Experimental and simulation study on a novel uniform air/smoke exhaust device in subway

4th Asia Conference of International Building Performance Simulation Association

土木建筑工程

Meng, Hua^1 ; Wang, Hai^1 ; Ming, Gang^1 ; Wang, Lihui^2 ; Wu, Xiping^1

School of Mechanical Engineering, Tongji University, No. 1239, Siping Road, Shanghai

200092, China^1

School of Environment and Architecture, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai

200093, China^2

关键词: Air exhaust;    Airflow resistance;    Exhaust ducts;    Internal flow field;    New devices;    Real sizes;    Simulation studies;    Subway tunnels;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/238/1/012022/pdf
DOI  :  10.1088/1755-1315/238/1/012022

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

A novel π-shape device (π-D) was developed based on air full pressure supply theory to realize the uniform air/smoke exhaust for long duct with enormous vents in subway tunnel. To validate its performance, numerical simulation of internal flow field of the duct with π-D was conducted. Then an experimental 65-meter-long exhaust duct with π-Ds was set up in accordance with the real size. The air exhaust velocities of each vent and the total head losses along the main duct were measured. Both experimental and simulation results showed that the proposed new device could be designed and equipped flexibly into the long air/smoke exhaust duct. It would significantly enhance the ventilation uniformity, reduce the airflow resistance by 50%-65%, and achieve above 20% of distribution energy saving as well.