Investigation of the Impinging Jet Boiling Heat Transfer
Date Issued
2006
Date
2006
Author(s)
Yeh, Fang-Shen
DOI
zh-TW
Abstract
We construct an experiment system to investigate the heat transfer phenomenon at the stagnation region of an impinging jet with a unitary ratio of jet cross section and heat transfer area. Thereafter, a critical heat flux equations deduced from the experimental results was obtained. All experiment data was measured in steady state. Experiments were carried out at heat transfer surface diameters of 4~8mm, jet velocities of 0.5~2.0m/s and liquid subcooling of 20℃ and 30℃. With the parameter varying, we can interpret the heat transfer mechanism in each boiling region. Besides, the maximum CHF and wall superheat were 522W/cm2 and 37℃, recorded at heat transfer surface diameter of 8mm,jet velocity of 2.0m/s and liquid subcooling of 30℃. Finally, we deduce an equation to forecast the critical heat flux in jet stagnation region within a 15% error.
Subjects
噴柱
臨界熱通量
沸騰熱傳
停滯區對流
Jet
Critical heat flux
boiling heat transfer
stagnation zone force convection
Type
thesis
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