摘要
基于自然通风原理,对所研制的自动捕风排风装置的通风性能进行了优化分析.通过数值模拟和实验研究,重点分析了排风口几何形状与其表面自然通风风压系数的关系,以及提高其排风性能的关键参数.研究结果表明,圆锥形渐扩口的综合排风性能为最佳,较无渐扩口的排风口可提高排风量14.3%;所研制的自动捕风排风装置在北京地区冬季典型天利用自然通风即可使房间获得8次/h的换气次数,节能效果显著.
Based on the natural ventilation theory,the ventilation performance optimization of a new automatic wind catcher was proposed.Numerical simulation and experiment were carried out to study the relationship between the shape of exhaust grill and the wind pressure coefficient on its surface.In addition,the key parameters which enhanced the exhaust performance were proposed.The result has shown that the form with the best exhaust performance is the conical increaser.Compared with the wind catcher with no increaser,the exhaust rate of the conical increaser has improved by 14.3%.Furthermore,the wind catcher can achieve an air change rate of 8 times per hour in the typical weather of the winter in Beijing,which has a remarkable energy-saving effect.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第11期30-35,共6页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(50678006)
'十一五'国家科技支撑计划资助项目(2007BKA12B07)
关键词
自动捕风排风装置
自然通风
排风口性能优化
模拟
实验
wind catcher
natural ventilation
optimization of the exhaust grill
simulation
experiment
作者简介
陈超（1958-），女，湖南长沙人，北京工业大学教授，博士生导师 通讯联系人，E-mail：chenchao@bjut．edu．cn
