737NG飞机的引气系统图在哪个章节？

sptbone · 发表于 2013-6-7 10:22:30

737NG飞机的引气系统图在哪个章节？是不是第9级供气时，第5级关闭？还有APU引气有单向活门，为什么还会出现APU反压？谢谢

路飞 · 发表于 2013-6-7 10:28:53

31章吧！

lanjun · 发表于 2013-6-7 15:17:50

章节36-11

5th and 9th Stage Engine Bleeds

Bleed air comes from the 5th and 9th stages of the engine high stage compressor. At low engine speed, 5th stage air is not sufficient for the pneumatic system demands and the 9th stage supplies bleed air. At high engine speed the high stage valve closes, and the 5th stage supplies bleed air. The high stage regulator controls the high stage valve. High stage valve operation is automatic.

An APU check valve is in the APU duct. This valve protects the APU from engine bleed air flow

The valve lets air flow in the direction of the arrow and prevents air flow in the opposite direction.

Normal airflow opens the flappers, reverse airflow closes the flappers.