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首页> 外文会议>International Symposium on Stability Control of Rotating Machinery(ISCORMA-4); 20070827-31; Calgary(CA) >CFD RESULTS OF INLET AND REVERSE PUMPING FLOW FOR COMMON LABYRINTH SEAL LEAK PATH GEOMETRIES
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CFD RESULTS OF INLET AND REVERSE PUMPING FLOW FOR COMMON LABYRINTH SEAL LEAK PATH GEOMETRIES

机译：普通拉边密封泄漏通道几何形状的进气和反向泵流动CFD结果。

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摘要

Labyrinth seals in various kinds of turbo machines often generate driving force components that may increase the unstable vibration of the rotor. The evaluation of labyrinth seal destabilizing forces have been documented by CFD analysis but only limited results have considered the leak path geometry influence on the resulting entry and reverse pumping flow prior to the labyrinth seal geometry. In this research, a commercial CFD program is used to simulate leak path and labyrinth seal flows of various centrifugal compressor eye seal leak flow geometries. For each case, 3D models with eccentric rotor are solved to obtain the leakage flow, velocity vector, chamber pressure, and the average chamber swirl entering the seal. Comparison to bulk flow analysis for the same geometries and sealing conditions will be discussed.
机译：各种涡轮机中的迷宫式密封通常会产生驱动力分量，这可能会增加转子的不稳定振动。迷宫式密封件去稳定力的评估已通过CFD分析进行了记录，但只有有限的结果考虑了泄漏路径几何形状对在迷宫式密封件几何形状之前产生的进入和反向泵送流量的影响。在这项研究中，商业CFD程序用于模拟各种离心压缩机眼密封件泄漏流几何形状的泄漏路径和迷宫式密封件流动。对于每种情况，求解带有偏心转子的3D模型，以获得泄漏流量，速度矢量，腔室压力以及进入密封件的平均腔室涡流。将讨论与相同几何形状和密封条件下的大流量分析的比较。

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