压差对旋转直通式迷宫气封流场及流场力影响规律研究

基于稳态计算流体动力学（CFD）方法，研究了压差对旋转直通式迷宫气封泄漏、流场和流场力的影响。通过网格密度分析验证了稳态CFD方法满足计算精度要求，通过影响和敏感度分析给出了压差的变化对泄漏量、流场速度流线、总压强分布、流体压力和流体粘滞力的影响。研究结果表明：随着压差的增大，泄漏量、径向流体压力、轴向流体压力、总流体压力、径向流体粘滞力、轴向流体粘滞力和总流体粘滞力均增大。

Effects of a pressure drop on the flow field and fluid-induced force of the rotary straight-through labyrinth gas seal

The effects of the pressure drop on the leakage, flow field and fluid-induced force of a rotary straight-through labyrinth gas seal have been investigated using a steady-CFD analysis method. The grid density analysis ensures that the steady-CFD analysis method meets the requirements of calculation precision. The effect and sensitivity analyses show that the changes in pressure drop affect the leakage flow rates, velocity streamlines, total pressure distributions, pressure forces, and viscous forces. The results indicate that increasing the pressure drop increases the leakage flow rates, axial pressure forces, radial pressure forces, total pressure forces, axial viscous forces, radial viscous forces and total viscous forces.