孔口面积及热源位置对热压通风影响的模拟研究  

Simulation Study of the Influence of Orifice Areas and Heat Source Position on Thermal Pressure Ventilation

作　　者：朱尚斌 李灿[1] 陈泉 ZHU Shangbin;LI Can;CHEN Quan(School of Civil Engineering,Hunan University of Technology,Zhuzhou Hunan 412007,China)

机构地区：[1]湖南工业大学土木工程学院,湖南株洲412007

出　　处：《湖南工业大学学报》2017年第5期39-44,共6页Journal of Hunan University of Technology

基　　金：国家自然科学基金资助项目(51246008);湖南省自然科学基金资助项目(2017JJ4005);湖南省教育厅科研基金资助项目(10C0612)

摘　　要：利用流体力学计算软件Airpak对单热源民用建筑房间的热压通风进行了模拟。给定热源体总热量,在改变上下部孔口面积比例的情况下,分析各模拟情况下室内热压通风的中和面高度、有效热量系数、通风量及排出余热量等特征参数的变化规律;在孔口大小固定的情况下,研究热源体水平位置同孔口间距改变时热压通风的室内温度场、流场、热源表面温度等参数的变化规律。研究结果表明:上下部孔口开口面积相差不大时,房间内的热压通风效率最佳;下部孔口面积略大于上部孔口面积时,有效热量系数m处于较低的范围内,且增大某一孔口面积,中和面会朝着该孔口方向移动;热源体越靠近下部孔口,越有利于热源散热。A simulation study has been made by CFD software Airpak of the thermal pressure ventilation of civil buildings with single heat source.With the total calories of the heat source given,and with the area ratio of the upper and lower orifices changing,a thorough analysis has been made of the variation law of such parameters as the height of the neutral surface,the coefficient of effective heat,ventilation rate and residual heat of the thermal pressure ventilation.With the orifice size fixed,a study has been made of the variation of temperature field,flow field,heat source,surface temperature and other parameters of hot pressing ventilation when the horizontal position of heat source changes with the distance between the orifices.Results show that when the top and bottom orifice open areas are similar,the room will have the best thermal pressure ventilation efficiency;when the bottom open area is greater than the top one,the effective heat coefficient m will change at a low range,and with an increase in the area of an orifice,the neutral plane will move toward the greater area orifice.The closer the heat source to the lower orifice,the higher the heat dissipation efficiency will be.

关 键 词：热压通风 中和面 有效热量系数 热源体温度 

分 类 号：TU834.1[建筑科学—供热、供燃气、通风及空调工程]