| Country of origin | China |
|---|---|
| Associated LV | Long March 9 |
| Predecessor | YF-77 |
| Status | In development |
| Liquid-fuel engine | |
| Propellant | Liquid oxygen / Liquid hydrogen |
| Mixture ratio | 6.0 (±5%) Variable |
| Cycle | Staged combustion cycle |
| Pumps | 2 |
| Configuration | |
| Nozzle ratio | 100 |
| Performance | |
| Thrust, vacuum | 2,200 kilonewtons (490,000 lbf) |
| Thrust-to-weight ratio | 46.7 |
| Specific impulse, vacuum | 453 seconds (4.44 km/s) |
| Dimensions | |
| Length | 6.1 metres (20 ft) (With Engine Mount) |
| Diameter | 2.87 metres (9 ft 5 in) |
| Dry mass | 4,800 kilograms (10,600 lb) |
| References | |
| References | |
The YF-90 is a liquid cryogenic rocket engine burning liquid hydrogen and liquid oxygen in a staged combustion cycle. It is China's first hydrogen-oxygen engine to use the staged combustion cycle and is expected to be used for the second stage of the Long March 9, which is a three-stage rocket with boosters. The engine has advanced features such as variable thrust, multiple ignitions, and automatic fault diagnosis.
History
On July 28, 2021, the engine's manufacturer, China Aerospace Science and Technology Corporation (CASC) completed the first YF-90 engineering prototype.
On September 23, 2021, the engine successfully underwent its first semi-system test. The YF -90 engine is one of the key technologies for China's deep space exploration ambitions.
In 2023, CASC plans to conduct more tests on the YF-90 engine, as well as on its first-stage counterpart, the YF-130 engine. The YF-130 is a liquid kerosene-oxygen rocket engine with a thrust of 500 tonnes. Both engines are expected to be ready for flight by 2025.
On December 17, 2024, the engine successfully underwent its first full system test.
References
- Brügge, Norbert. "China's new rocket engines". www.b14643.de. Retrieved 8 March 2023.
- ^ 丁兆波,刘 倩,王天泰,杨继东,孙纪国,龚杰峰 (2020-11-17). "220t级补燃循环氢氧发动机推力室研制" (in Simplified Chinese). 北京航天动力研究所,北京 100076. Retrieved 2022-04-01.
{{cite web}}: CS1 maint: multiple names: authors list (link) - 孙纪国,郑孟伟,龚杰峰,陶瑞峰 (2022-01-15). "220tf补燃循环氢氧发动机研制进展" (in Simplified Chinese). 《火箭推进》2022年02期. Archived from the original on 2022-06-05. Retrieved 2022-06-05.
{{cite web}}: CS1 maint: multiple names: authors list (link) - "China successfully tests new engine for Long March 9 rocket". 2022-10-03. Retrieved 2023-03-08.
- "Development Trend of Liquid Hydrogen-Fueled Rocket Engines (Part 1): Current Status and Future Prospects in Korea and China". Journal of Mechanical Science and Technology. 36 (2): 1015–1026. doi:10.1007/s42405-022-00519-7. S2CID 251938449.
- 蘇子牧 (2021-07-29). "中國製造｜重型火箭220噸級引擎現身 首台工程樣機完成生產" (in Traditional Chinese). 香港01. Archived from the original on 2021-08-06. Retrieved 2021-08-07.
- "China moves to next stage of super heavy rocket development". 2022-09-07. Retrieved 2023-03-08.
- 郑孟伟 (2021-09-27). "重型运载火箭220吨级补燃循环氢氧发动机首次半系统试验圆满成功" (in Simplified Chinese). 北京航天动力研究所. Archived from the original on 2021-09-27. Retrieved 2021-09-27.
- ^ "China Achieves 'Critical Milestone' In Next-Gen Rocket Engine Tech". 2021-12-25. Retrieved 2023-03-08.
- 赵卫华. "首次整机试验圆满成功！我国大推力氢氧火箭发动机研制和试验能力建设取得突破性进展" (in Simplified Chinese). Retrieved 2024-12-19.
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