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Volume 42 Issue 7
Jul.  2016
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Journal of Beijing University of Aeronautics and Astronautics  > 2016  >  42(7): 1502-1508.
XUE Hao, XIE Yongqi, DAI Hua, et al. Investigation of temperature fluctuation in loop heat pipe under acceleration fields[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(7): 1502-1508. doi: 10.13700/j.bh.1001-5965.2015.0465(in Chinese)
Citation: XUE Hao, XIE Yongqi, DAI Hua, et al. Investigation of temperature fluctuation in loop heat pipe under acceleration fields[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(7): 1502-1508. doi: 10.13700/j.bh.1001-5965.2015.0465(in Chinese)
shu

Investigation of temperature fluctuation in loop heat pipe under acceleration fields

doi: 10.13700/j.bh.1001-5965.2015.0465
  • 1.

    School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

  • 2. Zhengzhou Kindergarten Teachers College, Zhengzhou 453001, China

  • 3. Science and Technology on Space Physics Laboratory, Beijing 100076, China

  • Received Date: 13 Jul 2015
  • Publish Date: 20 Jul 2016
    Abstract
  • Based on the centrifugal machine system, a test apparatus was set up to investigate the operating characteristics of dual compensation chambers loop heat pipe (DCCLHP) under both gravity and acceleration fields. The ranges of the heat load and the magnitude of acceleration are 25-300W and 3g-9g, respectively. The influences of different heat loads, acceleration directions and magnitudes on temperature fluctuations of loop heat pipe were analyzed. The results indicate that the effect of the acceleration can change the start mode and operating performance of the DCCLHP. The temperature fluctuation at the outlet of the condenser and even around the whole loop can be restrained or wakened. But the operating temperature of the evaporator is nearly the same under the same heat load conditions. The inherent flow instability of the gas-liquid two phase flow can be enhanced by the acceleration effect which reinforces this unstable flow in reverse. Furthermore, the instability of the heat leak from the evaporator to the compensation chamber is enhanced. In addition, the cooling effect of the condenser can weaken the temperature fluctuation of the condensing pipe line.

     

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