| 超微燃气透平非接触式密封的三维CFD数值分析 |
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| 引用本文： | 胡建军,徐进良,高化伟.超微燃气透平非接触式密封的三维CFD数值分析[J].动力工程,2009,29(2). |
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| 作者姓名： | 胡建军 徐进良 高化伟 |
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| 作者单位： | 胡建军,HU Jian-jun(中国科学院广州能源研究所,广州,510640;燕山大学建筑工程与力学学院,秦皇岛,066004);徐进良,XU Jin-liang(中国科学院广州能源研究所,广州,510640);高化伟,GAO Hua-wei(燕山大学建筑工程与力学学院,秦皇岛,066004)
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| 基金项目： | 国家自然科学基金国际合作研究项目，广东省自然科学基金重点项目 |
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| 摘 要： | 提出将螺旋密封应用于超微燃气透平气体介质密封.采用三维CFD数值计算方法分析了微尺度下无密封齿、迷宫密封和螺旋密封的泄漏规律及流场规律.结果表明:微尺度下迷宫密封最优齿数的存在与进、出口压比和密封间隙有关,而齿形对密封性能的影响没有宏观尺度下明显.在小压比下,密封轴转速对螺旋密封性能的提高明显,其泄漏减少量最高可达19.3%,因此螺旋密封显然优于迷宫密封和无密封齿;在大压比下,螺旋密封与迷宫密封的效果相当,均优于无密封齿.当压比为2时,迷宫密封的泄漏率比无密封齿降低27.1%.
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| 关 键 词： | 超微燃气透平 迷宫密封 螺旋密封 三维CFD数值模拟 |
Three-Dimensional CFD Analyses of Non-Contacting Gas Seal for Ultra-Micro Gas Turbine |
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| HU Jian-jun,XU Jin-liang,GAO Hua-wei.Three-Dimensional CFD Analyses of Non-Contacting Gas Seal for Ultra-Micro Gas Turbine[J].Power Engineering,2009,29(2). |
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| Authors: | HU Jian-jun XU Jin-liang GAO Hua-wei |
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| Affiliation: | 1;2;1.Guangzhou Institute of Energy Conversion;Chinese Academy of Sciences;Guangzhou 510640;China;2.School of Civil Engineering and Mechanics;Yanshan University;Qinhuangdao 066004;China |
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| Abstract: | The helix seal was put forward to be used in ultra-micro gas turbine(UMGT) system for reducing gas leakage.The leakage rate and flow field were analyzed for the status of no seal,labyrinth seal and helix seal in micro scale by applying the three-dimensional CFD simulation.Results show that the optimal tooth number of the labyrinth seal in micro scale is relevant to sealing gap and pressure ratio.The effect of tooth pattern on sealing performance is less significant than macro scale.In low pressure ratio,inc... |
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| Keywords: | ultra-micro gas turbine labyrinth seal helix seal three-dimensional CFD simulation |
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