Gas Flow-Field Numerical Simulation and Capture Effect of Up-suction Hood
- VernacularTitle:上吸罩流场数值模拟及其控制效果分析
- Author:
Jian-Zhong GUO
;
Jin-Ling BAO
;
- Publication Type:Journal Article
- Keywords:
Up-suction hood;
Numerical simulation;
Collection efficiency
- From:
Journal of Environment and Health
2007;0(09):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the relationship of the collection efficiency and physical parameters,such as the height of exhaust hood,baffle,ventilation conditions of these parameters on the effect of control.Methods The computational fluid dynamics software FLUENT was used to form the model,and to maximize production in line with the actual operating conditions for physics experiments,to take air numerical simulation and physical model of re-testing the method of combining.Results Without the lagging conditions,the air flow system should be chosen 1 320 m~3/h,with the lagging conditions,the air flow system should be chosen 1 078 m~3/h.The system in a certain air volume,lower installation height could increase the average wind speed of breathing zone.At a certain suction cover installation height and air flow,the baffle could improve the collection efficiency.Without the baffle,the collection efficiency and control distance(dimensionless)showed a relation of cubic polynomial.Conclusion The physical parameters of suction on the hood may impact the collection efficiency at breathing zone measuring point.
