Three-dimensional RNG κ-ε Numerical Simulation on Indoor Air Pollutant Discharging by Natural Ventilation in Multi-hatch Room
In order to improve the discharging effect by natural ventilation, indoor air pollutant discharging laws are studied in multi-hatch room by numerical simulation. By using RNG κ-εturbulence model, numerical simulation is performed of the indoor air pollutant discharging process by natural ventilation of a whole set room in three conditions: 1) all vents are open simultaneously; 2) one discharging vent is closed; 3) the other discharging vent is closed. Data of flow field and pollutant mass fraction field are obtained. The results of simulation indicate that: by natural ventilation, pollutant discharging is easy in main flow zone but slow in return flow zone; for multi-hatch room, whether the directions of its depth and main flow of flow field are the same determines size of return flow zone and further determines velocity of pollutant discharging; Multi-hatch rooms have higher flow speed and smaller in back flow zone than single-hatch rooms, the speed of indoor air pollutant s dilution in multi-hatch rooms is 3～9 times that of single-hatch rooms. Among three ventilation conditions, the discharging effect is the best in given time when all the vents are open.
Indoor air pollutant RNG κ-ε numerical simulation Natural ventilation Mass fraction
Fankang Meng Jue Wang Minghui Yan Shan Gao
College of Architecture and Engineering,Liaoning Technical University,FuXin,China
国际会议
The 6th International Symposium on Heating,Ventilating and Air Conditioning(第六届国际暖通空调学术会议)
南京
英文
1095-1100
2009-11-06（万方平台首次上网日期，不代表论文的发表时间）