Volume 30 Issue 11
Nov.  2015
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ZHANG Chi, YU Bo-wen, YANG Qian, LIU Cheng-chuan, LIN Yu-zhen. Analysis of low-swirl injector emissions and combustion stabilization[J]. Journal of Aerospace Power, 2015, 30(11): 2575-2583. doi: 10.13224/j.cnki.jasp.2015.11.003
Citation: ZHANG Chi, YU Bo-wen, YANG Qian, LIU Cheng-chuan, LIN Yu-zhen. Analysis of low-swirl injector emissions and combustion stabilization[J]. Journal of Aerospace Power, 2015, 30(11): 2575-2583. doi: 10.13224/j.cnki.jasp.2015.11.003
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Analysis of low-swirl injector emissions and combustion stabilization

doi: 10.13224/j.cnki.jasp.2015.11.003

  • 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

  • Received Date: 2014-04-04
  • Publish Date: 2015-11-28
    Abstract
  • Low-swirl combustion technology based on low-swirl injector (LSI) has an ability of ultra-low emission. The principle of the low-swirl combustion stabilization and emissions reduction was analyzed; it was found that its special flowfield structure matching the turbulent flame propagation was a key factor for combustion stabilization and pollution emissions. Key parameters such as the vane angle, radius ratio and mass flow ratio, could impact the downstream flow characteristics of LSI, which would further affect the combustion performance. Fuels impact the combustion stabilization and pollution emissions of LSI by the flame speed and adiabatic flame temperature. To apply the liquid fuel in LSI, the premixed prevaporised combustion was adopted at present, and the experimental results indicated that it could reduce 10%-60% of NOx emissions compared with the traditional high swirl injector combustor, along with a risk of autoignition and flashback. And for LSI spray combustion, more basic researches on the liquid spray combustion in low-swirl flow shall be required. It is difficult to develop next-generation ultra-low emission combustor for aero-engines different from the traditional high-swirl combustion, unless solving the application problem of LSI using liquid fuel.

     

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