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- W2364999917 abstract "The press-in type ventilation is a ventilating method that is more adopted in tunnel construction.In order to research flow fields and gas distribution laws of press-in ventilating in construction with the gas tunnel bench cut method,this paper establishes a three-dimensional model by means of fluid mechanics software Fluent and performs numerical simulation,compares different setting distances from the air outlet of local fans and lower step surfaces and flow fields under the setting forms,and analyzes the influences of setting locations of local fans on distribution of gas concentration and air flow speed. The result of simulation show that under the condition of the same inlet speed,the further the local fans are from lower step surfaces,the more the gas concentration at frontal section of forward flow zone,the smaller the range of high-concentration gas area in recirculation zone,but the more the maximum concentration; and arrangement of local fans and air ducts on opposite sides can balance gas distribution in upper and lower step sections. This research provides a theoretical basis for putting forward the ways of improving ventilating effect." @default.
- W2364999917 created "2016-06-24" @default.
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- W2364999917 date "2015-01-01" @default.
- W2364999917 modified "2023-09-25" @default.
- W2364999917 title "Research on Flow Fields and Gas Distribution Laws of Press-in Ventilating and Gas in Construction of Highway Tunnels" @default.
- W2364999917 hasPublicationYear "2015" @default.
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