S0503-1-4 トンネル坑口集中排気の1次元差分解析による坑口持出し予測法(トンネルの空気力学、換気、火災(1))

概要

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In some longitudinally ventilated tunnels with one-way traffic, carry-out of polluted air from portal is reduced by installing a massive ventilation system near the portal. In our former work, we have made it possible to evaluate quantitatively the carry-out from portal by means of 3D numerical analysis, in which moving vehicles were directly modeled. In the current paper we established the estimation method of carry-out characteristic by 1D finite difference method, based on the 3D analysis. In this process, the diffusion coefficients in 1D were found through comparison with the results of 3D analysis. Also the diffusion process outside the tunnel was modeled, which can represent the carry-out characteristic due to wake flow by vehicles.
一般社団法人日本機械学会の論文
2009-09-12