Firstly, this paper aims to demonstrate experimentally the heat transfer performance of dense gas-solid suspension impinging jet for divertor cooling of the fusion power reactor. Prior to the experimental study, a tentative goal of 20kW/m~2K was set as the heat transfer coefficient based on the expected temperature level of both coolant and divertor plate materials. The goal value can be achieved at relatively dilute condition of solid loading ratio, which is considered to be due to the additive production of turbulence by particles' wake. Secondly, the fundamental heat transfer characteristic for the array of gas-solid suspension impinging jets were examined experimentally, because little study of multiple impinging jet heat transfer of gas-solid suspension media exists in spite of necessity of it for cooling of an actual wide divertor plate. From the latter experiments, it was founded that the heat transfer performance was enhanced due to solid particles only near the stagnation point and the effect of solid particles on enhancement of heat transfer coefficient was saturated at the jet-to-jet spacing region. Therefore, it is important to force the particles after bouncing near stagnation point to re-impact on the heat transfer surface at the jet-to-jet spacing region to improve the heat transfer performance in that place
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