TESTING METHOD OF WIND CHANNEL FOR DIFFUSION OF AUTOMOBILE EXHAUST-GAS OF HALF-SUBWAY

摘要

PURPOSE: To provide the testing method of a wind channel for the diffusion of an automobile exhaust-gas on a half-subway, in which the quantity of respiration and mixed quantity not subject to the effect of turning-around to an adjacent opposite lane can be obtained univocally in the depressed road model of facing traffic. ;CONSTITUTION: The quantity of a gas flowing into a tunnel 14a at a time when the quantity of the gas Q is discharged from a point source 12 in a tunnel 13a is represented by S and the quantity of the gas flowing into a tunnel 14b by R, and an air exchange rate (q) (the quantity of respiration) with the outside air per a unit area in the opening section 6 of the top face of a depressed road, an air exchange rate q₀ (mixed quantity) on a section between lanes 10R, 10L at a central section 20 in the cross direction of a road and the quantities of turning-around q₁, q₂ to the tunnels 14b, 14a in the outlets of the tunnels 13a, 13b are computed.;COPYRIGHT: (C)1994,JPO&Japio