摘要
基于CFD软件和自然通风湿式冷却塔相关理论,对气流运动采用标准k-ε湍流模型,喷淋区和雨区采用离散相模型计算,对填料区建立了基于Poppe理论的数值求解模型。并通过编译自定义源项函数,实现其在FLUENT中的求解。基于该模型,在不考虑自然风情况下,对某300MW机组自然通风冷却塔的气水流动与热质交换进行数值模拟。分析了淋水密度、进塔水温和环境条件对冷却塔热力特性的影响。计算结果表明:基于CFD软件的冷却塔数值求解模型有很好的适用性,淋水密度和环境条件对出塔水温影响很大。
The software FLUENT and related theory are applied to study the heat and mass transfer as well as the air-water flow inside a natural draft wet cooling tower.The standard k-ε turbulence model is used to calculate the air flow and the discrete phase model is applied to simulate the spray and raining zone.A numerical model based on Poppe s theory for analyzing the performance of filling material is established.By using the user-defined source terms to represent the heat and mass transfer the model can solved ...
出处
《水利学报》
EI
CSCD
北大核心
2009年第2期208-213,共6页
Journal of Hydraulic Engineering
关键词
冷却塔
热力特性
离散相
数值模拟
cooling water tower
thermal performance
discrete phase
numerical simulation
