![]() ![]() Slow, or gradual, decompression occurs slowly enough to go unnoticed and might only be detected by instruments. The risk of lung damage is still present, but significantly reduced compared with explosive decompression. Rapid decompression typically takes more than 0.1 to 0.5 seconds, allowing the lungs to decompress more quickly than the cabin. Military pilots with oxygen masks must pressure-breathe, whereby the lungs fill with air when relaxed, and effort has to be exerted to expel the air again. Immediately after an explosive decompression, a heavy fog may fill the aircraft cabin as the air cools, raising the relative humidity and causing sudden condensation. The risk of lung trauma is very high, as is the danger from any unsecured objects that can become projectiles because of the explosive force, which may be likened to a bomb detonation. Normally, the time required to release air from the lungs without restrictions, such as masks, is 0.2 seconds. Explosive decompression Ä®xplosive decompression occurs typically in less than 0.1 to 0.5 seconds, a change in cabin pressure faster than the lungs can decompress. The US Federal Aviation Administration recognizes three distinct types of decompression events in aircraft: explosive, rapid, and gradual decompression. The speed and violence of the decompression is affected by the size of the pressure vessel, the differential pressure between the inside and outside of the vessel, and the size of the leak hole. For the catastrophic failure of other pressure vessels used to contain gas, liquids, or reactants under pressure, the term explosion is more commonly used, or other specialised terms such as BLEVE may apply to particular situations.Äecompression can occur due to structural failure of the pressure vessel, or failure of the compression system itself. The term uncontrolled decompression here refers to the unplanned depressurisation of vessels that are occupied by people for example, a pressurised aircraft cabin at high altitude, a spacecraft, or a hyperbaric chamber. Air humidity immediately condenses into fog, which within seconds evaporates back into gas. In this test chamber, air pressure drops suddenly to that of the atmosphere at 60,000 ft (18,000 m).
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |