【摘要】 针对特种车辆内燃机上广泛使用的由旋风分离器和油浴过滤器组成的二级空气滤清器工作环境含尘量或含砂量大、使用寿命短的问题，提出利用气体动力学和计算流体力学的理论来选择旋风分离器的结构参数，提高旋风分离器的分离效率。文中用Ｎ－Ｓ方程和两方程模型来预测旋风分离器的流场。计算中采用零方程模型确定初始的涡粘系数的分布，用低雷诺数模型计算近壁区的流场，用高雷诺数模型计算紊流旺盛区的流场，得到了与实测值相吻合的计算结果更多还原

【Abstract】 The large dust content in the environmental of the two stage filter used on special vehicle which consists of cyclones and oil bath air cleaner results in the short service life of the filter,so the select method was put forward by use of aerodynamics and computational fluid mechanics for increasing the separating efficiency of the filter in this paper.The N S Equations and k ξ model were raised for calculating the cyclone flow field.In the process,mean velocity field model was used to compute the initial values of turbulent viscosity coefficient,k ε low Reynolds number model was for calculating the region near the wall,and high Reynolds number model was used for calculating the high turbulent region.The computational results are almost same with the experimental data.更多还原