The study of elliptical liquid jets in supersonic flow in a Mach 2.0 is performed numerically. The primary breakup process of the elliptical liquid jet is simulated for a Weber number 223, liquid/gas flux momentum 4.0. The aspect ratios of elliptical geometries are set to be 0.25, 0.5, 1, 2, and 5. The results show a remarkable difference in liquid jet disintegration morphology at different aspect ratios. Under supersonic crossflow conditions, the elliptical liquid jet shows more breakup characteristics than the round liquid jet. As the aspect ratio grows, the penetration depth decreases. The elliptical liquid jet with has the largest penetration depth in all cases. Moreover, the round jet has a maximum spreading angle of 50.2°. The changing trends of the column breakup length both direction and direction are similar. The elliptical jet at a lower aspect ratio has a shorter breakup length due to the narrower windward area. The liquid jet has a pair of larger horseshoe vortex structure and a wider wake region at a higher aspect ratio. Two pairs of reversal vortex pairs with obvious characteristics can be observed in all the simulations.

中文翻译：

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超声速横流中椭圆形液体射流一次破裂的模拟

对马赫数为2.0的超声速流动中的椭圆形液体射流进行了数值研究。椭圆形液体射流的一次破碎过程是针对韦伯数223，液/气通量动量4.0进行模拟的。椭圆几何形状的长宽比设置为0.25、0.5、1、2和5。结果显示，在不同长宽比下，液体射流崩解形态具有显着差异。在超声速横流条件下，椭圆形液体射流比圆形液体射流显示出更多的破裂特性。随着长宽比的增加，穿透深度会减小。椭圆形液体射流在所有情况下都具有最大的穿透深度。此外，圆形射流的最大扩展角为50.2°。色谱柱破裂长度方向和方向的变化趋势相似。较低长宽比的椭圆形射流由于迎风区域较窄而具有较短的破裂长度。液体射流具有一对较大的马蹄形涡流结构和一个较高的纵横比的较宽的尾流区域。在所有模拟中都可以观察到两对具有明显特征的反向涡旋对。