多微通道式气体静压节流器性能初探

Research on the Performances of Aerostatic Restrictor with Multi-Microchannels

气体静压节流器的刚度与稳定性之间是一对矛盾。为提升节流器气膜刚度并保证流场稳定,设计并制作了多微通道式气体静压节流器。利用FLUENT及TECPLOT软件分析该节流器内部流场及压力分布,调整供气压力,结合实验参照组,对该节流器进行静态性能测试实验,得到承载力与气膜刚度的比较曲线。仿真结果表明,该节流器具有渐变、稳定的内部气膜流场。实验结果表明,外形尺寸为φ80mm×20mm的多微通道式气体静压节流器在供气压力为0.5MPa时可测得最大承载力与气膜刚度,且最大承载力为708.4N,最大气膜刚度值为59.236N/μm。静态性能整体优于被测的其他节流器。

The contradiction between the air film stiffness and the stability of the aerostatic restrictor has been long-existed.In order to improve the air film stiffness and the stability simultaneously,the aerostatic restrictor with multi-microchannels（hereinafter referred to as MMAR）was designed and made.The air flow and pressure distribution inside the aerostatic restrictor were analyzed using the FLUENT and TECPLOT software.Static performances for aerostatic restrictor controls were tested under different air source pressure,and the figures of bearing capacity and air film stiffness were obtained.The simulations show that the aerostatic restrictor has gradually changing characteristcs and stable inner air flow.The experimental results show that the aerostatic restrictor,φ80mm×20mm,has the biggest bearing capacity,708.4N,and the largest air film stiffness,59.236N/μm,when the air source pressure was 0.5MPa.Totally,the aerostatic restrictor has better performance than other controls.