大型火电厂空冷凝汽器支架结构风洞数值模拟  

Wind tunnel numerical simulation on air cooled support structure in large thermal power plants

作　　者：姚泽良[1] 白国良[2] 李晓文[2] 焦江伟[2] 

机构地区：[1]西安理工大学水利水电学院,陕西西安710048 [2]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《西安建筑科技大学学报（自然科学版）》2009年第6期834-840,共7页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50778150);陕西"13115"科技创新重大项目(2007ZDKG39);陕西省科技攻关项目(2006k07-g24);陕西省科技产业化项目(06JC12);西安市科技攻关项目(GG06024)

摘　　要：空冷凝汽器支架结构是大型火力发电厂采用的一类特殊工业建筑,属典型的钢-混凝土竖向混合结构.运用FLUENT软件对某大型空冷支架结构表面风荷载进行数值模拟,计算了三种不同挡风墙形式和三种不同风向角作用下空冷支架结构的整体体型系数,研究了各工况下结构的A型架和挡风墙风压分布规律,分析了挡风墙形式对A型架上部气流流向的影响,得到了在最合理的挡风墙形式下A型架和挡风墙各区的体型系数.最后,将最合理挡风墙形式下各区的体型系数与风洞试验结果进行了对比分析,结果表明,数值风洞模拟结果与风洞试验结果吻合较好.Air cooled condenser support structure in large thermal power plants is a new special industrial structure. It is a typical steel concrete vertical hybrid structure. The surface wind load on an air cooled condenser support structure is simulated with FLUENT software. The structural shape coefficients under three different wind break wall styles and three different wind direction angles Were calculated. Wind pressure distribution law on the structural A type structure and wind break wall under all conditions was studied. Airflow direction at the top of A type structure under different windbreak wall styles was analyzed. Shape coefficients on the wind-break wall and A shape structure under the most reasonable wind-break wall style were obtained. The results of the numerical simulation and wind tunnel experiment were comparatively analyzed. Results show that the numerical simulation results are consistent with the wind tunnel experiment results.

关 键 词：空冷凝汽器 钢-混凝土竖向混合结构 风洞数值模拟 挡风墙 体型系数 

分 类 号：TU271.1[建筑科学—建筑设计及理论]