IGV叫什么 有什么作用呢

zouguocheng

在49-50-00有描叙
Purpose
The inlet guide vanes control the air flow to the load
compressor. THe IGV actuator controls the IGV position.
Physical Description
Sixteen inlet guide vanes (IGVs) are inside the APU around the
load compressor inlet. These are the parts in the inlet guide
vane assembly:
* Inlet guide vanes (16)
* Ring gear
* Support assembly
* Segment gears (16).
The inlet guide vane actuator (IGVA) is on the right side of the
compressor. These are the actuator components:
* Electrical connector
* Linear variable differential transformer (LVDT)
* Actuator rod
* Fuel inlet line
* Fuel return line
* Drain line.
Functional Description
The inlet guide vanes turn between 15 degrees (fully closed) to
115 degrees (fully open). The vanes do not fully close. The
vanes are set to stop at the 15 degrees position to cool the load
compressor.
The actuator receives signals from the ECU and uses fuel
pressure from the FCU to move the vanes. The ECU controls the
inlet guide vanes to the correct angle by the air demand from
the airplane.
Training Information Point
The IGV position shows on the CDU in the flight compartment