Volume 29 Issue 3
Mar.  2014
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Article Navigation >  Journal of Aerospace Power  > 2014  >  29(3): 519-525
PAN Cheng-xiong, ZHANG Jing-zhou, SHAN Yong, WANG Xing-tao, WANG Xian-wei. Effects of ventilation, shelter and thermal resistance in nacelle of helicopter on infrared radiation characteristics[J]. Journal of Aerospace Power, 2014, 29(3): 519-525. doi: 10.13224/j.cnki.jasp.2014.03.006
Citation: PAN Cheng-xiong, ZHANG Jing-zhou, SHAN Yong, WANG Xing-tao, WANG Xian-wei. Effects of ventilation, shelter and thermal resistance in nacelle of helicopter on infrared radiation characteristics[J]. Journal of Aerospace Power, 2014, 29(3): 519-525. doi: 10.13224/j.cnki.jasp.2014.03.006
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Effects of ventilation, shelter and thermal resistance in nacelle of helicopter on infrared radiation characteristics

doi: 10.13224/j.cnki.jasp.2014.03.006

  • 1. College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;

  • 2. Jiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;

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

  • Received Date: 2013-01-05
  • Publish Date: 2014-03-28
    Abstract
  • To reduce the temperature on helicopter nacelle skin and lower the helicopter infrared radiation,numerical investigation was conducted to study the temperature distribution on the nacelle skin and the helicopter infrared radiation characteristics for helicopter under hovering state in consideration of the rotor down wash.Several improved schemes for the nacalle were presented based on the baseline nacalle configuration,such as adopting radiation shelter,adding ventilation slots,improving trailing edge of mixed exhaust duct,and making thermal resistance layer. The effects of above treatments on the temperature distribution and infrared radiation characteristics were assessed.Conclusions can be listed as follows:(1) With the adopted radiation shelter,infrared radiation intensity of the helicopter is enhanced by 25% in 3-5μm band but remained almost the same in 8-14μm band.(2) With the added ventilation slots,infrared radiation intensity of the helicopter is reduced by 12% in 3-5μm band but remained almost the same in 8-14μm band.(3) With the added ventilation slots,improved trailing edge and thermal resistance layer,infrared radiation intensity of the helicopter is reduced by 70% and 10%,respectively,in 3-5μm and in 8-14μm bands.

     

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