风口上置置换通风及风口选型实验研究  

Up-fixing Displacement Ventilation and Experimental Study on Selecting Diffusers

作　　者：魏京胜[1] 王智伟[1] 马仁民[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院

出　　处：《建筑热能通风空调》2007年第3期10-14,共5页Building Energy & Environment

摘　　要：提出了风口上置的置换通风方案,并给出此种方案的特点和上置式置换通风风口的要求,推导了风口出风速度呈阶梯状分布的射流特性公式。以喷口为基础进行实验,筛选出了满足条件的风口型式,并给出了出风速度呈阶梯状分布时圆形射流轴线速度衰减公式。According to the disadvantages of Displacement Ventilation （DV） systems, the measure of diffusers which are fixed on the occupied zone of DV systems is presented. Based on advantages and disadvantages of the Up-Fixing Diffusers of DV （UFDDV） system, special conditions of the UFDDV system are brought forward in this thesis. The characteristics about the supply air jet of the UFDDV system are analyzed by using the theories of jet and the useful mathematic formulae of the diffuser is achieved originally, which air velocity distribution is uneven near the outlet. Thus the experiment is carried out in order to set up special conditions and select the form of diffusers. The satisfying form of the UFDDV diffusers is singled out while the useful mathematic formulae and parameters of the supply air velocity are confirmed.

关 键 词：风口上置式置换通风 送风口 射流 

分 类 号：TU834[建筑科学—供热、供燃气、通风及空调工程]