| 双级跨声风扇双段轴向缝式机匣扩稳机理分析 |
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| 引用本文： | 吴艳辉,张皓光,楚武利,苏中亮. 双级跨声风扇双段轴向缝式机匣扩稳机理分析[J]. 推进技术, 2010, 31(2): 181-186,192 |
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| 作者姓名： | 吴艳辉 张皓光 楚武利 苏中亮 |
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| 作者单位： | 西北工业大学,动力与能源学院,陕西,西安,710072 |
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| 基金项目： | 西北工业大学基础研究基金(W018101); 航空基金(2007ZB53021); 航空科技创新基金(08B53004) |
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| 摘 要： | 以高负荷,高转速的双级跨声轴流风扇为对象,用数值模拟的方法研究了双段轴向倾斜槽类机匣的扩稳机理。计算得到的实体壁机匣和处理机匣的性能曲线与实验结果符合得较好。计算和实验均表明,双段缝式处理机匣扩大亚声速工况下的稳定工作范围。通过详细的流场分析表明,亚声工况下双级风扇第1级动叶吸力面附面层分离造成的叶顶通道阻塞是双级风扇流动失稳的关键因素。双段缝式处理机匣利用叶顶通道的压差在缝内形成回流,该回流将转子顶部通道内的低能流体抽吸进入缝中并向缝上游输运,在输送过程中在压差的作用下加速,最后在缝上游区重新进入主流。通过这种方式激励了转子顶部通道端壁区的低能气团,从而有效地扩大了亚声速工况下该跨声速风扇的稳定工作范围。
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| 关 键 词： | 跨音速压气机 机匣处理 数值模拟 扩稳机理+ |
Mechanism of stall margin improvement of two stages transonic fan with two-portion axial slot casing treatment |
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| WU Yan-hui,ZHANG Hao-guang,CHU Wu-li and SU Zhong-liang. Mechanism of stall margin improvement of two stages transonic fan with two-portion axial slot casing treatment[J]. Journal of Propulsion Technology, 2010, 31(2): 181-186,192 |
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| Authors: | WU Yan-hui ZHANG Hao-guang CHU Wu-li SU Zhong-liang |
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| Affiliation: | WU Yan-hui,ZHANG Hao-guang,CHU Wu-li,SU Zhong-liang(Schoo of Power , Energy,Northwestern Polytechnical Univ.,Xi'an 710072,China) |
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| Abstract: | The mechanism of stall margin improvement is investigated on a high rotating speed and high load two-stage transonic compressor with two-portion axial slot casing treatment by 3D numerical simulation. The calculated overall performance curves good agree well with the experiments. The results show that the stable operating range is extended with two-portion axial slot casing treatment in the subsonic condition. The detailed analysis of the calculated flow-filed at the blade tip shows that the separation of t... |
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| Keywords: | Transonic compressor Casing treatment Numerical simulation Mechanism of stall margin improvement+ |
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