| 蜂窝密封抑制叶尖密封激振的研究 |
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| 引用本文： | 何立东,张强,霍耿磊.蜂窝密封抑制叶尖密封激振的研究[J].北京化工大学学报(自然科学版),2009,36(3):97-100. |
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| 作者姓名： | 何立东 张强 霍耿磊 |
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| 作者单位： | 北京化工大学 诊断与自愈工程研究中心， 北京 100029 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 针对叶片疲劳断裂问题，研究了蜂窝密封抑制叶尖密封气流激振的性能。将叶尖密封分别采用光滑密封和蜂窝密封，测量不同密封间隙下的叶片振幅。采用烟线法显示了叶尖密封尾流场，同时绘制了流场的速度分布图。实验结果表明用蜂窝密封替代光滑密封能够减小叶片振幅，且振幅随密封间隙的增大而减小。与光滑密封相比，蜂窝密封最佳可减小无冠叶片1/4的振幅、带冠叶片1/3的振幅。对蜂窝密封抑制叶片振动的机理进行分析，蜂窝密封能够降低密封腔内流体速度、耗散流体能量，从而流体对叶片的激振力减弱，叶片振动得到有效抑制。
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| 关 键 词： | 叶轮机械 蜂窝密封 气流激振 泄漏涡 尾流 细观力学 叶轮机械 蜂窝密封 气流激振 泄漏涡 尾流 细观力学 |
| 收稿时间： | 2008-09-23 |
A study of the suppression of blade tip gas excitation in a honeycomb seal |
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| HE LiDong,ZHANG Qiang,HUO GengLei.A study of the suppression of blade tip gas excitation in a honeycomb seal[J].Journal of Beijing University of Chemical Technology,2009,36(3):97-100. |
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| Authors: | HE LiDong ZHANG Qiang HUO GengLei |
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| Institution: | Diagnosis and Self-Recovery Engineering Research Center, Beijing University of Chemical Technology, Beijing 100029, China |
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| Abstract: | The characteristics of the suppression of blade tip gas excitation in a honeycomb seal have been investigated in order to solve the problem of blade fatigue fracture. The blade vibration with different seal clearances has been surveyed with the blade tip seal having both smooth seal and honeycomb seal arrangements. The wake field of the blade tip seal was visualized using the smoke wire technique, and the velocity contours were drawn. The amplitude of blade vibration was decreased when the honeycomb seal re... |
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| Keywords: | turbomachine honeycomb seal gas excitation leakage vortex wake flow mesomechanics |
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