双风口空气幕动力特性的流函数法研究
Research on dynamic characteristics of dual-jet air curtains using stream function method
摘要：
用流函数法分析了双风口空气幕隔绝或减轻横向气流穿透的动力特性，并与单风口空气幕的特性进行了比较。分析表明，在同样横向压差作用下，条缝型双射流空气幕抵抗横向压差的能力优于相同射流条件下的单射流空气幕。随着两射流轴心间距增加，双风幕效果迅速提高；当轴心间距增大到某一值之后，双风幕效果缓慢下降；双风幕的动力性能与射流喷射角有关，喷射角应在15°~22°之间。
关键词：双风幕 流函数 轴心间距 喷射角
Abstract：
Analyses the dynamic characteristics of dual-jet air curtains to defend against or reduce the transverse airflow, and compares with those of the single-jet air curtains. The result shows that, with the same jet conditions, the ability of slot dual-jet air curtains to resist the lateral pressure difference is stronger. The effect improves quickly before the spacing of jets increasing to a certain point and gradually declines. And the dynamic characteristic is related to the jet angle which is preferable to be in the range of 15° to 22°.
Keywords:dual-jetaircurtain,streamfunction,spacingofjets,jetangle