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Volume 42 Issue 1
Jan.  2016
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Journal of Beijing University of Aeronautics and Astronautics  > 2016  >  42(1): 152-157.
JIA Zhouxia, XU Guoqiang, WEN Jie, et al. Investigation of mixed convection of supercritical pressure RP-3 in vertical round tube[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(1): 152-157. doi: 10.13700/j.bh.1001-5965.2015.0066(in Chinese)
Citation: JIA Zhouxia, XU Guoqiang, WEN Jie, et al. Investigation of mixed convection of supercritical pressure RP-3 in vertical round tube[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(1): 152-157. doi: 10.13700/j.bh.1001-5965.2015.0066(in Chinese)
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Investigation of mixed convection of supercritical pressure RP-3 in vertical round tube

doi: 10.13700/j.bh.1001-5965.2015.0066

  • National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

Funds:  National Natural Science Foundation of China (50676005)
  • Received Date: 30 Jan 2015
  • Publish Date: 20 Jan 2016
    Abstract
  • The mixed convection research of supercritical pressure hydrocarbon aviation fuel RP-3 in vertical tube was conducted and the effects of buoyancy and thermophysical properties on convection was investigated. The wall heat fluxes (200-500 kW/m2), inlet pressure (3-5 MPa) and inlet Reynolds number (5 000-10 500) were maintained in the experiments. The study shows that heat transfer impairment occurrs in inlet region for all upward flow conditions due to buoyancy effects, which is not observed in the downward flow. The heat transfer coefficient increases as the fluid bulk temperature increased as a result of comprehensive effects of thermophysical properties. At lower inlet Reynolds number (5 700), the radial velocity profile changes in downward flow conditions leading to heat transfer enhancement due to buoyancy effects. The buoyancy effects are also significant for higher inlet Reynolds number (10 500). The criterion equation (Bo* < 5.6×10-7) failed to evaluate buoyancy effects on hydrocarbon fuel heat transfer.

     

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