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YE Yu-chen, HUANG Yong, LIU Lei, WEI Fu-qing. Effects of interfacial contact area and streamwise vortices on pumping ratio of lobed mixer[J]. Journal of Aerospace Power, 2015, 30(8): 2011-2017. doi: 10.13224/j.cnki.jasp.2015.08.027
Citation: YE Yu-chen, HUANG Yong, LIU Lei, WEI Fu-qing. Effects of interfacial contact area and streamwise vortices on pumping ratio of lobed mixer[J]. Journal of Aerospace Power, 2015, 30(8): 2011-2017. doi: 10.13224/j.cnki.jasp.2015.08.027
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Effects of interfacial contact area and streamwise vortices on pumping ratio of lobed mixer

doi: 10.13224/j.cnki.jasp.2015.08.027

  • 1. National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;

  • 2. Collaborative Innovation Center for Advanced Aero-Engine, Beijing 100191, China;

  • 3. China Helicopter Research and Development Institute, Aviation Industry Corporation of China, Jingdezhen Jiangxi 333001, China

  • Received Date: 2014-03-11
  • Publish Date: 2015-08-28
    Abstract
  • Numerical computations of the lobed mixer were conducted to study the effects of interfacial contact area and streamwise vortices on the pumping ratio of lobed mixer. The numerical results showed that the greater interfacial contact area of primary flow and second flow caused the better performance of the lobed mixer, and the pumping ratio grew linearly with the increase of lobe perimeter ratio. The same effects were found in streamwise vortices, but the pumping ratio grew sharply and then gently with the increase of non-dimensional streamwise vortices intensity; and an index relationship was found between them. In case no flow separation occurred, the streamwise vortices angular kinetic energy of nozzle outlet increased with the increase of lobe angle, and there was a parabolic relationship between them. Moreover, the increase of lobe diffusion angle not only can increase the vorticity of streamwise vortices, but also enlarge the streamwise vortices distribution area.

     

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