CFD-Predicted Rotordynamic Coefficients for a 20-Teeth-on-Stator Labyrinth Seal at High Supply Pressure Conditions
CFD-Predicted Rotordynamic Coefficients for a 20-Teeth-on-Stator Labyrinth Seal at High Supply Pressure Conditions
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DOI：
10.1115/gt2012-68381
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发表时间：
2012-06
期刊：
影响因子：
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通讯作者：
A. Pugachev;Heiko Degen
中科院分区：
文献类型：
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作者：
A. Pugachev;Heiko Degen
利用CFD方法对齿径向间隙为0.1 mm的20齿定子迷宫密封进行了数值模拟，以预测密封的泄漏性能以及刚度和阻尼系数。对于三种轴转速(10200 rpm、15200 rpm和20200 rpm)、三种预扭比(低、中和高)以及三种压力比(0.1rpm、0.35rpm和0.5rpm)，在供应压力为70bar的情况下执行计算。将预测的密封性能与Picardo和Childs(Picardo，A.和Childs，D.W.，2005)获得的实验数据进行了比较，在70巴供应压力下，对齿式定子迷宫密封的旋转动力系数进行了比较：测量与理论的比较以及与孔型定子密封的比较，文本引用了ASME J.Eng。燃气轮机动力，127，第843-855页)。CFD模拟结果与实验数据吻合较好。泄漏性能被低估了高达19.8个反斜杠
A twenty-teeth-on-stator labyrinth seal with a tooth radial clearance of 0.1 mm is modeled using a CFD method to predict leakage performance, as well as stiffness and damping coefficients. The calculations are performed at a supply pressure of 70 bar for three shaft rotational speeds (10200 rpm, 15200 rpm, and 20200 rpm), three preswirl ratios (low, medium, and high), and three pressure ratios (0.1, 0.35, and 0.5). The predicted performance of the seal is compared to experimental data obtained by Picardo and Childs (Picardo, A. and Childs, D.W., 2005, textquotelefttextquoteleftRotordynamic Coefficients for a Tooth-on-Stator Labyrinth Seal at 70 Bar Supply Pressures: Measurements Versus Theory and Comparison to a Hole-Pattern Stator Seal,textquoterighttextquoteright ASME J. Eng. Gas Turbines Power, 127, pp. 843-855). The results from CFD simulations follow the experimental data. Leakage performance is underpredicted by up to 19.8backslash