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Numerical Simulation of Sand Erosion Phenomena in a Particle Separator

机译:颗粒分离器中沙粒侵蚀现象的数值模拟

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Erosive actions of solid particles within a flow field are very important in a great number of engineering applications such as aircraft, ship, turbo-machinery and so on, which is referred to "sand erosion". We have developed the numerical method to predict sand erosion phenomenon and the temporal change of the eroded surface. Performing iterative computations for the turbulent flow field, the particle trajectories, the mass removed from a wall, and the deformation of the wall, the behavior of sand erosion can be simulated numerically. In the present study, our numerical procedure is applied to the particle separator of a helicopter engine. Several kinds of particles with different diameter and combinations of wall and particle materials are selected to clear the sand erosion phenomena within the separator. Investigating the numerical results, the characteristics of particle motions, the temporal change of wall shape and the reason for the deterioration of separation efficiency are clarified.
机译:在许多工程应用中,例如飞机,轮船,涡轮机械等,流场内的固体颗粒的冲蚀作用非常重要,这被称为“砂蚀”。我们已经开发了一种数值方法来预测砂土侵蚀现象和侵蚀表面的时间变化。通过对湍流场,粒子轨迹,从壁中去除的质量以及壁的变形进行迭代计算,可以数值模拟沙土侵蚀的行为。在本研究中,我们的数值程序被应用于直升机发动机的颗粒分离器。选择几种具有不同直径的颗粒以及壁和颗粒材料的组合以清除分离器内的沙蚀现象。研究了数值结果,阐明了粒子运动的特征,壁形状的时间变化以及分离效率下降的原因。

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