喷射火双向人工扰流脱火的可控参数试验研究

Experimental Study on Controllable Parameters of Two-direction Artificial Interference Flows against Jet Fire

为解决喷射火单向人工扰流脱火方法效率低的问题,设计并制作喷射火双向人工扰流脱火方法试验装置,分析扰流流量、入射角度、入射高度和入射距离等4个主要可控参数对脱火距离的影响。结果表明:随着扰流流量的增加,脱火距离呈现先增大再减小的趋势;水平面扰流夹角逐渐增大时,脱火距离先增大再减小,竖直面入射夹角逐渐增大时,脱火距离逐渐减小;入射高度为-2～2 mm时脱火距离较大,超出此范围后脱火距离迅速减小;扰流流量不变时,随着入射距离的增大,脱火距离有逐渐增大的趋势。合理设定双向人工扰流的可控参数,有助于提高脱火效能。

In order to overcome low efficiency of one-direction artificial interference flow method for extinguishing jet fire, an experimental device, for researching two-direction artificial interference flows method, was designed and made. The effects of flow, angle, height and distance of interference flows on the lift-off distance were studied. The results show that lift-off distance increases firstly then decreases with the flow increase of interference flows, that with included angle of horizontal plane increasing gradually, lift-off distance firstly increases and then decreases, that with incidence angle of vertical plane increases, lift-off distance decreases, that when the incidence height is -2 -2 ram, lift-off distance is larger but it decreases quickly out of this range, that with the inteference flow rates being kept constant,lift-off distance increases with the increase of incidence distance, and that reasonable setting of the controllable parameters is helpful in improving the lift-off efficency.