Development Status of the Cryogenic Oxygen/Hydrogen YF-77 Engine for Long-March 5
- Paper number
IAC-13,C4,1,2,x17679
- Author
Mr. Weibin Wang, China
- Coauthor
Mr. Dayong Zheng, Beijing Aerospace Propulsion Institute, China
- Coauthor
Ms. Guiyu Qiao, China
- Year
2013
- Abstract
The YF-77 engine, designed by the Academy of Aerospace Propulsion Technology (AALPT), China, is a high performance and reliability LH2/LO2 booster designed for the next-flagship Chinese launch vehicle, called Long-March 5. Two YF-77 engines fly on the core stage of the Long-March 5 launch vehicle. The engine utilizes a gas generator cycle, and each engine provided 700-kN at an oxidizer-to-fuel mixture ration (O/F) of 5.5. Issues resolved by design modifications and stricter quality control during development include bearing and seal wear as well as fuel trubopump rotor crack, chamber damage due to combustion instability, exi;osive fuel leaks, and etc. The reliability and safety of YF-77 is well demonstrated before its maiden journey. This discussion will cover engine system design and operating characteristics as well as component design and operating characteristics of the YF-77. The scope of testing perfoemed to qualify this engine for flight is also included.
- Abstract document
- Manuscript document
IAC-13,C4,1,2,x17679.pdf (🔒 authorized access only).
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