Effects of Orientation and Elevated Acceleration on the Cooling Performance of a Centrifuge-Mounted Spray Cooling System

摘要

A two-nozzle spray cooling system (R-134a) was installed on an 8- foot-diameter centrifuge table to test the effects of elevated acceleration on steady state cooling performance. Acceleration effects were evaluated in four orientations relative to the acceleration vector, which ranged from 1-10 g's. The 2-cm2 heated surface removed heat fluxes up to 250 W/cm2 in all test cases, and small performance improvements were seen at high accelerations in certain orientations. Additionally, the vertical spraying upward and horizontal spraying orientations demonstrated improved cooling over the nominal downward spraying orientation, with a decreasing effect as radial acceleration increased.