碰撞射流通风房间与置换通风房间的新风可及性比较  

A Comparative Study of Accessibility of Supply Air Between Impinging Jet Ventilated Room and Displacement Ventilated Room

作　　者：贺鸣[1] 亢燕铭[1] 左滨[1] 钟珂[1] 

机构地区：[1]东华大学环境科学与工程学院,上海201620

出　　处：《东华大学学报（自然科学版）》2015年第5期676-681,688,共7页Journal of Donghua University(Natural Science)

基　　金：国家自然科学基金资助项目(51278094);上海市教委科技创新重点资助项目(13ZZ054)

摘　　要：采用经过试验验证合理性的数值计算方法,使用数值模拟比较了碰撞射流通风房间与置换通风房间中人体附近的气流状况,并比较了人体附近的新风可及性.研究结果表明:气流受浮力控制的程度不同导致两种通风方式房间内人体附近新风可及性差异;送风初期,碰撞射流通风房间人员附近新鲜空气分布比置换通风房间均匀但可及性略小;在置换通风房间中,人体表面至送风口的距离和与送风方向的关系会影响送风初期的新风可及性.Numerical simulations have been carried out for comparing the accessibility of supply air and the air distribution around the occupants between impinging jet ventilated room and displacement ventilated room,and the numerical scheme is validated by test data.The results show that the accessibility of supply air around the occupants is different between impinging jet ventilated room and displacement ventilated room,which is caused by different levels of buoyancy control airflow.At the early stage impinging jet ventilated room has more uniformed fresh air distribution around the occupants than the displacement ventilated room,however the accessibility of supply air in impinging jet ventilated room is slightly lower than that in displacement ventilated room.In displacement ventilated room,both distance and angle between the occupantssurface and the air supply outlet will affect the accessibility of supply air at the early stage of ventilation.

关 键 词：碰撞射流通风 置换通风 新风可及性 热羽流 

分 类 号：TU831.3[建筑科学—供热、供燃气、通风及空调工程]