Volume 37 Issue 4
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CHEN Yan, FAN Guangya, LIN Zhihui, SHI Bowen, LIU Gaowen. Experimental investigation on contact thermal resistance characteristics of aero-engine flange[J]. Journal of Aerospace Power, 2022, 37(4): 734-742. doi: 10.13224/j.cnki.jasp.20210574
Citation: CHEN Yan, FAN Guangya, LIN Zhihui, SHI Bowen, LIU Gaowen. Experimental investigation on contact thermal resistance characteristics of aero-engine flange[J]. Journal of Aerospace Power, 2022, 37(4): 734-742. doi: 10.13224/j.cnki.jasp.20210574
shu

Experimental investigation on contact thermal resistance characteristics of aero-engine flange

doi: 10.13224/j.cnki.jasp.20210574
  • 1.

    School of Power and Energy，Northwestern Polytechnical University，Xi'an 710072，China

  • 2.

    Shaanxi Key Laboratory of Thermal Science in Aero-engine System，Northwestern Polytechnical University，Xi'an 710072，China

  • 3.

    Commercial Aircraft Engine Company Limited，Aero Engine Corporation of China，Shanghai 200241，China

  • Received Date: 2021-10-11
  • Publish Date: 2022-04-28
    Abstract
  • By setting up a flange contact thermal resistance experimental bench，within the range of 0-0.75 mm of flange clearance and 20-40 N?m of bolt tightening torque，the wall temperature of multiple axial positions of casing of different materials was measured to obtain the heat flux passing through the flange，and the contact thermal resistance and unit contact thermal conductivity of the flange were obtained.The influences of flange clearance and bolt tightening torque on the contact thermal resistance of flange were analyzed.The results showed that with the increase of flange clearance，the contact thermal resistance increased linearly，the maximum increase was 0.03 K/W，the unit contact thermal conductivity decreased rapidly at first，and then was inclined to smooth，with the maximum reduction of 10 744.2 W/(K?m2)，about 94.5%；with the increase of tightening torque，the contact thermal resistance decreased，the maximum reduction was 22.1%.

     

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