Analysis of the factors influencing the airflow behavior in an impinging jet ventilation room
作者机构：School of Environmental Science and EngineeringDonghua UniversityShanghai201620China School of HydraulicEnergy and Power EngineeringYangzhou UniversityYangzhou225127China School of Mechanical and Automobile EngineeringShanghai University of Engineering ScienceShanghai201620China
出 版 物：《Building Simulation》 (建筑模拟（英文）)
年 卷 期：2021年第14卷第3期
页 面：749-762页
核心收录：
学科分类：08[工学] 0807[工学-动力工程及工程热物理] 081404[工学-供热、供燃气、通风及空调工程] 0813[工学-建筑学] 0814[工学-土木工程]
基 金：supported by the National Natural Science Foundation of China(No.51278094 and No.51478098) the Innovation Foundation of Shanghai Education Commission(No.13ZZ054) the Natural Science Foundation of Jiangsu Province,China(No.BK20161336)
主 题：impinging jet ventilation heating scenario airflow behavior draught discomfort
摘 要：A validated CFD model is employed to predict the airflow behavior in an impinging jet ventilation(IJV)room with cool,isothermal or warm *** using the numerical results,the influences of jet discharge height,supply grille shape and room height on the jet flow behavior as well as the draught discomfort are analyzed for IJV operating in heating *** results indicate that the warm supply jet of IJV rises upward to the ceiling after spreading along the floor for a certain distance due to thermal buoyancy,resulting in a limited dispersion area,while the cool and isothermal jets of IJV always spread along the whole *** IJV is used for space heating,the lower the jet discharge height,the farther the supply air spreads along the floor,and the supply grille shape and room height almost have no effect on the air dispersion *** results also show that the energy-efficient advantage of IJV in its heating mode compared to the mixing ventilation(MV)system is more remarkable in higher ***,there is a risk of draught discomfort in IJV heating rooms and it is recommended to wear socks to avoid this discomfort.
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