DOC AIRBUS | AMM A320FFORWARD COMPRESSOR STATOR ASSEMBLY - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
1. General
The High Pressure Compressor (HPC) forward compressor stator assembly is composed of:
** ON A/C NOT FOR ALL The High Pressure Compressor (HPC) forward compressor stator assembly is composed of:
Forward And Rear Compressor Stator Assembly- Inlet Guide Vanes (IGVs)
- Forward compressor stator case
- Stage 1-4 Variable Stator Vanes (VSVs).
2. System Description
A. IGV
The IGVs, at the inlet to the HPC, are used to convert air velocity increase into pressure rise and direct air from the booster to the stage 1 high pressure compressor rotor blades for the optimum incidence angle and converts air velocity to air pressure. The IGVs are physically parts of the fan hub frame.
The IGVs, at the inlet to the HPC, are used to convert air velocity increase into pressure rise and direct air from the booster to the stage 1 high pressure compressor rotor blades for the optimum incidence angle and converts air velocity to air pressure. The IGVs are physically parts of the fan hub frame.
B. Forward Compressor Stator Case
The forward compressor stator case is made of two matched case halves with flanges at the 3 and 9 o'clock positions. It contains borescope ports at each HPC stage for internal inspections and a stage 4 bleed port. It also contains air seals at the inner diameter of the stage 1-4 compressor stator shrouds to prevent air from leaking into the previous HPC stage.
The forward compressor stator case is made of two matched case halves with flanges at the 3 and 9 o'clock positions. It contains borescope ports at each HPC stage for internal inspections and a stage 4 bleed port. It also contains air seals at the inner diameter of the stage 1-4 compressor stator shrouds to prevent air from leaking into the previous HPC stage.
C. VSVs
The VSVs are used to direct the air to the next higher HPC stage. The VSVs control and direct the airflow through the front stator case to optimize performance and prevent compressor stalls in all operating conditions.
The VSVs and IGVs are mechanically interconnected and controlled with linkage external to the forward compressor stator case. The angle is controlled as needed by the EEC in order to increase or decrease airflow through the HPC front stator assembly.
The VSVs are used to direct the air to the next higher HPC stage. The VSVs control and direct the airflow through the front stator case to optimize performance and prevent compressor stalls in all operating conditions.
The VSVs and IGVs are mechanically interconnected and controlled with linkage external to the forward compressor stator case. The angle is controlled as needed by the EEC in order to increase or decrease airflow through the HPC front stator assembly.
3. Operation
The HPC forward stator assembly compresses diffuses, and directs the accelerated air from the booster and IGV to the HPC rotor blades at an optimum incidence angle. As the speed of the HPC rotor increases, IGVs and VSVs will axially open. When the speed of the HPC rotor decreases, IGVs and VSVs will axially close.
The HPC forward stator assembly compresses diffuses, and directs the accelerated air from the booster and IGV to the HPC rotor blades at an optimum incidence angle. As the speed of the HPC rotor increases, IGVs and VSVs will axially open. When the speed of the HPC rotor decreases, IGVs and VSVs will axially close.