论文部分内容阅读
针对带有横向射流的三维超声速流场进行数值模拟,分析了菱形结构喷孔与普通圆孔的差异,并探讨了不同喷射角度下菱形喷孔对流场的影响.研究结果表明:与普通圆孔相比,采用菱形孔射流能够减弱弓形激波的强度、降低总压损失,增加燃料的穿透高度,但是在展向方面两者对于燃料的扩散能力基本相同;随着喷射角度的增加,燃料的穿透高度表现出先增加后降低的趋势,在计算的3种模型中,喷射角为60°表现出更好的特性;喷射角度在一定范围内变化时,总压损失的改变不明显,但是过大的喷射角度会导致总压损失迅速增加.通过研究进一步认识了菱形孔射流的流场特性,为优化喷射装置提供依据.
The numerical simulation of three-dimensional supersonic flow field with transverse jet was carried out, and the difference between diamond-shaped jet hole and ordinary hole was analyzed and the influence of diamond-shaped jet hole on the flow field was discussed. The results show that, Compared with the hole, the diamond hole jet can weaken the strength of the bow shock, reduce the total pressure loss and increase the penetration height of the fuel, but the diffusion ability of the fuel is basically the same in the aspect of orientation. With the increase of the jet angle, The penetration height of the fuel shows a trend of first increasing and then decreasing. In the three models calculated, the injection angle is 60 ° and shows better characteristics. When the injection angle changes within a certain range, the change of the total pressure loss is not obvious, However, when the injection angle is too large, the total pressure loss will increase rapidly.Through further understanding of the flow field characteristics of the diamond-shaped hole jet, it provides the basis for optimizing the jetting device.