Abstract
In order to investigate boiling heat transfer of a porous body with a crack, alumina porous body was additivemanufactured on the basis of powder bed fusion method. Alumina was selected for its heat resistant property and similarity of a crust of molten core. The manufactured porous body with 30% porosity has a slit-shape crack. Additive manufacturing became possible with the optimized operating parameters, powder size distribution, and the specific sintering assistant. A metal foil was attached on the back side of porous body and heated by applied direct electric current. The temperature profile of the metal foil was estimated on the basis of acquired electric-resistance distribution. As a results of pool boiling experiment in a salt-water pool, the boiling heat-transfer performance was acquired as a function of heat-transfer levels.
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