らせん管内を流れる固気二相流の熱伝達
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概要
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Experimental study was performed on the convective heat transfer of gaseous solid suspension flow within helically coiled circular tubes. The results show that the increase in heat transfer due to the presence of the solid phase is greater than the contribution of the increased heat capacity as the flowing media. This suggests that the addition of the suspended phase into the flows with curved stream lines can bring about the substantial reduction in the convective heat transfer resistance in the vicinity of the channel walls of the outer curvature portion. However, slight decrease in mixture Stanton number is also observed at the slight loading ratio region and the sublayer disturbing effect is seen to be gradully saturated at the higher loading region. Accordingly, general reduction in the turbulence level also exists in the turbulent core region of the flow, and there is an optimum solid loading ratio at which the viscous sublayer disturbing is expected to be most effective.
- 九州大学大学院総合理工学研究科の論文
- 1984-06-01
九州大学大学院総合理工学研究科 | 論文
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