DOC AIRBUS | AMM A320FCOMBUSTOR DIFFUSER NOZZLE ASSEMBLY - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
1. General
Located between the High Pressure Compressor (HPC) assembly and the High Pressure Turbine (HPT) assembly, the combustor diffuser nozzle includes:
** ON A/C NOT FOR ALL Located between the High Pressure Compressor (HPC) assembly and the High Pressure Turbine (HPT) assembly, the combustor diffuser nozzle includes:
- The combustor diffuser nozzle case
- The Outlet Guide Vanes (OGVs)
- The diffuser
- The Compressor Discharge Pressure (CDP) stator seal.
Combustor Diffuser Nozzle Assembly2. System Description
A. Combustor Diffuser Nozzle Case
The combustor diffuser nozzle case is a life limited part that supports the inner and outer liners of the combustion chamber assembly and gives structural load path between the rear HPC stator case (Ref. AMM D/O 72-30-00-00) and the HPT stator case (Ref. AMM D/O 72-50-00-00).
The combustor diffuser nozzle case is a life limited part that supports the inner and outer liners of the combustion chamber assembly and gives structural load path between the rear HPC stator case (Ref. AMM D/O 72-30-00-00) and the HPT stator case (Ref. AMM D/O 72-50-00-00).
B. OGVs
OGVs direct the air axially from the HPC Stage 10 to the combustion chamber with the correct airflow angle for an efficient use in the combustion process.
OGVs direct the air axially from the HPC Stage 10 to the combustion chamber with the correct airflow angle for an efficient use in the combustion process.
C. Diffuser
The diffuser reduces the velocity of the air to increase the static pressure and help keep an efficient combustion process. It also gives structural support for the OGV and static abradable CDP stator seal, as well as the HPT stage 1 nozzle.
The diffuser reduces the velocity of the air to increase the static pressure and help keep an efficient combustion process. It also gives structural support for the OGV and static abradable CDP stator seal, as well as the HPT stage 1 nozzle.
D. CDP Stator Seal
The CDP stator seal, together with the CDP rotating air seal (Ref. AMM D/O 72-30-00-00), makes sure that the HPC stage 10 pressurized air flows through the diffuser. It is attached to the diffuser with 48 nut-and-bolt attachment points.
The CDP stator seal, together with the CDP rotating air seal (Ref. AMM D/O 72-30-00-00), makes sure that the HPC stage 10 pressurized air flows through the diffuser. It is attached to the diffuser with 48 nut-and-bolt attachment points.
3. Operation
High-velocity air from the HPC flows through the OGV and then into the diffuser where the air velocity decreases and the air pressure increases. The air is controlled and divided for a correct air/fuel mixture for the combustion process.
High-velocity air from the HPC flows through the OGV and then into the diffuser where the air velocity decreases and the air pressure increases. The air is controlled and divided for a correct air/fuel mixture for the combustion process.