YF-90

YF-90
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 weight	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.^[4]^[5] The engine has advanced features such as variable thrust, multiple ignitions, and automatic fault diagnosis.^[2]

History

On July 28, 2021, the engine's manufacturer, China Aerospace Science and Technology Corporation (CASC) completed the first YF-90 engineering prototype.^[6]

On September 23, 2021, the engine successfully underwent its first semi-system test.^[7]^[8] The YF -90 engine is one of the key technologies for China's deep space exploration ambitions.^[9]

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.^[9]

References

^ Brügge, Norbert. "China's new rocket engines". www.b14643.de. Retrieved 8 March 2023.
^ ^a ^b 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.
^ ^a ^b "China Achieves 'Critical Milestone' In Next-Gen Rocket Engine Tech". 2021-12-25. Retrieved 2023-03-08.

Zdroj:https://en.wikipedia.org?pojem=YF-90
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[1] Brügge, Norbert. "China's new rocket engines". www.b14643.de. Retrieved 8 March 2023.

[engine-2] 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)

[3] 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)

[scmp1-4] "China successfully tests new engine for Long March 9 rocket". 2022-10-03. Retrieved 2023-03-08.

[springer-5] "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.

[6] 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.

[sn-7] "China moves to next stage of super heavy rocket development". 2022-09-07. Retrieved 2023-03-08.

[8] 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.

[et1-9] "China Achieves 'Critical Milestone' In Next-Gen Rocket Engine Tech". 2021-12-25. Retrieved 2023-03-08.

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