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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2013, Vol. 34 ›› Issue (2): 255-262.doi: 10.7527/S1000-6893.2013.0029

• Fluid Mechanics and Flight Mechanics • Previous Articles     Next Articles

Research on Surpressing Flow Separation of Lobed Mixer-ejector by Scarfing Treatment

PAN Chengxiong, ZHANG Jingzhou, SHAN Yong   

  1. College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2012-03-09 Revised:2012-07-06 Online:2013-02-25 Published:2012-07-30
  • Contact: 10.7527/S1000-6893.2013.0029 E-mail:zhangjz@nuaa.edu.cn
  • Supported by:

    Funding of Jiangsu Innovation Program for Graduate Education (CXZZ11_0222)

Abstract:

To investigate flow separation inside lobed mixer-ejector and the way to control it, the relationship between lobed angle and flow separation inside lobed mixer-ejector has been revealed. To control the flow separation inside a lobed mixer-ejector with a big lobed angle, scarfing treatment is tried to study its effectiveness in eliminating separation bubbles inside the lobed mixer-ejector by numerical simulation. Results show that scarfing treatment does eliminate the separation bubbles inside the mixer-ejector, hence enhancing nozzle ejecting ratio and reducing total pressure loss. Therefore a conclusion can be drawn that for a lobed mixer-ejector, scarfing the nozzle is a proper way to control flow separation inside lobed mixer-ejectors.

Key words: lobe, ejector, flow separation, scarfing, numerical simulation

CLC Number: