后向台阶分离流动及强化传热的研究进展

Research Progress on Separated Flow and Enhanced Heat Transfer for Backward-facing Step

阐述了后向台阶流动及传热的特点,分别从分离流场、传热特性两方面对后向台阶流动的国内外研究发展状况进行了综述。后向台阶的流场研究侧重于层流和湍流,对过渡流时的流动特性研究甚少,后向台阶传热特性的研究建立于流动特性分析的基础上;给出了后向台阶传热有待深入研究的三个方向:后向台阶在过渡流状态时的传热、微尺度后向台阶流动的传热、纳米流体流过后向台阶的传热。

The flow and heat transfer characteristics of a backward- facing step was introduced. The research status about backward- facing step at home and abroad was reviewed from separated flow field and heat transfer characteristics,respectively. The research of flow field usually focused on laminar flow and turbulent flow,but especially less on the transitional flow. The research of the heat transfer characteristics was based on the analysis of flow characteristics. Three directions of the heat transfer for backward- facing step required deep- going research： the heat transfer in transitional flow,the heat transfer for microscale backward- facing step,the heat transfer for nanofluid flow through backward- facing step.