タンカー荷油の放熱に対する動揺の影響

概要

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A 1/50 scale model of side tanks of a tanker is used in this experiment to know effects of rolling on the heat transfer from shell walls. Results of the experiment are as follow. (1) The temperature of oil in the tank becomes uniform when rolling occurs. (2) The heat tansfer coefficient increases almost linear according to the angle and frequency of rolling. (3) Fin effect of stiffners is little, then their size and material affects little the heat transfer from stiffners. They work mainly as mixers of oil in tanks. Empirical equations for increments in the heat transfer coefficient by rolling are given as, [numerical formula] …… for side shell [numerical formula] …… for bosom shell, where [numerical formula] and [numerical formula]. (Δα : increment in heat transfer coefficient, ι : stiffner space, λ : thermal conductivity, θ : rolling angle, b : half breadth of tank, T : rolling period, ν : kinematic viscosity.)
社団法人日本船舶海洋工学会の論文