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Volume 40 Issue 10
Oct.  2014
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Journal of Beijing University of Aeronautics and Astronautics  > 2014  >  40(10): 1417-1423.
Sheng Zhiqiang, Huang Peilin, Ji Jinzu, et al. Effects of modification on jet mixing of sword alternating lobed nozzle[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(10): 1417-1423. doi: 10.13700/j.bh.1001-5965.2013.0633(in Chinese)
Citation: Sheng Zhiqiang, Huang Peilin, Ji Jinzu, et al. Effects of modification on jet mixing of sword alternating lobed nozzle[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(10): 1417-1423. doi: 10.13700/j.bh.1001-5965.2013.0633(in Chinese)
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Effects of modification on jet mixing of sword alternating lobed nozzle

doi: 10.13700/j.bh.1001-5965.2013.0633

  • School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 05 Nov 2013
  • Publish Date: 20 Oct 2014
    Abstract
  • A novel lobed nozzle named as sword alternating lobed nozzle was designed, combined with the characteristics of the existing alternating lobed nozzles to modify the baseline lobed nozzle. The effects of scalloping and scarfing on jet mixing of sword alternating lobed nozzle were investigated by numerical method. The results show that when the degree of scalloping or scarfing enhanced, the mixing in the downstream region of the lobe peak is accelerated, however the center primary flow needs a longish journey to be mixed. Scarfing has more capacity on promoting mixing than scalloping. Pumping performance and flow loss change little with scalloping whereas decrease slightly with scarfing. The results also indicate that the form of streamwise vortices has higher influence on mixing efficiency compared with the intensity of streamwise vortices.

     

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    • References(18)
  • [1]
    Shumpert P K. An experimental model investigation of turbofan engine internal exhaust gas mixer configurations[R].AIAA-80-0228,1980
    [2]
    Frost T H. Practical bypass mixing system for fan jet aero engines[J].Aeronautical Quarterly,1966,17(5):141-160
    [3]
    Crouch R W, Coughlin C L,Paynter G C.Nozzle exit flow profile shaping for jet noise reduction[J].Journal of Aircraft,1977, 14(9): 860-867
    [4]
    Power G D, McClure M D,Vinh D. Advanced IR suppressor design using a combined CFD/test approach[R].AIAA-94-3215, 1994
    [5]
    Kuchar A P, Chamberlin R.Scale model performance test investigation of exhaust system mixers for an energy efficient engine(E3) propulsion system[R].AIAA-80-0229,1980
    [6]
    Kozlowski H, Kraft G.Experimental evaluation of exhaust mixers for an energy efficient engine[R].AIAA-80-1088,1980
    [7]
    McComb J G, Parsons S V,Wilson J A.Exhaust system performance improvement for a long-duct nacelle installation for the DC-10[R].AIAA-80-1195,1980
    [8]
    Abolfadl M A, Sehra A K.Experimental investigation of exhaust system mixers for a high bypass turbofan engine[R].AIAA-93-0022,1993
    [9]
    刘友宏,杜力伟, 谢翌,等.波瓣凹扇修形对波瓣强迫混合排气系统性能影响[J].科学技术与工程,2013,13(18): 52265233 Liu Youhong,Du Liwei,Xie Yi,et al.Effect of elliptical cut at trailing edge of a lobed mixer on aerodynamic and thermal performance of a turbofan forced mixing exhaust system[J].Science Technology and Engineering,2013,13(18):5226-5233(in Chinese)
    [10]
    Shan Y, Zhang J Z,Xu L.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
    [11]
    潘丞雄,张靖周, 单勇.斜切对抑制引射式波瓣喷管内部流动分离的效果研究[J].航空学报,2013,34(2):255-262 Pan Chengxiong,Zhang Jingzhou,Shan Yong.Research on suppressing flow separation of lobed mixer-ejector by scarfing treatment[J].Acta Aeronautica et Astronautica Sinica,2013, 34(2): 255-262(in Chinese)
    [12]
    Koutmos P, McGuirk J J.Velocity and turbulence char-acteristics of isothermal lobed mixer flows[J].ASME Journal of Fluids Engineering,1995,117(4):633-638
    [13]
    Pinker R A, Strange P J R.The noise benefits of forced mixing[R].AIAA-98-2256,1998
    [14]
    Presz W,Reynolds G. Alternating lobed mixer/ejector concept suppressor,ALMEC suppressor:US,5884472[P].1999-03-23
    [15]
    Yu S C M, Hou Y,Chan W K.Scarfing and scalloping effects on lobed forced mixer at low-speed conditions[J].Journal of Propulsion and Power,2000,16(3):440-448
    [16]
    Hu H, Saga T,Kobayashi T.Dual-plane stereoscopic PIV measurements in a lobed jet mixing flow[R].AIAA-2005-443,2005
    [17]
    Xie Y, Liu Y H.A modified thermal mixing efficiency and its application to lobed mixer nozzle for aero-engines[J].Heat Transfer Research,2011,42(4):317-335
    [18]
    Belovich V M, Samimy M.Mixing process in a coaxial geometry with a central lobed mixing nozzle[J].AIAA Journal,1997, 35(5): 838-841
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