= Transpiration cooling
{wiki=Transpiration_cooling}
Transpiration cooling is a process used primarily in aerospace engineering and thermal management systems to dissipate heat from surfaces, particularly in extreme conditions such as high-speed flight or re-entry into the Earth's atmosphere. The technique involves the use of a porous material through which a cooling fluid, typically water, is passed. This fluid is vaporized or evaporated at the surface, absorbing heat in the process and effectively cooling the material.
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