扭带管内高湿空气对流凝结换热三维数值模拟

Chinese Journal of Chemical Engineering ›› 2012, Vol. 20 ›› Issue (4): 686-692.

扭带管内高湿空气对流凝结换热三维数值模拟

崔永章¹; 田茂诚²; 张林华¹; 李广鹏¹; 朱建宾¹

¹ Key Laboratory of Building Energy Conservation Technique of Shandong Province, School of Thermal Engineer-ing, Shandong Jianzhu University, Jinan 250101, China ² School of Energy & Power Engineering, Shandong University, Jinan 250061, China

收稿日期:2011-06-30 修回日期:2012-02-07 出版日期:2012-08-28 发布日期:2012-02-07

Three dimensional numerical simulation of convection-condensation of vapor with high concentration air in tube with inserts

CUI Yongzhang¹; TIAN Maocheng²; ZHANG Linhua¹; LI Guangpeng¹; ZHU Jianbin¹

¹ Key Laboratory of Building Energy Conservation Technique of Shandong Province, School of Thermal Engineer-ing, Shandong Jianzhu University, Jinan 250101, China ² School of Energy & Power Engineering, Shandong University, Jinan 250061, China

Received:2011-06-30 Revised:2012-02-07 Online:2012-08-28 Published:2012-02-07

摘要/Abstract

摘要： A three-dimensional numerical model is presented for studying the convection-condensation of mixture with vapor in a tube with edgefold-twisted-tape inserts under transition flow. According to the diffusion layer theory and laminar species transport, a condensation model with user defined function is proposed and compared with heat and mass transfer analogy and experimental test. With the condensation model, the influences of gap width and op-erating parameters on thermal-hydrodynamics performance are simulated. As the gap width increases, convection and condensation heat transfer increase initially and then decrease, while convection heat transfer increases sharply and then decreases slightly. Increasing vapor fraction has a significant effect on condensation heat transfer but it has little effect on convective heat transfer. With the increase of inner wall temperature both convection and condensa-tion heat transfer all decrease and the ratio of condensation to total heat decrease dramatically. Increases inlet tem-perature mainly affects convection heat transfer.

关键词: condensation model, numerical simulation, transition flow

Abstract: A three-dimensional numerical model is presented for studying the convection-condensation of mixture with vapor in a tube with edgefold-twisted-tape inserts under transition flow. According to the diffusion layer theory and laminar species transport, a condensation model with user defined function is proposed and compared with heat and mass transfer analogy and experimental test. With the condensation model, the influences of gap width and op-erating parameters on thermal-hydrodynamics performance are simulated. As the gap width increases, convection and condensation heat transfer increase initially and then decrease, while convection heat transfer increases sharply and then decreases slightly. Increasing vapor fraction has a significant effect on condensation heat transfer but it has little effect on convective heat transfer. With the increase of inner wall temperature both convection and condensa-tion heat transfer all decrease and the ratio of condensation to total heat decrease dramatically. Increases inlet tem-perature mainly affects convection heat transfer.

Key words: condensation model, numerical simulation, transition flow

崔永章, 田茂诚, 张林华, 李广鹏, 朱建宾. 扭带管内高湿空气对流凝结换热三维数值模拟[J]. Chinese Journal of Chemical Engineering, 2012, 20(4): 686-692.

CUI Yongzhang, TIAN Maocheng, ZHANG Linhua, LI Guangpeng, ZHU Jianbin. Three dimensional numerical simulation of convection-condensation of vapor with high concentration air in tube with inserts[J]. Chin.J.Chem.Eng., 2012, 20(4): 686-692.

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