| 非定常机匣处理扩稳实验研究 |
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| 引用本文： | 孙大坤,刘小华,孙晓峰. 非定常机匣处理扩稳实验研究[J]. 工程热物理学报, 2008, 29(12) |
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| 作者姓名： | 孙大坤 刘小华 孙晓峰 |
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| 作者单位： | 北京航空航天大学流体与声学工程实验室,北京,100083;北京航空航天大学流体与声学工程实验室,北京,100083;北京航空航天大学流体与声学工程实验室,北京,100083 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 针对一种非定常处理机匣,在轴流风扇实验台上开展偏流吹气扩稳实验研究.主要包括t改善风扇稳定裕度的稳态特性;影响失速先兆波产生及发展的动态分析.结果表明:非定常机匣处理能够在不同工作转速下对风扇稳定裕度有显著效果,效率没有明显改变.偏流吹气可以进一步改善风扇稳定裕度,但同时也会带来一定的效率损失.动态分析证实处理机匣没有阻止失速先兆波的出现.而是有效地抑制了其非线性发展.
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| 关 键 词： | 非定常机匣处理 失速先兆波 失速裕度 |
AN EXPERIMENTAL INVESTIGATION OF STALL MARGIN IMPROVEMENT WITH UNSTEADY CASING TREATMENT |
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| SUN Da-Kun,LIU Xiao-Hua,SUN Xiao-Feng. AN EXPERIMENTAL INVESTIGATION OF STALL MARGIN IMPROVEMENT WITH UNSTEADY CASING TREATMENT[J]. Journal of Engineering Thermophysics, 2008, 29(12) |
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| Authors: | SUN Da-Kun LIU Xiao-Hua SUN Xiao-Feng |
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| Affiliation: | SUN Da-Kun LIU Xiao-Hua SUN Xiao-Feng (Fluid & Acoustic Engineering Laboratory Beijing University of Aeronautics , Astronautics) |
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| Abstract: | Casing treatments are widely used to enhance the stall margin of fan or compressor of aircraft engine.Based on the knowledge of the unsteady characteristics caused by casing treatment, it is verified that recessed casing treatment can be modeled as a wall boundary condition,which can be calculated by means of vortex sound theory.In the present work,experimental investigation is conducted with emphasis on the effect of unsteady casing treatments with injection on the stall margin and efficiency of a low spee... |
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| Keywords: | unsteady casing treatment stall inception stall margin |
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