Pressure drop and heat transfer for flow-boiling of water in small-diameter tubes

被引:21
作者
Kureta, M [1 ]
Kobayashi, T
Mishima, K
Nishihara, H
机构
[1] Japan Atom Energy Res Inst, Tokai, Ibaraki 3191195, Japan
[2] Kobe Steel Ltd, Nishi Ku, Kobe, Hyogo 6512271, Japan
[3] Kyoto Univ, Inst Res Reactor, Kumatori, Osaka 5900494, Japan
关键词
pressure drop; heat transfer; forced convection; boiling; multiphase flow; pipe flow;
D O I
10.1299/jsmeb.41.871
中图分类号
O414.1 [热力学];
学科分类号
摘要
Pressure drop and heat transfer for flow-boiling of water in small-diameter tubes under atmospheric pressure were discussed. The results of experiments were compared with those of several existing correlations and models. The experiments were carried out using atmospheric-pressure water in tubes with inner diameter D ranging from 2.0 to 6.0 mm, heated length L from 4.0 to 680.0 mm, inlet water subcooling Delta T-in from 70 to 90 K, and mass velocity G from 100 to 10 170 kg/ (m(2)s). The highest heat flux q attained was 33 MW/m(2). Interesting phenomena were observed in small-diameter tubes with a very short heated length. The most suitable correlations for predicting the pressure drop and heat transfer in small-diameter tubes were also discussed.
引用
收藏
页码:871 / 879
页数:9
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