By using numerical simulation and field test method, air movement, temperature distribution and pollutant dispersion were investigated, when air was supplied through slot air curtain into the residential kitchen. The influence of jet velocity from air curtain on pollutant dispersion inside the kitchen was analyzed, where the range of jet velocity was from 0to 5m/s. Results show that oil fume generated by cooking cannot be effectively exhausted out of the kitchen by using the range hood alone. With the application of air curtain, the air temperature can be reduced to improve human thermal comfort, and the pollutant concentration can be decreased with the improved air distribution. However, with the given exhaust air volume, there was an optimal designed air supply velocity for the air curtain, since the capture efficiency of the range hood was not proportional to the air supply velocity. The optimal air velocity of the air curtain was 0.6m/s when the exhaust rate was 5m/s. Air velocity from air curtain should be correspondingly adjusted with the exhaust air rate, so that the capture efficiency of the range hood can be improved accordingly.
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