Mechanism of Forced Mixing for Lobed Mixer with Inlet Swirl

Journal of Propulsion Technology ›› 2013, Vol. 34 ›› Issue (2): 230-239.

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Mechanism of Forced Mixing for Lobed Mixer with Inlet Swirl

Key Laboratory of Light-duty Gas Turbine/Institute of Engineering Thermophysics,Chinese Academy of Sciences, Beijing, 100190,China ;Graduate University of Chinese Academy of Sciences, Beijing, 100190,China;Key Laboratory of Light-duty Gas Turbine/Institute of Engineering Thermophysics,Chinese Academy of Sciences, Beijing, 100190,China;Key Laboratory of Light-duty Gas Turbine/Institute of Engineering Thermophysics,Chinese Academy of Sciences, Beijing, 100190,China ;Graduate University of Chinese Academy of Sciences, Beijing, 100190,China;Key Laboratory of Light-duty Gas Turbine/Institute of Engineering Thermophysics,Chinese Academy of Sciences, Beijing, 100190,China

Published:2021-08-15

进口预旋条件下波瓣混合器强制掺混机理

苏尚美^1,2,雷志军¹,岳巍^1,2,朱俊强¹

中国科学院工程热物理研究所/轻型动力重点实验室,北京 100190;中国科学院研究生院,北京 100190;中国科学院工程热物理研究所/轻型动力重点实验室,北京 100190;中国科学院工程热物理研究所/轻型动力重点实验室,北京 100190;中国科学院研究生院,北京 100190;中国科学院工程热物理研究所/轻型动力重点实验室,北京 100190

作者简介:苏尚美(1988—)女,博士生,研究领域为航空发动机进/排气系统。E-mail:leizhijun@iet.cn
基金资助:
国家自然科学基金(51106152)。

Abstract

Abstract: The forced mixing mechanism of lobed mixer was studied experimentally and numerically, and so did the influence of inlet swirl on flow mixing. The results indicate that the κ-ω SST turbulent model can be used to predicate the mixing flow of lobed mixer.Mean while the large-scale streamwise vortices, induced by the radial pressure gradient of penetration region, dominate the flow mixing process of lobed mixer.Further more, the inlet swirl induces the generation of additional streamwise vortex and the recirculation zone downstream of the center-body,which enhances the interaction among various vortices, and accelerates the flow mixing between core and bypass flow.

Key words: Lobed mixer; Jet mixing; Inlet swirl; Streamwise vortex

摘要： 以波瓣混合器为研究对象,通过试验和数值计算的方法研究了其强制射流掺混的机理及进口预旋对射流掺混的作用机制。结果表明:κ-ω SST模型能较好地模拟波瓣射流掺混过程；波瓣贯穿区径向压力梯度所诱导的大尺度流向涡在射流掺混过程中起支配作用；与轴向进气工况相比,进口预旋导致附加流向涡对及中心锥下游回流区的形成,强化了射流涡系间相互作用,加速了射流掺混过程。

关键词: 波瓣混合器;射流掺混;进口预旋;流向涡

SU Shang-mei ^1,2,LEI Zhi-jun¹,YUE Wei^1,2,ZHU Jun-qiang¹. Mechanism of Forced Mixing for Lobed Mixer with Inlet Swirl[J]. Journal of Propulsion Technology, 2013, 34(2): 230-239.

苏尚美,雷志军,岳巍,朱俊强. 进口预旋条件下波瓣混合器强制掺混机理[J]. 推进技术, 2013, 34(2): 230-239.

References

[1] 邵万仁,尚守堂,张力,等,大涵道比涡扇发动机排气喷管技术分析 [C].中国深圳:中国航空学会学术年会, 2007.
[2] Kozlowski H, Larkin M.Energy Efficient Engine:Exhaust Mixer Model Technology Report [R].NASA-CR-9,1.
[3] Rowe R K,Kuchar A P.Energy Efficient Engine:Scaled Mixer Performance Report (Final)[R].NASA-CR-167947,1982.
[4] Eckerle W A, Sheibani H, Awad J.Experimental Measurement of the Vortex Development Downstream of a Lobed Forced Mixer [J].Journal of Engineering for Gas Turbines and Power, 2,4:63-71.
[5] Elliott J K, Manning T A, Qiu Y J,et al.Computational and Experimental Studies of Flow in Multi-lobed Forced Mixers [R].AIAA 92-3568.
[6] Manning T A.Experimental Studies of Mixing Flows with Streamwise Vorticity [D].USA:Massachusetts Institute of Technology, 1991.
[7] McCormick D C,Jr Bennett J C.Vortical and Turbulent Structure of a lobed Mixer Free Shear Layer [J].AIAA Journal, 4,2(9):1852-1859.
[8] Mao R, Yu S C M, Zhou T,et al.On the Vorticity Characteristics of Lobe-Forced Mixer at Different Configurations [J].Experiments in Fluids, 9,6:1049-1066.
[9] Mengle V G, Dalton W N.Lobed Mixer Design for Noise Supression [R].NASA-CR 2002-210823.
[10] Yong Shan, Jingzhou Zhang,Liang Xu.Numerical Investigation of Aerodynamic and Mixing Characteristics of Scarfed Lobed Mixer for Turbofan Engine Exhaust System [J]. Transactions of Nanjing University of Aeronautics & Astronautics, 9,6(2):130-136.
[11] Hui Hu, Tetsuo Saga,Toshio Kobayash.Simultaneous Measurements of All Three Components of Velocity and Vorticity Vectors in a Lobed Jet Flow by Means of Dual-Plane Stereoscopic Particle Image Velocimetry [J].Physics of Fluids, 2,4(7):2128-2138.
[12] Lu H Y, Ramsay J W,Miller D L.Noise of Swirling Exhaust Jets [J].AIAA Journal, 7,5(5):642-646.
[13] Schwartz I R.Minimization of Jet and Core Noise of a Turbojet Engine by Swirling the Exhaust Flow [R]. AIAA 75-503.
[14] Carpenter P W,Johannesen N H.An Extension of One-Dimensional Theory to Inviscid Swirling Flow through Choked Nozzles [J].Aeronautical Quarterly, 5,6.
[15] Knowles K,Carpenter P W.Use of Swirl for Flow Control in Propulsion Nozzles [J].Journal of Propulsion and Power, 0,6(2):158-164.
[16] 王锁芳,李立国,吴国钏.波瓣喷管双层壁扩压器流场的数值分析 [J].空气动力学学报,2004,22(1).
[17] 刘友宏,李立国.直排波瓣喷管引射器流场计算k-ε模型的选择 [J].空气动力学学报,2002,20(3).
[18] 于东,董金钟.基于二次曲线的圆排波瓣引射-混合器设计方法研究 [J].黑龙江科技信息,2008,31:3-4.
[19] Lei J, Mahallati A, Cunnigham M, et al.Effects of Core Flow Swirl on Flow Characteristics of a Scalloped Lobed Force Mixer [R].ASME 2011-GT-46726.

Mechanism of Forced Mixing for Lobed Mixer with Inlet Swirl

进口预旋条件下波瓣混合器强制掺混机理

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