Volume 26 Issue 10
Oct.  2011
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WU Bo, ZHANG Jing-zhou, SHAN Yong, SHAO Wan-ren. Numerical research on infrared radiation characteristics of two-dimension nozzle with shelter covering[J]. Journal of Aerospace Power, 2011, 26(10): 2287-2292.
Citation: WU Bo, ZHANG Jing-zhou, SHAN Yong, SHAO Wan-ren. Numerical research on infrared radiation characteristics of two-dimension nozzle with shelter covering[J]. Journal of Aerospace Power, 2011, 26(10): 2287-2292.

Numerical research on infrared radiation characteristics of two-dimension nozzle with shelter covering

  • Received Date: 2010-11-15
  • Rev Recd Date: 2011-04-16
  • Publish Date: 2011-10-28
  • Based on CFD/IR(computational fluid dynamics/infrared radiation) numerical calculations,the effects of shelter covering fixed at nozzle trailing edge and cooling air injected inside the shelter covering passage on infrared radiation characteristics of turbofan engine two-dimensional nozzle with aspect ratio 3.33 were investigated.The results based on the present parameters show that,ejected or forced cooling air flow through shelter covering passage enhances further mixing with plume,and suppresses plume infrared radiation in comparison with pure two-dimensional nozzle.As the cooling air massflow increases,the cooling action on nozzle trailing edge is more obvious.Utilizing nozzle ejection effectively could achieve satisfactory infrared radiation suppression.The suppression action on nozzle total infrared radiation with shelter covering is only realized in the detecting azimuth where the infrared radiation from nozzle inner walls is predominant.

     

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