Dust Diffusion Simulation in the Third Layer Construction of Underground Powerhouse  

作　　者：王晓玲 张自强 李涛 刘雪朋 

机构地区：[1]School of Environmental Science and Engineering,Tianjin University

出　　处：《Transactions of Tianjin University》2009年第2期135-139,共5页天津大学学报（英文版）

基　　金：Supported by Natural Science Fund ation for Major Research Plan of China (No.90815019);National Natural Science Foundation of China (No.50879053);National Key Project of Scientific and Technical Supporting Programs Funded by Ministry of Science and Technology of China (No.2006BAB04A13)

摘　　要：Under forced ventilation,the dust diffusion of underground powerhouse construction is investigated using a 3D high Reynolds number k-ε model.The interfacial momentum transfers and the wall roughness in the wall function are considered.Ventilation in the third layer of underground powerhouse of Xiangjiaba hydropower station is used as a case.The geometric structure has a decisive effect on the airflow distribution.It is concluded that the dust concentration decreases gradually with the increase of the ventilation time.However,iso-concentration curves have the same tendency after 1 800 s.The dust concentration meets the ventilation and dust-prevention health standard after 2 300 s.The prediction by the present model is confirmed by the experimental measurement by Nakayama.Under forced ventilation, the dust diffusion of underground powerhouse construction is investigated using a 3D high Reynolds number k-ε model. The interfacial momentum transfers and the wall roughness in the wall function are considered. Ventilation in the third layer of underground powerhouse of Xiangjiaba hydropower station is used as a case. The geometric structure has a decisive effect on the airflow distribution. It is concluded that the dust concentration decreases gradually with the increase of the ventilation time. However, iso-concentration curves have the same tendency after 1 800 s. The dust concentration meets the ventilation and dust-prevention health standard after 2 300 s. The prediction by the present model is confirmed by the experimental measurement by Nakayama.

关 键 词：dust concentration construction ventilation numerical simulation underground powerhouse third layer 

分 类 号：TU834.6[建筑科学—供热、供燃气、通风及空调工程]