实验研究具有单面垂直热源室内自然置换通风热力分层特性.pdfVIP

实验研究具有单面垂直热源室内自然置换通风热力分层特性 宋丹萍∗ 刘泽勤 （天津商业大学机械工程学院，天津 300134 ） 摘要：用气泡模型模拟具有单面垂直热源的室内自然置换通风的热力分层变化特性。从理论上对气泡模型 与自然置换通风原型之间的相似性进行了论证，同时分析有效通风面积对自然置换通风热力分层高度的影 响。实验分析结果表明，室内的有效通风面积越大，室内自然置换通风热力分层高度越高，在热力分层附 近。有卷吸和反卷吸的现象出现，卷吸现象发生在热力分层之下与环境空气的接触面上，反卷吸现象发生 在热力分层之上与室内空气混合的部分。 关键词： 自然置换通风 单面垂直热源 热力分层 气泡模型 EXPERIMENTAL RESEARCH ON CHARACTERISTIC OF THE THERMAL STRATIFICATION INDUCED BY A VERTICAL SINGLE-SIDED HEAT SOURCE IN NATURAL DISPLACEMENT VENTILATED ROOM Danping Song Zeqin Liu (Mechanical Engineering College, Tianjin University of Commerce, Tianjin, 300134) Abstract: Bubble model is used to simulate the variable characteristic of the thermal stratification induced by a vertical single-sided heat source in natural displacement ventilated room. Verifies the similarly between the bubble model and natural displacement prototype in theory, at the same time, analyzes the influence of the effect ventilated area on the natural displacement ventilation thermal stratification height. The experimental analysis shows that the height increases as the effect ventilated area becomes larger, and the entrainment and de-entrainment happen next to the thermal stratification interface. The entrainment occurs below the interface between the thermal stratification and the environmental air, and the de-entrainment occurs at the mixing part with the indoor air above the thermal stratification. Keywords: Natural Displacement Ventilation Single-Sided Vertical Heat Source Thermal Stratification Bubble Model ∗基金项目：天津市外国专家局引进国外技术、管理人才项目计划（Y2006038）资助。 作者简介：宋丹萍，女，（1983－），硕士生，sdanping@，主要从事人工环境控制研究。 进行观察和比较受环境参数影响的单面受热墙体 0 引言 热力分层特征等[18] 。 随着我国经济