| 带周向单槽的低速轴流压气机失速起始过程 |
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| 引用本文： | 高立朋,杜娟,李继超,林峰,聂超群. 带周向单槽的低速轴流压气机失速起始过程[J]. 航空学报, 2015, 36(12): 3822-3831. DOI: 10.7527/S1000-6893.2015.0136 |
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| 作者姓名： | 高立朋 杜娟 李继超 林峰 聂超群 |
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| 作者单位： | 1. 中国科学院工程热物理研究所, 北京 100190;2. 中国科学院先进能源与动力重点实验室, 北京 100190;3. 中国科学院大学, 北京 100190 |
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| 基金项目： | 国家自然科学基金(51106153,51176188) |
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| 摘 要： | 为了深入认识周向槽轴向位置对压气机失速机制的影响规律,针对某叶尖敏感的低速单转子压气机开展实验测量与数值模拟相结合的研究。实验与计算结果均表明,位于叶片弦长中部的周向单槽扩稳效果最好,而位于叶片前缘下游20%~30%轴向弦长位置的周向单槽扩稳效果最差。进一步分析了利用非定常、多通道计算模型获得的数值结果,发现对于光壁机匣和扩稳效果最好的周向单槽机匣,泄漏流与主流交界面在近失速工况下到达叶片前缘位置,压气机通过突尖型失速先兆进入失速状态;对于扩稳效果最差的周向单槽机匣,泄漏流与主流交界面在近失速工况下仍位于叶片通道内部距离叶片前缘20%的轴向弦长位置,压气机经历了由准模态型失速先兆向突尖型失速先兆转换的失速起始过程。
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| 关 键 词： | 低速轴流压气机 周向单槽 泄漏流与主流交界面 扩稳裕度 失速起始过程 |
| 收稿时间： | 2015-01-12 |
| 修稿时间： | 2015-05-13 |
Prestall process in low-speed axial compressor with single circumferential casing groove |
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| GAO Lipeng,DU Juan,LI Jichao,LIN Feng,NIE Chaoqun. Prestall process in low-speed axial compressor with single circumferential casing groove[J]. Acta Aeronautica et Astronautica Sinica, 2015, 36(12): 3822-3831. DOI: 10.7527/S1000-6893.2015.0136 |
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| Authors: | GAO Lipeng DU Juan LI Jichao LIN Feng NIE Chaoqun |
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| Affiliation: | 1. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;2. Key Laboratory of Advanced Energy and Power, Chinese Academy of Sciences, Beijing 100190, China;3. University of Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | In order to further understand the impact of circumferential casing groove axial location on stall mechanism of compressor, a tip sensitive low-speed single rotor is tested and numerically simulated. The results show that the location with the maximum stall margin improvement (SMI) is near the mid-chord of blade tip and the location with the minimal SMI is around 20%-30% axial tip chord aft of blade leading edge. Numerical results are acquired from an unsteady multi-passage numerical scheme. For smooth casing and the optimal groove, the interface between the tip leakage flow and main flow reaches blade leading edge under the near stall condition and spike stall inception appears; but for the worst groove, the interface is away from blade leading edge under the near stall condition, around 20% axial tip chord aft of blade leading edge, and a conversion between quasi-modal stall inception and spike stall inception is captured. |
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| Keywords: | axial low-speed compressor single circumferential casing groove tip leakage flow/main flow interface stall margin improvement prestall process |
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