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首页> 外文期刊>Numerical Heat Transfer, Part B. Fundamentals: An International Journal of Computation and Methodology >Numerical prediction of dispersion and evaporation of liquid sprays in gases flowing at all speeds
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Numerical prediction of dispersion and evaporation of liquid sprays in gases flowing at all speeds

机译：全速流动的气体中液体喷雾的分散和蒸发的数值预测

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This work is concerned with the formulation, implementation, and testing of an all-speed numerical procedure for the simulation of turbulent dispersion and evaporation of droplets. The pressure-based method is formulated, for both the discrete and continuous phases, within a Eulerian framework following a finite-volume approach and is equally applicable in the subsonic and supersonic regimes. The two-equation k-epsilon turbulence model is used to estimate turbulence in the gas phase with modifications to account for compressibility at high speeds, while an algebraic model is employed to predict turbulence in the discrete phase. Two configurations involving streamwise and cross-stream injection are investigated, and solutions for evaporation and mixing of droplets sprayed into subsonic and supersonic streams are generated over a wide range of operating conditions. Results, displayed in the form of velocity vector fields and contour plots, reveal the degree of penetration of the injected droplet into the gas phase, and the rate of evaporation as a function of inlet gas temperature, inlet droplet temperature, and/or length of the domain.
机译：这项工作涉及用于模拟湍流扩散和液滴蒸发的全速数值程序的制定，实施和测试。在欧拉框架内，采用有限体积方法，针对离散相和连续相都采用了基于压力的方法，该方法同样适用于亚音速和超音速状态。二方程kε湍流模型用于估算气相的湍流，并进行了修改以考虑高速下的可压缩性，而采用代数模型来预测离散相的湍流。研究了涉及流向和横流注入的两种配置，并在广泛的操作条件下生成了用于喷雾和混合喷射到亚音速和超音速流中的液滴的解决方案。结果以速度矢量场和等高线图的形式显示，揭示了注入的液滴渗透到气相中的程度以及蒸发速率与入口气体温度，入口液滴温度和/或长度的关系。域。

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