大型循环水凉水塔内部空气流场数值模拟及优化研究  

Numerical Simulation and Optimization Study on the Internal Air Flow Field in Large Circulating Water Cooling Tower

作　　者：白庭河[1,2] 达宇博 BAI Ting-he;DA Yu-bo(CNPC Lanzhou Petrochemical Co.;School of Petrochemical Engineering,Lanzhou University of Technolog;Lanzhou Xigu Urban and Rural Development&Investment Co.,Ltd.)

机构地区：[1]中国石油兰州石化公司 [2]兰州理工大学石油化工学院 [3]兰州市西固区城乡发展投资有限公司

出　　处：《化工机械》2024年第4期533-538,共6页Chemical Engineering & Machinery

摘　　要：通过对某石油化工企业循环冷却水系统凉水塔内部轴流风机流场进行数值模拟研究,掌握凉水塔内部空气流场的紊流程度对轴流风机流量、全压和轴功率的影响规律。根据现场测绘数据建立基于Mixture的凉水塔内部空气流场三维紊流流体动力学模型,通过对实际运行数据与CFD数值模拟结果的比较分析,验证了所建模型的正确性。通过增加导流罩对凉水塔内部空气流场结构进行优化设计,降低了凉水塔内部空气流场的紊流程度,在轴流风机流量、全压基本不变(不牺牲轴流风机冷却能力)的情况下,实现了降低轴流风机轴功率,提高风机运行稳定性的目的。Through simulating and investigating the axial fan’s flow field in the cooling tower of a petrochemical enterprise’s circulating cooling water system,obtaining the effect rule of the air flow field’s turbulence degree which influencing the axial fan’s flow rate,total pressure and shaft power within the cooling tower,having the field surveying and mapping data based to establish a three-dimensional turbulent hydrodynamic model of the air flow field inside the cooling tower was implemented,including comparatively analyzing both actual operation data and CFD simulation results to verify correctness of the model established.The results show that,adding the guiding hood can optimize the structure of the air flow field inside the cooling tower,reduce the degree of turbulence there;in addition,under the condition of basically keeping the axial fan’s flow rate and full pressure unchanged(without sacrificing the cooling ability of the axial fan),reducing the axial fan’s axial power and improving its operation stability can be realized.

关 键 词：凉水塔 内部空气流场 结构优化 数值模拟 

分 类 号：TQ053.5[化学工程]