基于N-S方程的多孔质气膜悬浮力学模型研究

发布时间：2018-03-26 00:44

本文选题：流体力学　切入点：多孔质　出处：《计算力学学报》2016年06期

【摘要】：为了研究多孔质气浮承载系统设计参数对气膜厚度的影响特性,以平行圆板模型为对象,建立了包含多孔质特性和缝隙流特性的气膜悬浮静态模型,分析了承载系统多孔质部分的受力特性,得出了气膜厚度控制方程,并利用改进弦截法进行求解。理论计算和实验结果对比表明,基于气膜简化模型的数值计算结果与实验值吻合较好,验证了理论模型的有效性。通过数值计算结果,探讨了通气量和承载力变化对气膜厚度的影响规律。研究表明,气膜厚度受通气量及承载力的影响,可通过对通气量及承载力进行最优控制,以使气膜厚度满足环境使用要求。
[Abstract]:In order to study the influence of the design parameters of porous air bearing system on the film thickness, a static film suspension model with porous characteristics and slot flow characteristics was established by taking the parallel circular plate model as an object. In this paper, the mechanical characteristics of the porous part of the bearing system are analyzed, the governing equation of the film thickness is obtained, and the modified chord section method is used to solve the problem. The theoretical calculation and the experimental results show that, The numerical results based on the simplified gas film model are in good agreement with the experimental data, which verifies the validity of the theoretical model. Through the numerical calculation results, the effects of the variation of aeration volume and bearing capacity on the film thickness are discussed. The thickness of the film is affected by the ventilation volume and the bearing capacity, which can be optimally controlled to make the film thickness meet the requirements of the environment.
【作者单位】：北京机械设备研究所;
【分类号】：O302

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