窄间隙矩形通道单相水纵向涡强化传热实验  

Experimental Investigations on Single-Phase Heat Transfer Enhancement in a Narrow Rectangular Channel with Longitudinal Vortex

作　　者：马建[1,2] 黄彦平[1] 黄军[1,2] 

机构地区：[1]中国核动力研究设计院中核核反应堆热工水力技术重点实验室,成都610041 [2]西安交通大学动力工程多相流国家重点实验室,西安710049

出　　处：《核动力工程》2011年第1期89-94,共6页Nuclear Power Engineering

基　　金：2005年度国家自然科学基金(50576089);2006年度空泡物理和自然循环重点实验室基金(9140C7101030602)

摘　　要：在窄间隙矩形通道内设置4对周期性分布的矩形块纵向涡发生器(LVG),研究该类通道和光通道内单相水介质流动阻力特性和对流传热特性。在雷诺数Re为310～4220范围内,纵向涡(LV)使得通道内流动提前由层流向紊流转化。在层流区,LV强化传热可达100.9%,摩擦阻力增大仅11.4%;在紊流区,LV强化传热可超过87.1%,摩擦阻力增大100.3%。LV可明显强化单相水传热,并引起摩擦阻力一定程度的增加。Four pairs of rectangular block as longitudinal vortex generators（LVG） were mounted periodically in a narrow rectangular channel to investigate the fluid flow and convective heat transfer respectively in the narrow rectangular channel with LVG and without LVG.The experiments were performed with the channels oriented uprightly and uniform heat fluxes applied at the one side of the heating plate and single-phase water was used as test fluid.In these experimental investigations,both laminar regime and turbulent regime were under the thermo-hydraulic developing conditions,laminar-to-turbulent transition occurred in advance with the help of LV when Reynolds numbers vary between 310 and 4220.In laminar regime,LV causes heat transfer enhancement of about 100.9% and flow resistance increase of only 11.4%. And in turbulent regime,LV causes heat transfer enhancement of above 87.1% and flow resistance increase of 100.3%.As a result,LV can obviously enhance the heat transfer of single-phase water,and increase the flow resistance mildly.

关 键 词：窄间隙矩形通道 单相水 纵向涡 强化传热 

分 类 号：TK124[动力工程及工程热物理—工程热物理]