堵头管中轴对称紊动射流的实验研究  

Experimental study of an axisymmetric turbulent jet discharged into a dead-end tunnel

作　　者：李玉柱[1] 孙春柳[1] 

机构地区：[1]清华大学

出　　处：《暖通空调》1996年第5期14-20,35,共8页Heating Ventilating & Air Conditioning

基　　金：国家自然科学基金<紊动射流卷吸掺混机理与几种环境射流特性>研究成果之一

摘　　要：介绍了采用热膜流速仪量测堵头管中不同受限度轴对称射流的时均流速和流速脉动。根据实验,把堵头管中射流分为自由扩展区、受限扩展区、收缩区和零均流区四个区,并给出了临界断面位置,对现有计算方法进行了改进。Measures the time mean velocity and velocity fluctuation using a hot film anemometer with different confinement ratio for the axisymmetric turbulent jet in a dead-end tunnel.By analysing the data from the measurement,proposes the division of four flow regions-the free spread,confined spread,contraction and zero-time-averaged-flow regions,and the criterion and flow characteristics for each of them,with a few new empirical formulas derived.

关 键 词：暖通空调 紊动射流 堵头管 轴对称 实验 

分 类 号：TU831.7[建筑科学—供热、供燃气、通风及空调工程]