The Pearl 15 has a completely new engine core, with a 10-stage high-pressure compressor, and a two-stage high-pressure turbine
with enhanced aerodynamics and blade cooling.
Federal Aviation Administration (FAA) has issued an airworthiness directive (AD) for certain General Electric GEnex-1B and GEnex-2B engines, requiring the removal of high-pressure turbine
(HPT) stator cases due to a "quality escape" at one of the manufacturer's vendors, the FAA said.
blades inside the engine rotate at 12,500 rpm, with their tips reaching 1,200 mph-twice the speed of sound.
Safran Aircraft Engines is a developer and producer of the high-pressure compressor, the combustion chamber, the high-pressure turbine
, the gearbox, the FADEC system.
Minimization of blade tip clearance in the high-pressure turbine
(HPT) and high-pressure compressor (HPC) has been a subject of intense research since the inception of gas turbine engine.
In layout A, the high-pressure turbine
was equipped with a wastegate actuator only.
Turbine blades and vanes make up the turbine section of the modern aircraft gas turbine engine and are present in the high-pressure turbine
(HPT) and low-pressure turbine (LPT) sections.
It uses an actual gas turbine and consists of an axial compressor with 15 floors, six arranged combustion chambers to (90[degrees]) to the axial intake, a high-pressure turbine
single floor (first floor), which drives the compressor and auxiliary equipment, as well as a low-pressure turbine (second floor), which drives the load.
Here, not only are turbine blade tip aerodynamic losses a concern, but also blade tip durability, especially in the high-pressure turbine
(HPT), which is subject to high gas temperatures.
The part in question is a nozzle used to direct hot gases into the hottest part of the engine, the high-pressure turbine
. Its modification will not affect the targeted fuel savings which have spurred record sales of the A320NEO, nor the delivery schedule of the engine, which is due to begin shipping to Airbus in the third quarter of next year, Saia said.
Out of 157 fuel assemblies, 65 will be replaced and various safety inspections will be conducted, including inspections of the unit's high-pressure turbine
, main electrical generator and containment liner.