通风房间气流分叉的研究  

STUDY ON AIR DISTRIBUTION BIFURCATION IN ROOM WITH MECHANICAL VENTILATION SYSTEM

作　　者：梁珍[1] 张吉礼[1] 陆亚俊[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,哈尔滨150090

出　　处：《低温建筑技术》2007年第3期107-109,共3页Low Temperature Architecture Technology

摘　　要：机械通风下的房间气流组织经常会出现分叉现象,弄清分叉的原因非常重要。本文主要分析了引起分叉的原因和影响分叉的主要因素。首先,文章在模拟计算的辅助下,理论分析了出现分叉的原因,发现当平面射流相对出射时可能出现分叉,而集中射流一般不出现分叉,并进一步得出Coanda效应是造成分叉的主要原因。最后,文章简单分析了影响分叉的主要参数。Bifurcation phenomena of air distribution often occur in the room with symmetrical supply vents and mechanical ventilation system, and has influence on the velocity and temperature fields of room. With the help of numerical simulation, it is found that bifurcation air distribution occurs in face to face planeshoot not in centralized shoot, through which it shows that Coanda effect is the main mechanism of bifurcation. Finally, the main parameters affected bifurcation were analyzed simply.

关 键 词：分叉 气流组织 平面射流 Coanda效应 

分 类 号：TU834.3[建筑科学—供热、供燃气、通风及空调工程]