有对47章 INERT GAS SYSTEM 了解的吗，请进

2004tc · 发表于 2008-11-30 11:07:21

这个系统的工作原理是什么啊？希望知道的前辈给详细的讲解一下。谢谢拉

liuyi5521 · 发表于 2008-12-2 11:05:13

The nitrogen generation system gets bleed air from the left side
of the pneumatic manifold. A sensor on the bleed air duct sends
pressure data to the NGS controller. The controller adjusts the
NGS shutoff valve. The NGS shutoff valve controls the pressure
that comes into the system.
Bleed air goes through the catalytic converter to change the
ozone in the air to oxygen. Ozone can decrease the
performance and mechanical properties of the air separation
module.
The heat exchanger uses ram air to decrease the bleed air
temperature to 160 degrees +/- 10 deg F. The ram air valve
adjusts the quantity of cool air that goes through the heat
exchanger. The temperature sensor sends temperature data to
the controller. The controller adjusts the ram air valve.
The filter removes contamination before the air goes into the
air separation module. A differential pressure sensor monitors
the filter.
The air separation module decreases the oxygen in the air
below the quantity necessary to support combustion. The air
separation module removes oxygen from the air and releases it
overboard.
Nitrogen enriched air (NEA) goes through the high flow valve to
the center tank. The high flow valve controls the quantity of NEA
that goes to the center tank. The controller uses data from the
altitude sensor, differential pressure sensor, and airplane
systems to open or close the valve.
The NEA distribution system (NEADS) sends NEA to the center
wing tank. NEA goes into the tank through an ejector nozzle in
the climb vent in the left part of the tank. A float valve in the right
part of the tank makes sure that the concentration of NEA is
constant. A cross vent check valve makes sure that ambient air
does not dilute the nitrogen concentration in the center tank
during the descent.
The controller monitors and controls system operating
temperatures and pressures.
An operability indicator gives a visual indication of the condition
of the system.
47章是氮气发生系统的嘛，好像是局方有要求某年后进的飞机都必须改装这一系统。简单点说就是将引起来的空气先将臭氧氧化成氧气，然后通过热交换、过滤掉氧气，最后留下富氮的气体通到油箱，确保油箱的安全性！！！

2004tc · 发表于 2008-12-2 21:58:47

臭氧是极强的氧化剂，不能在氧化成氧气了。不过整个工作流程有臭氧的存在，现在还不是很清楚啊。

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[通用经验] 有对47章 INERT GAS SYSTEM 了解的吗，请进

广州民航职业技术学院