| 模式选择阀开度对变循环压缩系统匹配的影响 |
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| 引用本文： | 刘宝杰,王若玉,于贤君.模式选择阀开度对变循环压缩系统匹配的影响[J].工程热物理学报,2020(3):562-572. |
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| 作者姓名： | 刘宝杰 王若玉 于贤君 |
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| 作者单位： | 北京航空航天大学能源与动力工程学院;北京航空航天大学航空发动机气动热力国防重点实验室;先进航空发动机协同创新中心 |
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| 基金项目： | 国家自然科学基金资助项目(No.51776010)。 |
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| 摘 要： | 对双外涵变循环压缩系统进行了建模和全三维数值模拟,分析了模式转换过程中第二外涵道倒流对系统气动性能及部件匹配规律的影响。随着倒流流量的增大,变循环压缩系统的第一外涵道比和总涵道比提高,风扇总压比升高,CDFS与高压压气机的总压比降低。倒流主要影响风扇后面级的气动性能。倒流导致CDFS进口流场发生畸变,CDFS下游第一分流环局部流场严重恶化,应及时调节系统控制参数防止压缩系统失效。
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| 关 键 词： | 变循环发动机 压缩系统 倒流 匹配 |
The Influence of Mode Selector Valve Position in the Matching of a Variable Cycle Compression System |
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| LIU Bao-Jie,WANG Ruo-Yu,YU Xian-Jun.The Influence of Mode Selector Valve Position in the Matching of a Variable Cycle Compression System[J].Journal of Engineering Thermophysics,2020(3):562-572. |
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| Authors: | LIU Bao-Jie WANG Ruo-Yu YU Xian-Jun |
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| Institution: | (School of Energy and Power Engineering,Beihang University,Beijing 100191,China;National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics,Beihang University,Beijing 100191,China;Collaborative Innovation Center of Advanced Aero-engine,Beijing 100191,China) |
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| Abstract: | A three-dimensional model of compression system in a double bypass engine is established,and the influence of second bypass recirculation during mode transition on the system aerodynamic performance and matching characteristics is investigated through numerical simulation.The increase of recirculation massflow is accompanied by the rise of the system first and total bypass ratios,the fan total pressure ratio will also increase whilst the CDFS and HPC total pressure ratio will decrease.Recirculation mainly influences the aft stage of the fan,and incurs inlet distortion at CDFS inlet.Flow conditions in the CDFS downstream will be deteriorated due to recirculation,which requires timely control regulation to ensure steady system operation. |
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| Keywords: | variable cycle engine compression system flow recirculation components matching |
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