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Breakup Simulation of Elliptical Liquid Jet in Gaseous Crossflow

机译:椭圆形液体射流在气体横流中的破裂模拟

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Numerical study of elliptical liquid jets in cross flow is performed, using the Volume of Fluid (VOF) method coupled with Large Eddy Simulation (LES) turbulence model. Several elliptical geometries with different aspect ratios, i.e. 0.25-4, including the cylindrical shape, were considered as the liquid jet nozzle exit. The simulations were performed with relative gas-liquid Weber numbers 18 and 30 which covers the bag and multimode primary breakup regime in crossflow. In addition the liquid to gas momentum ratio is kept at 50 and 100. The results show remarkable changes in liquid shapes before disintegration for different aspect ratios. Also the penetration depth, droplet size distribution and spray spreading angle has been affected by the change of disintegration model.
机译:使用流体体积(VOF)方法与大涡模拟(LES)湍流模型相结合,对横流中的椭圆形液体射流进行了数值研究。几种具有不同长宽比(即0.25-4)的椭圆形几何形状(包括圆柱形状)被视为液体喷嘴出口。用相对气液韦伯数为18和30进行模拟,该数涵盖了横流中的布袋和多模式一次破碎状态。另外,液气动量比保持在50和100。结果表明,对于不同的长宽比,液体形状在崩解之前会发生显着变化。崩解模型的改变也影响了渗透深度,液滴尺寸分布和喷雾扩散角。

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