| 引用本文: | 张宝虎,赵玉新,柳军.二维可压缩流动抽吸流量模型及验证.[J].国防科技大学学报,2020,42(2):72-77.[点击复制] |
| ZHANG Baohu,ZHAO Yuxin,LIU Jun.Model and validation of two-dimensional compressible bleed flow[J].Journal of National University of Defense Technology,2020,42(2):72-77[点击复制] |
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| 二维可压缩流动抽吸流量模型及验证 |
| 张宝虎,赵玉新,柳军 |
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(国防科技大学 空天科学学院, 湖南 长沙 410073)
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| 摘要: |
| 根据超声速与亚声速流动的特征,依据Prandtl-Meyer膨胀波理论,根据背压与来流静压确定膨胀波后的马赫数,获得了质量抽吸流率,并导出了壅塞发生的条件,建立了二维超声速抽吸模型；根据冲量定理,假定气体从主流区域到抽吸腔流态的变化是由于压差的冲量作用,建立了亚声速抽吸模型,并且进一步阐述了亚声速抽吸壅塞发生的机制。计算流体力学验证表明亚声速抽吸冲量模型的偏差较大,因此通过数值拟合模型来描述亚声速抽吸流动。该研究为三维抽吸研究提供了参考。 |
| 关键词: 超声速抽吸 亚声速抽吸 壅塞 |
| DOI：10.11887/j.cn.202002009 |
| 投稿日期：2018-11-09 |
| 基金项目:国家自然科学基金资助项目(11472304 ); 湖南省研究生创新资助项目(CX2017B006) |
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| Model and validation of two-dimensional compressible bleed flow |
| ZHANG Baohu, ZHAO Yuxin, LIU Jun |
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(College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| According to the characteristics of supersonic and subsonic flow, the Prandtl-Meyer expansion wave theory, and the Mach number after expansion waves based on the back pressure and static pressure, the bleed mass flow rate was obtained, the conditions for the occurrence of choking were derived, and a two-dimensional supersonic bleed model was established. According to the impulse theorem, based on the assumption that the state change of gas from the main flow area to the bleed chamber was due to the impulse effect of the pressure difference, a subsonic bleed model was established and the mechanism of subsonic bleed chocking was revealed. CFD(computational fluid dynamics) verification shows that the deviation of the subsonic bleed impulse model is considerable, so the subsonic bleed flow was described by a numerical fitting model. This study provides a reference for three-dimensional bleed research. |
| Keywords: supersonic bleeding subsonic bleeding choking |
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