高速箔片端面气膜密封热质传递规律研究

Research on Heat and Mass Transfer Law of High Speed Foil Face Gas Film Seal

为探究高参数弹性箔片端面气膜密封热性能并开展结构优化设计,基于流体仿真分析软件,建立箔片端面气膜密封热性能分析模型,考虑空气介质实际气体效应影响,研究密封端面气体流动和传热特性,分析不同工况和结构参数对密封端面各流体、固体域最高温度和平均温度的影响。结果表明:箔片端面气膜密封热量主要集中分布在平箔片和密封坝上;随着转速的上升或入口压力、最小气膜厚度的减小,密封环组件各流体和固体域平均和最高温度增大;各流体和固体域平均和最高温度随楔形高度和节距比的增大而减小。

To explore the thermal performance of high parameter compliant foil face gas film sealing and carry out structural optimization design.Based on fluid simulation analysis software,a thermal performance analysis model for foil face gas film seal was established.Considering the real gas effect of air medium,the gas flow and heat transfer characteristics of the sealing face were studied,and the influence of different working conditions and structural parameters on the highest and average temperatures of various fluids and solid domains on the sealing face was analyzed.The results show that the heat of the foil face gas film seal is mainly concentrated on the flat foil and the sealing dam.As the rotational speed increases or the inlet pressure and minimum gas film thickness decrease,the average and maximum temperatures of each fluid and solid domain of the sealing ring component increase.The average and maximum temperatures of each fluid and solid domain decrease with the increase of wedge height and pitch ratio.