ACAE CJ-1000A
Chinese high-bypass turbofan jet engine
The ACAE/AECC CJ-1000A (Chinese: 长江-1000A; pinyin: Cháng Jiāng; lit. 'Yangtze-1000A') is a Chinese high-bypass turbofan engine currently under development by the Aero Engine Corporation of China (AECC), through its Commercial Aircraft Engines (ACAE) division in Shanghai.
Design
The CJ-1000A is being developed as the domestic powerplant for the Comac C919, a narrow-body aircraft, offering a thrust range of 10,000–20,000 kgf (98–196 kN; 22,000–44,000 lbf).
The engine measures 1.95 metres (6 ft 5 in) in diameter and 3.29 metres (10.8 ft) in length, comparable to the 1.98-metre (6 ft 6 in) diameter and 3.32-metre (10.9 ft) length of the CFM LEAP-1C, the current engine for the C919. It features a two-spool design, similar to the LEAP-1C, with a single-stage fan, three-stage booster, ten-stage high-pressure compressor, two-stage high-pressure turbine, and six-stage low-pressure turbine (compared to seven stages on the LEAP-1C). The CJ-1000A is equipped with eighteen hollow titanium wide-chord fan blades and a single annular combustor uses 3D printed fuel nozzles.
Development
A model of the CJ-1000A was first displayed at the Aviation Industry Corporation of China (AVIC) booth during the 2011 Beijing Air Show, with initial completion targeted for 2016. At the time, service entry was projected for 2020, and a possible collaboration with MTU Aero Engines was under consideration.
In 2013, AVIC subsidiary Shenyang Aeroengine Research Institute proposed using the 28,700 lbf (128 kN) WS-20, originally developed for the Xi'an Y-20 military airlifter, as a domestically-produced powerplant for the C919. Although the WS-20 incorporated newer technology and entered service in 2023, the proposal was ultimately rejected by Comac in favor of the CJ-1000A, which relies on technology closer to the CFM International CFM56 than the LEAP family.
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