竖直平板自然对流强化换热的实验

Experimental study in natural convection heat transfer enhancement

National Key Laboratory on Aero-Engines, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

摘要: 研究各种强化换热结构对竖直平板自然对流换热的强化作用.通过比较圆柱扰流、圆锥扰流、三棱柱扰流、三棱锥扰流、四棱柱扰流、四棱锥扰流和直角三角翼纵向涡发生器LVG(Longitudinal vortex gener-ator)等对自然对流换热的强化效果,发现:单种换热结构中直角三角翼纵向涡发生器的强化换热效果最好,组合结构中直角三角翼叉排与圆柱扰流的混合排列换热效果最好,其能将竖直平板自然对流换热效果提高24.%.
- 航空、航天推进系统 /
- 自然对流 /
- 强化换热 /
- 实验研究
Abstract: This paper focuses on study of heat transfer enhancement in natural convection along upright board.Comparing the different effects of heat transfer enhancement by using columned turbulent pins,conical turbulent pins,prisms,pyramids,and LVG(longitudinal vortex generator) arrays,the results show that the performance of LVGin heat transfer enhancement is better than others during simplex pins tests.Furthermore,the mixed configuration of columned turbulent pins and LVGhas the best performance in natural convection heat transfer enhancement,which enhances heat transfer by 24.5 percent.
- aerospace propulsion system /
- natural convection /
- heat transfer enhancement /
- experimental study

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