高温鋼板のラミナフロー冷却の冷却能に関する解析

概要

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The cooling process of a hot steel plate in the forced cooling of the laminar water flow was experimentally and analytically discussed. The main results obtained in this paper are as follows : 1) The heat transfer coefficient α of the forced cooling of the laminar water flow can be deduced as "α=500・(θ_S-θ_W)^<1/2>" where θ_S and θ_W are the temperature of the cooled surface and the cooling water, rerspectively. 2) The radius R_B of the circular black zone can be described as "R_B=a√<t>" where t is the cooling time and a is the constant determined by the water flow rate and the vertical distance between a nozzle exit and cooled plate surface. 3) The cooling curve calculated at a given point in the steel plate using the heat transfer coefficient indicated in 1) agrees with the experimental cooling curve when the water cooling diameter R_W is assumed to be "R_W=√^a<t>+10".
社団法人日本鉄鋼協会の論文
1981-05-01