1173201)资助项目

摘　　要：粗糙壁面湍流广泛存在于自然界和工程技术等诸多领域,对其深入研究具有重要的理论价值和现实意义,既可以帮助揭示湍流边界层中的结构生成和动力学过程,又与很多实际应用息息相关.本文主要关注RayleighBénard湍流热对流这一典型的封闭湍流系统,着重评述了近年来粗糙壁面热对流领域内的若干研究新进展,包括粗糙壁面如何增强/减弱系统的整体热输运效率、粗糙壁面是否有利于终极区间的实现等.最后,对今后的研究工作进行展望.粗糙壁面对湍流输运的影响需要更进一步对边界层精细测量研究,粗糙壁面所引发羽流等湍流结构的生成和分离,与大尺度环流的单涡流动结构和多涡流动结构演化发展研究相对较少,粗糙元几何结构导致对称性流动结构的影响研究仍需更深入的探讨.Turbulent convection over a rough surface is a common scenario that one often encounters in nature and in many industrial processes. It is of great interest and especially useful to reveal the properties of this type of flow. In this paper, we present an overview of recent progresses in turbulent Rayleigh-B6nard convection over rough surfaces, including how surface roughness enhances/reduces the global heat transfer through the system, whether roughness could be used as a route to the ultimate regime of thermal convection. We also point out the main remaining issues and challenges and giving an outlook on the future development. Rough surface to affect the turbulent transport need to further research, based on exquisite measurement of boundary layers. Rough surface causes plumes generating and separating, and at the same time evolution of one-roll state and multi-roll state in the large scale circulation, is seldom studied. Structure of rough surface lead to symmetry influence on flow structure, which requires further probe.

关 键 词：湍流热对流 粗糙壁面 湍流输运 

分 类 号：O357.5[理学—流体力学]