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首页> 外文期刊>Engineering Applications of Computational Fluid Mechanics >Rans, detached Eddy simulation and large Eddy simulation of internal Torque converters flows: A comparative study
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Rans, detached Eddy simulation and large Eddy simulation of internal Torque converters flows: A comparative study

机译：内部变矩器流量的跑动，独立涡流仿真和大涡流仿真：比较研究

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Comparative analysis among the capabilities of the RANS, DES, and LES models to predict flow and turbulence distribution was conducted to come up with guidelines for hydraulic torque converter (TC) transient simulation. To ensure the accuracy of calculation, the complex geometry of hydrodynamic elements was accurately represented and the computational meshes of the structured hexahedron were appropriately distributed. Wall shear stress, pressure–streamline structure were analyzed. Compared with RANS, the transient vorticity features, including the birth, development, formation of a scroll; transportation along the blade surface; shedding and rupture at the trailing edge could be clearly captured by the LES and DES models. Rothalpy was used to quantitatively evaluate the hydraulic loss and a new computational formula was proposed to predict the efficiency of each element in TC. After the comparison of relative computing time, DES model was proved be a feasible method for efficiently and accurately simulati...
机译：对RANS，DES和LES模型的功能进行了比较分析，以预测流量和湍流分布，从而为液力变矩器（TC）瞬态仿真提供了指南。为了确保计算的准确性，精确地表示了流体动力元件的复杂几何形状，并适当地分布了结构六面体的计算网格。分析了墙体的剪应力，压力流线结构。与RANS相比，瞬时涡度特征包括涡卷的产生，发展，形成;沿叶片表面运输; LES和DES模型可以清楚地捕获后缘的脱落和破裂。 Rothalpy用于定量评估水力损失，并提出了新的计算公式来预测TC中每个元素的效率。经过相对计算时间的比较，证明了DES模型是一种有效，准确地进行仿真的可行方法。

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