News on China's scientific and technological development.
- Thread starter Quickie
- Start date
Cerafiber SiC fiber passes acceptance test from ACAE for hot section (turbine blade) CMC material. CJ-1000 and CJ-2000 still use superalloy blades, so this is either for another engine or potential future upgrade
CJ-1000A uses superalloy as engine entered in certification process and Material probably freeze too.
but CJ-2000 will use CMC coz engine is still in prototype stage and ground testing begun last year and engine is still couple of years away from Material selection.
supercat
Colonel
Huawei broke the technological bottleneck that restricts the development of high-speed fiber optical communication.
China's domestically produced CJ-1000 engine will be airworthy by the end of the year, and the C919 will soon be equipped with a "domestic engine"!
The intermittent nature of the Sino-US tech war is undeniable. Given this reality, long-term reliance on external supply is untenable, and the only hope lies in domestic breakthroughs . Within China's tech industry, areas like advanced semiconductor manufacturing and aircraft engines undoubtedly face the greatest uncertainty.Recently, the domestic aviation engine sector has seen new progress. According to an interview with Chinese Academy of Engineering Academician Zhang Yanzhong on CCTV's "Lu Jian Interview" on August 1st, the domestically produced Yangtze River-1000A engine has entered the final stages of airworthiness certification and is expected to be mass-produced after certification is completed in 2025. This means that the delivery of the domestically produced CJ-1000A engine (Yangtze River-1000A) has entered the countdown phase, marking the imminent achievement of "power independence" for the domestically produced C919 large aircraft .Furthermore, in accordance with the requirements of the Civil Aviation Administration of China (CAAC), the CJ-1000A engine will complete 317 airworthiness tests , including ground verification and flight tests , by the end of 2025. C919 installation testing will begin in 2026, with the first C919 equipped with the CJ-1000A expected to be delivered to China Eastern Airlines . The engine is expected to receive formal airworthiness certification from the CAAC in 2027, entering the mass installation phase . Full commercial operation is expected in 2028, with the goal of capturing a 15% market share for C919 engines .It is understood that the CJ1000A engine has completed 300 take-off and landing tests at plateau airports and in wet and hot conditions at sea , completed the test of single-crystal turbine blades withstanding 1800°C high-temperature gas impact , and conducted high-altitude flight tests on the Y-20 platform for verification.
The domestically produced CJ-1000A boasts a thrust of 13-18 tons, on par with the LEAP-1C . Its fuel consumption is 0.52 kg/(kgf·h),surpassing the LEAP-1C's 0.53, resulting in a 15% increase in efficiency.Furthermore,its noise and emissions control are at world-leading levels, with a design life of 20,000 hours, maintenance intervals extended to over 2,000 hours, and nitrogen oxide emissions reduced by 30% . In other words, the domestically produced CJ-1000A has surpassed the LEAP-1C in most core performance areas, and has also achieved innovations in high-temperature-resistant materials and intelligent control systems .Of course, this series of performance advances and innovations depends on the establishment of a domestic independent innovation system; more than 60 scientific research institutes and various Chinese manufacturing "hidden champions" participated in the development of the CJ-10 00A engine , such as Fushun Special Steel supplying high-temperature alloy materials, Western Superconducting providing titanium alloy materials, and Polylite fully supporting the field of 3D printing. These are all breakthroughs in key component technologies.
this is the first time, author wrote almost an accurate article regarding CJ-1000A engine on any Chinese website.
Forging quality and Materials are absolutely world class. AECC specifically emphasis on emission control and noise reduction. heavy use of composite and 3D printed components enhance the precision quality. top of the line manufacturing/assembling process.
The two links used this phrase "hot section turbine blades". 全面匹配新型航空发动机和燃气轮机热端涡轮叶片的严苛指标。As I understand from this NASA article . There are rotor blade and stator blade in the turbine section (in the same way as in compressor). I assume that this CMC blade is the stator, am I right? Not to downplay its achievement, just be sure I undertand right.
It’s a bit ambiguous, but stators are specifically 静叶片. 涡轮叶片 when used with specificity usually refers to the turbine blades themselves, but in generic use can refer to any blade in the turbine.