| 摘要: |
| 为了研究轮缘封严附近凸起的形状对封严效率的影响，采用测量二氧化碳体积分数、腔内压力的实验方法，研究了几种典型的凸起形状对封严效率、腔内压力、腔内流场和无量纲最小封严流量的影响，目的是获得最佳的凸起形状。结果表明，凸起形状的变化对腔内的静压影响不大，封严环附近的静压变化几乎可以忽略不计。而总压和封严效率将随着凸起形状的变化而不同。安装凸起会整体提升腔内的旋流比。当凸起形状为六面体时，腔内的总压和封严效率最大，其无量纲最小封严流量相比于光滑盘平均减少了32%。 |
| 关键词: 转静腔 燃气入侵 轮缘封严 凸起形状 封严效率 |
| DOI：10.13675/j.cnki.tjjs.2203051 |
| 分类号:V231.1 |
| 基金项目: |
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| Effects of Protrusion Shape on Gas Ingestion of Rim Seals |
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ZHAO Xi1, HAN Guang-lu2, LIU Jia-hua3, LUO Xiang3, LIU Dong-dong4
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1.AECC Guiyang Engine Design Research Institute,Guiyang 550081,China;2.Weifang Intellectual Property Protection Center,Weifang 261000,China;3.Research Institute of Aero-Engine,Beijing University of Aeronautics and Astronautics,Beijing 102206,China;4.School of Energy and Power Engineering,Beijing University of Aeronautics and Astronautics,Beijing 102206,China
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| Abstract: |
| The purpose is to focus on the shape of protrusion near rim seal which was an influential factor on the sealing efficiency. Using the experimental method of measuring CO2 volume fraction and cavity pressure， the effects of several typical protrusion shapes on sealing efficiency， cavity pressure， cavity flow field and minimum sealing flow rate were investigated in order to obtain the optimal shape. The results show that the variation of protrusion shape has little impact on the static pressure in the cavity， and the change of the static pressure near the sealing ring can be neglected. The total pressure and sealing efficiency will increase with the change of protrusion shape. Installation of protrusion will increase the swirl ratio in the cavity as a whole. When the protrusion shape is hexahedron， the total pressure and sealing efficiency in the cavity are the highest， and the dimensionless minimum sealing flow is reduced by 32% on average compared with the smooth disk. |
| Key words: Rotor-stator cavity Gas ingestion Rim seal Protrusion shape Sealing efficiency |
