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Acta Aeronautica et Astronautica Sinica ›› 2023, Vol. 44 ›› Issue (21): 529170-529170.doi: 10.7527/S1000-6893.2023.29170

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Dynamic response of hydrazine⁃based monocomponent rocket engine

Yaodong JIANG1,2, Quanyong XU2(), Yulin MA1, yao CHENG3   

  1. 1.School of Mechanics and Engineering,Liaoning Technical University,Fuxin 123000,China
    2.Aircraft Engine Research Institute,Tsinghua University,Beijing 100084,China
    3.School of Innovation and Practice,Liaoning Technical University,Fuxin 123000,China
  • Received:2023-06-14 Revised:2023-07-11 Accepted:2023-09-13 Online:2023-11-15 Published:2023-09-22
  • Contact: Quanyong XU E-mail:xuquanyong@tsinghua.edu.cn
  • Supported by:
    National Science and Technology Major Project(J2019-V-0001-0092)

Abstract:

Monocomponent rocket engines are important elements for attitude adjustment and orbit control of space-craft. According to the dynamic response of hydrazine-based monocomponent rocket engine to the change form of inlet flow, a simulation model of propellant flow, decomposition and heat transfer in the thrust chamber of the engine is established, and the numerical simulation and calculation analysis of three different propellant supply modes (steady-state supply, linear supply and pulse supply) of the engine are carried out by using these models. The result is that the temperature at each point of the engine will vary in response to the inlet flow due to the difference in position. The response of pressure, velocity and thrust to changes in inlet flow rate is very rapid, and the overall trend of the three remains synchronized with the trend of inlet flow rate changes. There are spikes in velocity and thrust that are higher than the stable values during the start-up phase in both steady-state and pulse supply, in the steady-state supply, the velocity and thrust spikes are 8.6% and 4.7% higher than the stable value of the start-up phase, respectively, in the pulsed supply, the velocity and thrust spikes are 6.2% and 3.0% higher than the stable value of the start-up phase, respectively, in the first pulse phase, the velocity and thrust spikes are 6.2% and 3.0% higher than the stable value of the start-up phase, respectively, and the second pulse phase, the velocity and thrust spikes are 9.3% and 5.2% higher than the stable value of the start-up phase, respectively.

Key words: hydrazine, dynamic response, propellant supply, thrust, monocomponent rocket engine

CLC Number: