含有同一高度相近点热源的置换式自然通风房间热分层流动研究
摘要：研究了自然通风房间内同一高度的2个相近点热源对房间热分层流动的影响。基于等强度点热源羽流耦合扩散规律，推导得出同一高度相近点热源房间的热分层高度计算模型，并分析了热源距地板高度、风口面积等因素对热压自然通风的影响。研究表明：随着热源高度增大或当量有效孔口面积增大，量纲一热分层高度增大；随着热源高度增大，房间热分层高度的上、下限值增大；两热源独立的量纲一阈值随着热源高度增大而减小，随着当量有效孔口面积增大而增大。
关键词：自然通风热分层点热源双热源热羽流热源高度风口面积
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[11] LINDEN P F,LANESERFF G F,SMEED D A.Emptying filling boxes:the fluid mechanics of natural ventilation[J].Journal of fluid mechanics,1990,212:309- 335.
Study on stratified thermal flow in a displacement naturally ventilated room with two interacting point heat sources at the same height
Abstract: This paper studies the influence of two interacting point heat sources at the same height on the stratified thermal flow in a naturally ventilated room. Based on the coupled diffusion law of two interacting plumes of equal strength, the calculation model of thermal stratification height in a naturally ventilated room with two interacting point heat sources at the same height is deduced, and the influences of the height of the heat sources from the floor, opening area and other factors on thermal natural ventilation are analysed. The results show that the dimensionless thermal stratification height increases with the increase of heat source height or equivalent effective opening area. The upper and lower limits of thermal stratification height increase with the increase of heat source height. The independent dimensionless threshold of two heat sources decreases with the increase of heat source height and increases with the increase of equivalent effective opening area.
Keywords: natural ventilation; thermal stratification; point heat source; double heat source; thermal plume; heat source height; opening area;
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