MAE135 Homework No. 4 Spring 2010 Date assigned: Tuesday, April 20, 2010 Due date: 5:00 pm, Tuesday, April 27, 2010 PROBLEM 1 (15 points) A dangerous situation develops inside a spacecraft that requires careful calculation. The astronauts detect a leak (probably due to a puncture by space debris) and activate valves that deliver to the cabin air from pressurized bottles stored onboard the vehicle. They note that a Fow rate of 0.001 kg/sec maintains the cabin pressure at the desired 100 kPa. At some point the bottles will be emptied and the crew must know how much time is left before the cabin pressure drops to 50 kPa, at which point the spacecraft becomes uninhabitable. This task falls on your shoulders as engineer in mission control: you need to inform the crew how much time they can stay in the vehicle after the bottles are emptied. Here are some critical data: Cabin volume = 10 m 3 . Cabin initial pressure (before bottles are emptied) = 100 kPa
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This note was uploaded on 08/31/2010 for the course ENGRMAE 135 taught by Professor Staff during the Spring '08 term at UC Irvine.