柱面螺旋槽气液两相流体动压密封稳态性能研究

为揭示航空发动机轴承腔内润滑油与加压气流形成复杂两相润滑状态下的柱面流体动压密封性能,基于两相流Mixture模型,研究气液两相介质柱面螺旋槽流体动压密封稳态性能,分析操作参数和结构参数对动压密封性能的影响.结果表明:在同样工况参数下,气液两相下柱面流体动压密封具有较好的动压效应;转速、压差以及液气比的增大均有利于提高...

Study on Steady State Performance of Gas-Liquid Two-Phase Fluid Dynamic Pressure Seal in Spiral Groove of Cylinder

In order to reveal the dynamic pressure sealing performance of the cylinder fluid under the complex two-phase lubrication formed by lubricating oil and pressurized airflow in the bearing chamber of an aeroengine,based on the two-phase flow mixture model,the steady-state performance of gas-liquid two-phase cylindrical spiral groove fluid dynamic pressure seal was studied,and the effects of operating parameters and structural parameters on the dynamic pressure seal performance were analyzed.The results show that under the same working conditions,the gas-liquid two-phase cylinder fluid dynamic pressure seal has a good dynamic pressure effect.The increase of rotating speed,pressure difference and liquid-gas ratio is beneficial to the improvement of the open force of the cylinder fluid dynamic pressure seal,while the open force decreases with the increase of spiral angle and groove depth,and increases first and then tends to be stable with the increase of groove number.The leakage rate increases with the increase of pressure difference and rotating speed,increases first and then tends to be stable with the increase of spiral angle,increases gradually with the increase of groove depth,and decreases gradually with the increase of groove number.