A224 宇宙用狭隘流路沸騰熱交換器における限界熱流束の増大

概要

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To develop compact high-performance space heat exchangers, experiments on the increase of CHF for a narrow heated duct between parallel plates were conducted. In order to avoid burnout phenomena due to the vapor blanketing in the heated channel, unheated auxiliary channels for liquid flow are attached to the both sides of the heated one. From these auxiliary liquid channels, liquid is supplied underneath flattened bubbles by capillary pressure difference. As the result, critical heat fluxes are increased up to two times higher than those for a flat surface without auxiliary liquid supply. Even for the gap size of 2mm, obtained CHF values for the grooved surface are almost the same as those for pool boiling, and on the other hand, the same CHF values could be possible for the grooved surface at the inlet liquid velocity one order smaller than that for the flat surface.
社団法人日本機械学会の論文
2002-11-06