The AECC CJ-1000A ( Chang Jiang-1000A/长江-1000A) is a Chinese

high-bypass turbofan The turbofan or fanjet is a type of airbreathing jet engine that is widely used in aircraft propulsion. The word "turbofan" is a portmanteau of "turbine" and "fan": the ''turbo'' portion refers to a gas turbine engine which achieves mechanica ...

jet engine currently in development.

Design

The CJ-1000A is developed for the Comac C919

narrow-body airliner A narrow-body aircraft or single-aisle aircraft is an airliner arranged along a single aisle, permitting up to 6-abreast seating in a cabin less than in width. In contrast, a wide-body aircraft is a larger airliner usually configured with mult ...

with a thrust of . It has a diameter of and a length of , to be compared with the

CFM LEAP The CFM International LEAP ("Leading Edge Aviation Propulsion") is a high-bypass turbofan engine produced by CFM International, a 50–50 joint venture between American GE Aviation and French Safran Aircraft Engines (formerly Snecma). It is th ...

-1C diameter and length. It uses a similar two-spool configuration, with a one-stage fan, three-stage booster, 10-stage high-pressure compressor, two-stage high-pressure turbine and six-stage low pressure turbine, compared to the Leap-1C seven stages. Its 18 wide-chord fan blades are made of hollow

titanium Titanium is a chemical element with the Symbol (chemistry), symbol Ti and atomic number 22. Found in nature only as an oxide, it can be reduced to produce a lustrous transition metal with a silver color, low density, and high strength, resista ...

like those of Rolls-Royce Plc., and its single

annular combustor A combustor is a component or area of a gas turbine, ramjet, or scramjet engine where combustion takes place. It is also known as a burner, combustion chamber or flame holder. In a gas turbine engine, the ''combustor'' or combustion chamber is fe ...

uses

3D printed 3D printing or additive manufacturing is the construction of a three-dimensional object from a CAD model or a digital 3D model. It can be done in a variety of processes in which material is deposited, joined or solidified under computer co ...

fuel nozzles.

Development

A model of the CJ-1000Al was exhibited at the AVIC booth of the September 2011 Beijing Air Show, and was expected to be completed in 2016. At the time, entry into service was targeted for 2020 and a possible cooperation with

MTU Aero Engines MTU Aero Engines AG is a German aircraft engine manufacturer. MTU develops, manufactures and provides service support for military and civil aircraft engines. MTU Aero Engines was formerly known as MTU München. History While the Munich-based en ...

was studied. In 2013, Avic Engine subsidiary Shenyang Engine Design and Research Institute proposed its WS-20 (SF-A) (designed for the

Y-20 The Xi'an Y-20 Kunpeng () is a large military transport aircraft developed by the Xi'an Aircraft Industrial Corporation for the People's Republic of China (PRC). The aircraft is nicknamed "Chubby Girl" () in the Chinese aviation industry becau ...

military airlifter), which was still being developed, to power the C919 instead of the CJ-1000A (SF-B) which used older technology closer to the CFM56 than to the Leap. The suggestion was rejected later by Comac. Assembly of the first CJ-1000AX engine was completed in December 2017 after an 18-month process. 24 more engines will support an airworthiness certification program and it should enter service after 2021. In May 2018, the first engine ran in a

Shanghai Shanghai (; , , Standard Mandarin pronunciation: ) is one of the four direct-administered municipalities of the People's Republic of China (PRC). The city is located on the southern estuary of the Yangtze River, with the Huangpu River flowin ...

test cell reaching a core speed of 6,600 rpm. By May 2018, AECC intended to certify its CJ-1000 in 2027 and introduce it in 2030, eight years behind the original schedule. The CJ-1000A would need thrust to replace the

. The CJ-1000B would power an extended-range C919 variant.

Other derivatives

CJ-2000 (AEF3500)

The CJ-1000 spool and combustor core, with 10 compressor stages and two turbine stages, will be scaled up for the CJ-2000 for a 2023 demonstration. It will need a new low-pressure spool with a four-stage compressor booster up from three, and seven LP turbine stages up from six, the GEnx-1B stage count while the UEC PD-35 has nine HP compressor stages. With

composite Composite or compositing may refer to: Materials * Composite material, a material that is made from several different substances ** Metal matrix composite, composed of metal and other parts ** Cermet, a composite of ceramic and metallic materials ...

fan blades and fan case, it would power the CRAIC CR929 after 2030 with an over 10

bypass ratio The bypass ratio (BPR) of a turbofan engine is the ratio between the mass flow rate of the bypass stream to the mass flow rate entering the core. A 10:1 bypass ratio, for example, means that 10 kg of air passes through the bypass duct for ev ...

and a 50.3 OPR in climb, and targets a TSFC of is aimed for by CRAIC.

CJ-500

The CJ-500 would offer for the ARJ21.

Applications

* Comac C919 : as alternative to CFM LEAP

Specifications

References

{{AVIC Aero Products High-bypass turbofan engines 2010s turbofan engines