| 圆弧型指尖密封迟滞特性的数学计算方法 |
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| 引用本文： | 杜春华,张延超,董书娜,崔亚辉,吉洪湖.圆弧型指尖密封迟滞特性的数学计算方法[J].航空动力学报,2022,37(8):1587-1596. |
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| 作者姓名： | 杜春华 张延超 董书娜 崔亚辉 吉洪湖 |
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| 作者单位： | 1.西安理工大学 机械与精密仪器工程学院，西安 710048 |
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| 基金项目： | 陕西省科技成果转移与推广计划（2018XNCG-G-11）； 陕西省教育厅服务地方专项计划项目（19JC030）；国家自然科学基金青年基金（51305343） |
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| 摘 要： | 为了预测指尖密封迟滞特性，提出了用能够直观反映指尖密封迟滞特性的最小迟滞量来表征指尖密封的迟滞，建立了指尖密封最小迟滞量计算的数学模型，确定了模型中的修正系数，并进行了试验验证，采用修正后的计算模型研究并获得了结构和工况参数对指尖密封迟滞的影响规律。研究结果表明:采用修正后的模型进行考虑迟滞效应的泄漏特性数值计算与试验结果误差最大为7.64%，最小迟滞量的计算模型合理可靠；指尖密封结构参数对其最小迟滞量影响程度从小到大依次为:指梁型线圆、指梁间隙、指梁根圆、指梁顶圆、指梁基圆、周向角、指尖片厚度。研究结果为进一步开展迟滞对指尖密封泄漏特性影响和指尖密封结构优化设计的研究提供了依据和理论基础。
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| 关 键 词： | 指尖密封 迟滞特性 最小迟滞量 结构参数 工况参数 |
| 收稿时间： | 2021/3/22 0:00:00 |
Mathematical calculation method for hysteresis characteristics of arc-shaped finger seal |
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| DU Chunhu,ZHANG Yanchao,DONG Shun,CUI Yahui,JI Honghu.Mathematical calculation method for hysteresis characteristics of arc-shaped finger seal[J].Journal of Aerospace Power,2022,37(8):1587-1596. |
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| Authors: | DU Chunhu ZHANG Yanchao DONG Shun CUI Yahui JI Honghu |
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| Affiliation: | 1.School of Mechanical and Precision Instrument Engineering，Xi'an University of Technology，Xi'an 710048，China2.Research and Development Department，Suzhou Maxwell Technologies Company Limited，Suzhou Jiangsu 215200，China3.College of Energy and Power Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China |
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| Abstract: | In order to predict the hysteresis characteristics of finger seal accurately,minimum hysteresis representing hysteresis characteristics of finger seal was proposed.Then minimum hysteresis mathematical calculation method was established,the correction coefficient of model was determined and verified by experiments.The influence rules of the structure and working condition parameters of finger seals on the hysteresis characteristics were studied and obtained based on the modified calculation model.Results showed that the maximum error between the numerical calculation of leakage characteristics considering the hysteresis effect based on modified calculation model and the test results was 7.64%,and the conclusion of model was reliable.The degree of influence of various structural parameters on the hysteresis characteristics of finger seal was in descending order: thickness of each finger laminate,finger repeat angle,arc radius of the finger beam arcs centers,diameter of the finger base circle,width of the interstice between fingers,and arc radius of finger beam.The results provide a theoretical basis and basis for further research on the influence of hysteresis on the finger seal leakage characteristics and the optimal design of finger seal structure. |
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| Keywords: | finger seal hysteresis characteristics minimum hysteresis structural parameters working conditions parameters |
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