Oxygen Regulator Performance during Decompression.

摘要

Both static and dynamic performance characteristics of standard USAF oxygen regulators were evaluated during simulated decompression (loss of cabin pressurization), using the regulator test stand in conjunction with the decompression chamber at USAFSAM. A total of 10 regulators were tested, combining both torso- and panel-mounted types drawn from the standard USAF inventory. Outlet suction pressure, flow, positive pressure, and delivered oxygen dilution schedules were monitored and evaluated for two different decompression rates (4 and 8 seconds) while simulating the same total pressure change (10.9 psi to 4.4 psi) from 2,438 m to 9,144 m (8,000 to 30,000 ft). General findings indicate an extremely high initial pressure surge at the moment of decompression simultaneous with an immediate drop in the outlet P02 and a subsequent lag time before again maintaining a proper level of oxygen sufficiency at the flyer's mask. A minimum disruptive period of regulator performance was about 10-15 seconds but continued for a considerably longer time in many of the tests. (Author)