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Acta Aeronautica et Astronautica Sinica ›› 2023, Vol. 44 ›› Issue (17): 128107-128107.doi: 10.7527/S1000-6893.2022.28107

• Fluid Mechanics and Flight Mechanics • Previous Articles     Next Articles

Plume velocity characteristics of pintle controlled solid rocket motor based on TDLAS technique

Ruyao WANG1, Anchen SONG2, Limin WANG3,4, Deyou WANG1, Junwei LI1(), Ningfei WANG1   

  1. 1.School of Aerospace Engineering,Beijing Institute of Technology,Beijing  100081,China
    2.Beijing System Design Institute of Electro Mechanic Engineering,Beijing  100854,China
    3.College of Aerospace Engineering,National University of Defense Technology,Changsha  410073,China
    4.The 41st Institute of the Sixth Academy of China Aerospace Science & Industry Corp,Huhhot  010010,China
  • Received:2022-10-11 Revised:2022-11-01 Accepted:2022-11-25 Online:2023-09-15 Published:2022-11-29
  • Contact: Junwei LI E-mail:david78lee@bit.edu.cn
  • Supported by:
    National Natural Science Foundation of China(11572042)

Abstract:

To investigate the plume velocity characteristics, a numerical simulation model of plume of the pintle controlled solid rocket motor considering afterburning reaction is established, using the finite-rate reaction model and dynamic mesh. The model is combined with Tunable Diode Laser Absorption Spectroscopy (TDLAS) technology to calculate the plume velocity. The transient flow field during the pintle motion is analyzed, and the effects of after-burning reactions and measurement position on velocity measurement investigated. The results show that the transient plume field changes periodically with the reciprocal motion of the pintle. When the pintle tends to close the nozzle, a strong shock wave appears near the nozzle. The downstream plume velocity distribution is more uniform, indicating the reduced influence of the velocity gradient on TDLAS measurement; the afterburning reaction leads to significant changes in the downstream velocity and H2O component distribution of the plume. Along the downstream direction, the influence of afterburning on the oscillation amplitude of the velocity along the TDLAS optical path gradually increases. In practice, to reduce the influence of afterburning and the velocity gradient, the measuring position should be closer to the nozzle to obtain measurement closer to the axis velocity.

Key words: pintle controlled solid rocket motor, plume velocity, tunable diode laser absorption spectroscopy (TDLAS), dynamic regulation, afterburning reaction

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