Abstract
Air pollution caused by the generated metallic fume during the progress of welding in a fabrication shop is one of unavoidable issues for labor health. Especially, a worker is likely to be exposed to high concentration of welding fume in semi-enclosed spaces such as cubic blocks under construction. For setting to cope with the pollution-control, it is necessary to take suitable measures considering the diffusing aspect of welding fume in a cubic block. However, this issue has the problem in which a ventilating way for purging fume should not disturb the welding arc and the shielding gas.
In collaboration with the measurements of distributional concentration of welding fume during manufacture of cubic block, the turbulent diffusing aspect of fume is numerically analyzed using the viscous eddy model in the condition of various ventilation systems and the way of low fume generation. Then, the effect of the measures for decreasing fume concentration on the working site in cubic block is investigated evidently on the base of calculated results.
