Volume 30 Issue 12
Dec.  2015
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SHI Hong, JIANG Yan-long, CAI Yu-fei, PENG Yin, WANG He-xu. Insulation design of aircraft pneumatic duct system based on air insulation[J]. Journal of Aerospace Power, 2015, 30(12): 2910-2918. doi: 10.13224/j.cnki.jasp.2015.12.014
Citation: SHI Hong, JIANG Yan-long, CAI Yu-fei, PENG Yin, WANG He-xu. Insulation design of aircraft pneumatic duct system based on air insulation[J]. Journal of Aerospace Power, 2015, 30(12): 2910-2918. doi: 10.13224/j.cnki.jasp.2015.12.014

Insulation design of aircraft pneumatic duct system based on air insulation

doi: 10.13224/j.cnki.jasp.2015.12.014
  • Received Date: 2014-05-14
  • Publish Date: 2015-12-28
  • Based on the study of the performance of existing duct leakage detection system of commercial aircraft, an improved leakage detection system based on multilayer insulation design method was proposed. Also, the calculation method of multilayer insulation design was derived with engineering calculation method and the calculation of the insulation with different diameters was conducted. Meanwhile, in order to testify the accuracy of the method, the leakage detection experiment platform was built, and the outside surface temperature of air insulation in different air temperatures was obtained. Also, the influences of the number and the diameter of the diversion channel on the insulation calculation were investigated by numerical simulation. Finally, an optimized structure of the air detection system was proposed. The results show that the improved leakage detection system with quick diversion performance is superior to the traditional leakage detection system since the leakage signal can be detected in time and the alarm system can react quickly. Besides, the outside surface temperature of the insulation is averagely 23.08 percent larger than that of test, and decreases with the diameter and the number of the diversion channel. Also, as the number of the diversion channel increases, the influence of the diversion channel is more remarkable. This work could be helpful to domestic design of China's civil-aircraft ducting system.

     

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