静压空气平面轴承节流器阵列的三维CFD仿真  

Three-dimensional CFD Simulation of Flat Pad Aerostatic Bearing with Orifice Array

作　　者：杨涛[1] 陈改革[1] 韩宾[1] 李磊民[2] 

机构地区：[1]西南科技大学信息工程学院,绵阳621010 [2]西南科技大学国防科技学院,绵阳621010

出　　处：《系统仿真学报》2011年第12期2709-2714,共6页Journal of System Simulation

基　　金：国家科技平台条件建设项目(2005DKAl0100);四川省教育厅重大培育项目(07ZZ038)

摘　　要：基于FLUENT实现了同孔径等间距孔式节流器阵列的三维CFD仿真,得到了七种阵列(1×1、2×1、2×2、3×2、3×3、4×3、4×4)的质量流量、气膜压力分布、速度分布等关键性能参数。不同节流器阵列的仿真数据表明:总质量流量与节流器个数成比例,但各个节流器的质量流量不完全相等;在一定范围内增大节流器个数可以显著提高气浮垫的平均气膜压力即承载能力。从气膜压力和速度关于位置坐标的累积分布曲线分别得到阵列气膜区压力、气体速度的耦合关系。仿真结果不仅能指导静压空气平面轴承的优化设计,而且可用于辨识多节流器阵列气膜压力和气体速度分布等理论模型。The performance of orifice arrays with equal diameter and equal spacing was analyzed using FLUENT,a 3D CFD solver,and the mass flux,pressure distribution and velocity distribution of the air films in seven different orifice arrays were obtained.Simulation data indicates that total mass flux is proportional to the number of orifices though the mass fluxes of all orifice are not equal,and that the average air film pressure and carrying capacity increase significantly with increasing orifice numbers within a certain range.The coupling of multiple orifices can be observed from the accumulative distribution curves of pressure and velocity in the air film.The simulation results can serve to guide the optimization of flat pad aerostatic bearings,and to identify theoretical models of pressure and velocity distribution of air films in multi-orifice arrays.

关 键 词：静压空气平面轴承 节流器阵列 计算流体力学(CFD) 气膜 压力分布 速度分布 

分 类 号：V211[航空宇航科学与技术—航空宇航推进理论与工程] TH117[机械工程—机械设计及理论]