Volume 29 Issue 7
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Article Navigation >  Journal of Aerospace Power  > 2014  >  (7): 1639-1646
SUN Hai-jun, ZENG Zhuo-xiong, XU Yi-hua, HU Chun-bo. Influence of improved structure of bluff-body on combustion flow characteristics in advanced vortex combustor[J]. Journal of Aerospace Power, 2014, (7): 1639-1646. doi: 10.13224/j.cnki.jasp.2014.07.017
Citation: SUN Hai-jun, ZENG Zhuo-xiong, XU Yi-hua, HU Chun-bo. Influence of improved structure of bluff-body on combustion flow characteristics in advanced vortex combustor[J]. Journal of Aerospace Power, 2014, (7): 1639-1646. doi: 10.13224/j.cnki.jasp.2014.07.017
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Influence of improved structure of bluff-body on combustion flow characteristics in advanced vortex combustor

doi: 10.13224/j.cnki.jasp.2014.07.017

  • 1. School of Astronautics, Northwestern Polytechnial University, Xi'an 710072;

  • 2. School of Aircraft Engineering, Nanchang Hangkong University, Nanchang 330063, China

  • Received Date: 2013-04-17
  • Publish Date: 2014-07-28
    Abstract
  • In order to study the mechanism of flame stabilization in cavity of advanced vortex combustor, an improvement program of after bluff-body structure was introduced, and the combustion characteristics of improved combustor under the conditions of premixed and non-premixed combustion were numerically simulated. The results show that under the condition of premixed combustion, the improved bluff-body structure can enhance the intensity and temperature of vortex flow in cavity, and make the temperature distribution more evenly no matter if equivalence ratio is 0.6 or equal to 1.0. In addition, the cavity temperature increases with the increasing premixed inlet velocity, and changes little when the velocity reaches a certain value. Under the condition of non-premixed combustion, the improved bluff-body structure ameliorates the vortex flow and temperature distribution in cavity, and the cavity maintains relatively high temperature under the condition of lean burning. The improved lightweight combustor can provide certain reference for engineering application.

     

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