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| Experiment and analysis of performance parameters for refraction nozzle in vent wash exhaust hood |
| He Hongqin,Yuan Shouqi,Yuan Jianping,Zhang Jie,Liu Xiaofan |
| (Technical and Research Center of Fluid Machinery Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China) |
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Abstract In order to reduce the effect of cooking fume pollution on environment,the influence on the cooking fume′s cleaning effect of avent wash exhaust hood by the atomizing characteristic of nozzle was discussed.The experiments of the globoidal sector and the angle including 115°,120°,135°,140°,150° of direct sector refraction nozzle were carried out.Several parameters,i.e.,velocity of flow,range of the nozzle,spray area,size of grain,and water distribution for the six refraction nozzles were measured under five pressures.The atomization performance was analyzed.The relations between these parameters were determined.Through the experiments it was found that the inlet pressure is directly proportional to the velocity of flow,range of the nozzle and spray area.The inlet pressure is inversely proportional to the size of grain.The best working pressure of the vent wash exhaust hood is 0.30 MPa.The cooking fume′s clea-ning effect of direct sector is better than globoidal sector refraction nozzle.The angle of 120°was selected for straight refractive nozzle.Its uniformity coefficient,atomization and spray area are the best.
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Received: 24 May 2009
Published: 30 July 2009
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