不同送风方式下冷风侵入的动态变化过程  

Dynamic Process of Cold Air Invasion under Different Air Supply Modes

作　　者：袁泽安 叶筱[1,2] 亢燕铭 钟珂[1] YUAN Ze an;YE Xiao;KANG Yanming;ZHONG Ke(College of Environmental Science and Engineering,Donghua University,Shanghai 201620,China;College of Mechanical and Automobile Engineering,Shanghai University of Engineering Science,Shanghai 201620,China)

机构地区：[1]东华大学环境科学与工程学院,上海201620 [2]上海工程技术大学机械与汽车工程学院,上海201620

出　　处：《东华大学学报（自然科学版）》2020年第3期435-441,共7页Journal of Donghua University(Natural Science)

基　　金：国家自然科学基金资助项目(51578121)。

摘　　要：采用数值模拟的方法,对比研究了碰撞射流通风(impinging jet ventilation,IJV)与混合通风(mixing ventilation,MV)供暖情况下冷风侵入时室内热环境的动态变化。结果表明:相比IJV供暖房间,MV供暖房间室内会在高度方向形成明显的热力分层现象,因此IJV的供暖能量系数明显高于MV;IJV和MV供暖房间近门处的气温受外门启闭的影响均会出现周期性波动,但是IJV供暖房间的冷风侵入范围和强度均远小于MV供暖房间。This paper studied the dynamic changes of indoor thermal environment in the case of cold air invasion under impinging jet ventilation(IJV)and mixing ventilation(MV)with the numerical simulation method.The results indicate that the MV heating indoor room forms a significant thermal stratification in the height direction compared with IJV,resulting in a significantly higher heating energy coefficient of IJV than that of MV.The temperature of observation points inside the intrusion zone periodically fluctuates due to the opening and closing of external doors whether in the IJV or MV heating room.However,the range and intensity of cold air invasion in IJV heating rooms are much smaller than that of the MV heating room.

关 键 词：碰撞射流通风 混合通风 热力分层 冷风侵入 

分 类 号：TU831.6[建筑科学—供热、供燃气、通风及空调工程]