| 涡扇发动机排气系统斜切波瓣强迫混合器气动和混合特性数值研究(英文) |
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| 引用本文： | 单勇,张靖周,徐亮.涡扇发动机排气系统斜切波瓣强迫混合器气动和混合特性数值研究(英文)[J].南京航空航天大学学报(英文版),2009,26(2):130-136. |
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| 作者姓名： | 单勇 张靖周 徐亮 |
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| 作者单位： | 南京航空航天大学能源与动力学院,南京,210016 |
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| 基金项目： | 南京航空航天大学民航基金资助项目.Supported by the Civil Aviation Research Foundation of Nanjing University of Aeronautics and Astronautics |
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| 摘 要： | 基于CFD技术,对波瓣尾缘斜切的波瓣喷管混合器在不同涵道比和斜切角度下的三维流场进行了数值研究.研究结果表明:斜切波瓣混合器减轻其自身重量的同时综合性能略有提高.波瓣尾缘斜切使流向涡产生位置提前,并且流向涡强度在各个涵道比下均高于常规波瓣混合器,平均在25%以上;斜切波瓣混合器较常规波瓣混合器的混合效率提高了2.45%,且随斜切角度和涵道比的增加而增大,混合管出口流体温度沿径向更平坦.在本文的内涵道比和斜切角度变化范围内,总压恢复系数高达0.935以上,而斜切对总压恢复系数的影响极其微弱,在±0.1%范围内.
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| 关 键 词： | 空气动力 数值模拟 混合器 斜切波瓣喷管 气动特性 |
NUMERICAL INVESTIGATION OF AERODYNAMIC AND MIXING CHARACTERISTICS OF SCARFED LOBED MIXER FOR TURBOFAN ENGINE EXHAUST SYSTEM |
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| Shan Yong,Zhang Jingzhou,Xu Liang.NUMERICAL INVESTIGATION OF AERODYNAMIC AND MIXING CHARACTERISTICS OF SCARFED LOBED MIXER FOR TURBOFAN ENGINE EXHAUST SYSTEM[J].Transactions of Nanjing University of Aeronautics & Astronautics,2009,26(2):130-136. |
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| Authors: | Shan Yong Zhang Jingzhou Xu Liang |
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| Institution: | College of Energy and Power Engineering;NUAA;29 Yudao Street;Nanjing;210016;P. R. China |
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| Abstract: | The flow field and aerodynamic performances for the scarfed lobed forced mixer are studied based on a computational fluid dynamics(CFD) technique. A series of computations are conducted to obtain the effects of the bypass ratio and the scarf angle on the mixing performance for the scarfed lobed mixer. Results show that the scarfed lobed mixer is reduced in the system weight. Meanwhile, aerodynamic performances are slightly improved compared with the normal lobed mixer. Two reasons for causing the mixing enh... |
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| Keywords: | aerodynamics numerical simulation mixers scarfed lobed nozzle aerodynamic characteristics |
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