基于液态缩尺模型的大空间下送中回分层空调回风汇流速度场研究  

Study on velocity flow field near air return inlet with stratified air conditioning of low sidewall air supply and middle sidewall air return in large space building based on liquid scale model

作　　者：吴丹[1] 黄晨[1] 王昕[1] 秦俊 

机构地区：[1]上海理工大学环境与建筑学院,上海200093 [2]上海融创绿城投资控股有限公司,上海200050

出　　处：《水资源与水工程学报》2016年第2期169-173,共5页Journal of Water Resources and Water Engineering

基　　金：国家自然科学基金项目(51278302;51108263);沪江基金(D14003)

摘　　要：选择某大空间实型建筑,根据相似理论建立液态模型实验台,研究大空间下送中回分层空调回风流场的汇流特性。论文利用二维微元汇流叠加方法获得汇流速度理论公式,利用粒子图像测速技术PIV(Particle Image Velocimetry)拍摄回水流场,获得其速度矢量信息;实验发现计算得到回风流场的理论速度值与实验速度值存在较大的偏差,对二维汇流速度理论公式修正后,平均相对误差减少到8.5%。论文最后通过相似比例提出大空间下送中回分层空调回风二维汇流速度半经验公式,这为大空间建筑下送中回热环境研究提供了理论参考。The paper chose a large space real building and established an experimental station of liquid scale model according to similarity theory. It studied the convergence characteristics of stratified conditioning air flow in large space. The theory formula of convergence velocity is derived by two-dimensional micro-unit speed superposition method. Return water flow field is shot by PIV （Particle Image Velocimetry） technology so as to get velocity vector information;it was found there is a large velocity deviation between the calculated and experimental values in return water flow velocity field, however, the deviation is greatly reduced to 8.5% after revising the two-dimensional theory formula are by use of experimental data. Finally, the paper proposes the semi-empirical formula of two-dimensional suction velocity in large space with stratified air conditioning of low sidewall air supply and middle sidewall air return by similar proportion. The result can provide a theoretical reference for the study of thermal environment in large space building.

关 键 词：液态缩尺模型 大空间下送中回 粒子图像测速技术 汇流速度场 二维汇流速度半经验公式 

分 类 号：TU831.8[建筑科学—供热、供燃气、通风及空调工程]