Bleed air | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-10-04

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Bleed_air


00:01:03 1 Uses
00:03:08 2 Contamination
00:05:15 3 Bleedless aircraft
00:05:58 3.1 Benefits
00:07:18 3.2 Tradeoffs
00:08:05 4 See also



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Speaking Rate: 0.9900516892010206
Voice name: en-AU-Wavenet-A


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SUMMARY
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Bleed air is compressed air taken from the compressor stage of a gas turbine upstream of its fuel-burning sections.  Automatic air supply and cabin pressure controller (ASCPCs) valves bleed air from high or low stage engine compressor sections. Low stage air is used during high power setting operation, and high during descent and other low power setting operations. Bleed air from that system can be utilized for internal cooling of the engine, cross-starting another engine, engine and airframe anti-icing, cabin pressurization, pneumatic actuators, air-driven motors, pressurizing the hydraulic reservoir, and waste and water storage tanks. Some engine maintenance manuals refer to such systems as "customer bleed air". Bleed air is valuable in an aircraft for two properties: high temperature and high pressure (typical values are 200–250 °C and 275 kPa (40 PSI), for regulated bleed air exiting the engine pylon for use throughout the aircraft).