文档介绍：华北电力大学硕十学位论文摘要摘要文章以国内某600Mw直接空冷机组为例,针对当前空冷机组运行当中的突出问题一环境风的不利影响,采用标准七一￡湍流模型对空冷岛外部流场进行数值模拟。分析了特定风向条件下,不同的环境风速对空冷凝汽器性能的影响;借鉴目前煤厂等地安装防风网防风抑尘的经验,提出在空冷平台下部增设防风网以降低来流风速的措施,分析了不同结构特性(JI:孔率、结构尺寸)的防风网的阻风效果。并的出了既定模型下防风网的最佳丌孔率,从而为直接空冷机组的结构优化提供参考依据。关键词:直接空冷,数值模拟,防风网,标准七一￡模型 AB STRACT Some natiVe600MW direct air-cooling unitswas chosen astheexample,in view of serious problems of ai卜cooling units inrunning—t he unfaVorable innuence of EnVironmental Wind,the articleprOceeds numerical simulation research On exterior flow fieIdOf direct aircooling plalfbrm with standard 七一￡turbulent model,and analyzing the effect 0fdifferent Velocity on Ihe performance ofair-cooled cOndenser based on specific direction lessons from Preparation Plant’sexperiences installing topreVent wind and repress dusts,the article put fbrward a method erecting s under air—c00ling platfbrm fbr lOwing Velocity 0f wind flOw, analyzing windbreak-effect with different structure property(porosity、 size),ing to conclusion ofthe optimal porosity range for specified model, proViding reference basis for structural optimization of direct ai卜cooling un“s. Feng 1Yuchao(Fluid Machinery andEngineering) Djrected Changfu KEY WoRDS:direct air·cooHng,numerical simuIation,windbI.,standard 七一￡model 华北电力大学硕十学位论文摘要摘要文章以国内某600Mw直接空冷机组为例,针对当前空冷机组运行当中的突出问题一环境风的不利影响,采用标准七一￡湍流模型对空冷岛外部流场进行数值模拟。分析了特定风向条件下,不同的环境风速对空冷凝汽器性能的影响;借鉴目前煤厂等地安装防风网防风抑尘的经验,提出在空冷平台下部增设防风网以降低来流风速的措施,分析了不同结构特性(JI:孔率、结构尺寸)的防风网的阻风效果。并的出了既定模型下防风网的最佳丌孔率,从而为直接空冷机组的结构优化提供参考依据。关键词:直接空冷,数值模拟,防风网,标准七一￡模型 AB STRACT Some natiVe600MW directair-cooling unitswas chosen as theexample,in view of serious problems of ai卜cooling units inrunning—t he unfaVorable innuence of EnVironmental Wind,the articleprOceeds numerical simulation research On exterior flow fieIdOfdirect aircooling plalfbrm with standard 七一￡turbulent model,and analyzing the effect 0f different Velocity on Ihe performance of air-cooled cOndenser based on specific direction lessons from Prep