The age of air in the workaround of a manned spacecraft cabin that contain astronauts, apparatus and simple living establishments was numerically simulated by use of commercial software and a standard k-e turbulence model. An air inlet installed in the two top corners with a removed stagger mode supplied the air. Simulation results showed that the less the supply angle, the fresher the air, and the greater the air exchange efficiency. A 0? supply angle is advised if no block is in the ceiling.
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