吴 丹， 黄 晨， 王 昕， 秦 俊.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Journal of Water Resources and Water Engineering[J].,2016,27(2):169-173
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
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.