基于CFD的滚动转子压缩机排气阀片性能分析

基于已验证的滚动转子压缩机计算流体动力学(CFD)模型，获得阀片工作的周期性气体载荷，并利用 Workbench软件对排气阀片进行瞬态动力学分析和疲劳寿命预测.分析阀片及阀背板的几何参数对阀片通流面积和寿命的影响，分析得到阀的通流面积和疲劳强度与阀片厚度、阀片特征升程有关.在特定工况下，取阀片厚度为0.305mm，阀片特征升程为2.5mm，兼顾阀片的通流面积和疲劳寿命，得到较理想的性能结果.在此基础上，优化了阀背板型线，优化后的阀片通流面积增加8.63%，最大应力减小107.4MPa.研究结果对滚动转子压缩机排气阀片的设计提供了有效参考和评价方法.

CFD-based Performance Analysis of a Discharge Valve Plate in the Rolling Rotor Compressor

Based on the CFD(computer fluid dynamics) model of the verified rolling rotor compressor， the periodic gas load of the valve plate is obtained， and the transient dynamic analysis and fatigue life prediction of the discharge valve plate are carried out by using the Workbench software. The influence of the geometric parameters of the valve on the flow area and the life of the valve plate is analyzed. It is found that the flow area and fatigue strength of the valve plate are related to the thickness of the valve plate and the characteristic lift of the valve plate. Under the specific conditions with the valve plate thickness of 0.305mm and the characteristic lift of the valve plate of 2.5mm， ideal performance results are obtained while the flow area and fatigue life of the valve plate are taken into account too. On this basis， the retainer profile is optimized， the flow area of the optimized valve plate increases by 8.63%， and the maximum stress decreases by 107.4MPa. The research results provide an effective reference and evaluation method for the design of discharge valve plate of rolling rotor compressor.