Volume 34 Issue 8
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Experiment on flow boiling heat transfer in 1.002 mm tube under hypergravity[J]. Journal of Aerospace Power, 2019, 34(8): 1644-1651. doi: 10.13224/j.cnki.jasp.2019.08.002
Citation: Experiment on flow boiling heat transfer in 1.002 mm tube under hypergravity[J]. Journal of Aerospace Power, 2019, 34(8): 1644-1651. doi: 10.13224/j.cnki.jasp.2019.08.002
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Experiment on flow boiling heat transfer in 1.002 mm tube under hypergravity

doi: 10.13224/j.cnki.jasp.2019.08.002
  • Received Date: 2019-01-07
  • Publish Date: 2019-08-28
    Abstract
  • An experiment investigation of R134a flow boiling heat transfer in a 1.002 inner diameter mini-tube under hypergravity was carried out, with the hypergravity environment being achieved using a centrifugal acceleration machine. Results showed that a remarkable difference existed in flow boiling heat transfer between hypergravity and normal gravity. The heat transfer under hypergravity was stronger than that under normal gravity in the gravity of 3.16g (g=9.8 m/s2). With the increase of gravity, heat transfer coefficients increased at first and then decreased. The transition took place around 1.1g-1.4g. At 3.16g, some heat transfer coefficients became smaller than those at normal gravity. The effects of vapor quality on the heat transfer varied with gravity. The applicability of correlations for flow boiling heat transfer under normal gravity to hypergravity was also evaluated, and those having good prediction performances for hypergravity were identified.

     

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