The YF-79 is a liquid cryogenic rocket engine burning liquid hydrogen and liquid oxygen in a closed expander cycle. It is China's fourth generation of upper stage cryogenic propellant engine, after the YF-73, YF-75 and the YF-75D. It can do multiple restarts thanks to an electric spark igniter and a prototype was tested at 60% and 100% (25 tonnes-force (250 kN; 25 LTf; 28 STf)) thrust levels in December 2021.[1]
| Country of origin | China |
|---|---|
| Designer | Beijing Aerospace Propulsion Institute |
| Associated LV | Long March 9 |
| Predecessor | YF-75D |
| Status | In development |
| Liquid-fuel engine | |
| Propellant | Liquid oxygen / Liquid hydrogen |
| Mixture ratio | 6.0 |
| Cycle | Closed Expander Cycle |
| Configuration | |
| Chamber | 1 |
| Nozzle ratio | 160 |
| Performance | |
| Thrust, vacuum | 250 kilonewtons (56,000 lbf) |
| Chamber pressure | 7.0 MPa (1,020 psi) |
| Specific impulse, vacuum | 455.2 seconds (4.464 km/s) |
| Used in | |
| Long March 9 | |
| References | |
| References | [1][2][3][4] |
It will be used on the third stage of the Long March 9.
References
edit- ^ a b Xin, Zhang. "我国重型运载火箭25吨级膨胀循环氢氧发动机首台推力室挤压试验取得圆满成功" [First thrust chamber test firing of China's heavy launch vehicle 25-tonne hydrogen-oxygen expansion cycle engine a complete success] (in Chinese). Archived from the original on 2021-12-22. Retrieved 2021-12-22.
- ^ Brügge, Norbert (2021-12-22). "An overlook to China's new generation of Rocket Engines". B14643.de. Archived from the original on 2021-12-22. Retrieved 2021-12-22.
- ^ 崔荣军,何伟锋. "25吨级膨胀循环发动机技术方案研究". 导弹与航天运载技术2015年06期. Retrieved 2021-12-23.
- ^ 褚宝鑫,赵海龙,陈旭扬,龚杰峰 (2022-01-05). "25tf膨胀循环氢氧发动机研制进展" (in Simplified Chinese). 《火箭推进》2022年02期. Retrieved 2022-06-05.
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External links
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