Mechanical problems of the large thrust liquid rocket engine

LI Bin; YAN Song; YANG Baofeng

doi:10.6052/1000-0992-21-003

Volume 51 Issue 4

Nov. 2021

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Li B, Yan S, Yang B F. Mechanical problems of the large thrust liquid rocket engine. Advances in Mechanics, 2021, 51(4): 831-864 doi: 10.6052/1000-0992-21-003

Citation:

Li B, Yan S, Yang B F. Mechanical problems of the large thrust liquid rocket engine. Advances in Mechanics, 2021, 51(4): 831-864 doi: 10.6052/1000-0992-21-003

Li B, Yan S, Yang B F. Mechanical problems of the large thrust liquid rocket engine. Advances in Mechanics, 2021, 51(4): 831-864 doi: 10.6052/1000-0992-21-003

Citation:

Li B, Yan S, Yang B F. Mechanical problems of the large thrust liquid rocket engine. Advances in Mechanics, 2021, 51(4): 831-864 doi: 10.6052/1000-0992-21-003

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Mechanical problems of the large thrust liquid rocket engine

doi: 10.6052/1000-0992-21-003

LI Bin^{1
,
,},
YAN Song^{2, 3},
YANG Baofeng³

1.
Academy of Aerospace Propulsion Technology, Shaanxi Xi’an 710100, China
2.
Science and Technology on Liquid Rocket Engine Laboratory, Shaanxi Xi’an 710100, China
3.
Xi'an Aerospace Propulsion Institute, Shaanxi Xi’an 710100, China

More Information

Corresponding author: CASClibin@sohu.com
Received Date: 2021-01-22
Accepted Date: 2021-04-28

Available Online: 2021-04-28

Publish Date: 2021-11-26

Abstract

Abstract

According to the extreme mechanical and thermal environment of high-thrust rocket engines, the mechanical characteristics of high thrust liquid rocket engines, such as strong vibration, large static load, multi-source excitation, and complex load transfer path, are analyzed. In statics, the whole engine structural load analysis and the components static analysis method are introduced. In dynamics, the low-frequency structural dynamic model of the entire engine, the refined model updating technique and multi-source load equivalent method are introduced. For the typical engine components, the mechanical challenges faced in the development of high thrust engine are summarized, including high-temperature and high-pressure gas swing device, rotor dynamics, dynamic and static interference fluid excitation, cavitation oscillation in inducer, large range axial force balance, supersonic turbine aeroelastic, thrust chamber thermal fatigue, nozzle lateral force load, assembly pipeline fatigue fracture, etc. The mechanical requirements and future research directions are pointed out. Finally, the status of probabilistic failure analysis of the engine is briefly introduced, which provides mechanical support for the development of high-thrust liquid rocket engines.
- High thrust liquid rocket engine,
- turbine aeroelastic,
- nozzle lateral force,
- pipe fracture,
- probabilistic failure analysis

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References(117)

References

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