Abstract
Heat transfer during cooling of a heat-stressed surface in a small-sized channel by an annular and distributed array of flooded impact microjets of water and dielectric liquid Novec 7100 has been experimentally studied. The experimental setup is a copper block cooled by an array of microjets from nozzles with a diameter of 174, 327 μm and located at a distance of 1 mm from the surface. It has been established that the use of localized arrays of microjets makes it possible to obtain effective cooling of a heat-stressed surface with pumping energy comparable to energy costs for distributed microjets.
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