入射角度对喷射火脱火效能的影响分析

为研究入射角度对脱火效能的影响规律,借助THORNTON模型和火焰倾角计算公式对其进行理论分析,并设计专门的实验装置具体研究双向人工扰流入射角度与脱火效能之间的关系。结果表明:在水平面和竖直面两个不同平面内,脱火效能均随着入射角度的改变呈现明显的变化,水平面两扰流夹角120°、竖直面入射对称角30°时的脱火效能最大。合理设置入射角度,有助于提高双向人工扰流的脱火效能。

Analysis of relationship between incidence angle and lift-off efficiency

In order to research the relationship between incidence angle and lift-off efficiency, the effect of incidence angle for lift-off efficiency was analyzed on the foundation of THORNTON model and calculation method for oblique angle of ejecting flame. Relations between TDIF （twodirection man-made interfering jet flows） and lift-off efficiency were researched by experiments with special designed experimental device. The results show that on two different planes, the liftoff efficiency was greatly affected by incidence angle. When the interfering jet flows angle of horizontal plane was 120 degree or the incidence angle of vertical plane was 30 degree, the liftoff efficiency was the largest. It is favorable to increase the reliability of TDIF when the incidence angle is set up reasonably.