摘要
建立了气-液两相流二维计算流体力学(CFD)模型,运用Fluent软件对板式蒸发式冷凝器板束中气-液两相的逆流、并流两种操作进行了模拟,直观地表征了板束中喷淋水流量、风速及风向对水膜流动的影响,并用水蒸气对两种操作进行了传热实验研究.模拟分析得出的结论与实验结果吻合甚好,表明空气与水并流比逆流更有利于利用液体薄膜强化传热的特性.
In this paper, a two-dimension computational fluid dynamics （CFD） model of the gas-liquid two-phase flow was established, and the countercurrent and parallel operations of the two-phase flow in the plate bundles of a plate-type evaporative condenser were simulated by means of the Fluent software, thus directly illustrating the influences of the water spray flow, wind velocity and wind direction in the plate bundles on the flow of water film. An experimental investigation into the heat transfer of the two operations was then performed, with water vapor as the heat transfer medium. It is shown that the simulated resuhs accord well with the experimental ones, meaning that the parallel flow of air and water is superior to the countercurrent flow in making use of enhanced heat transfer of fluid film.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第7期6-10,共5页
Journal of South China University of Technology(Natural Science Edition)
基金
广东省自然科学基金重点资助项目(04015950)
关键词
冷凝器
CFD模拟
强化传热
降膜
板束
condenser
CFD simulation
enhanced heat transfer
falling film
plate bundle
