TY - GEN
T1 - Analysis of Pressure Oscillation Characteristics in an Engine with a Submerged Nozzle Based on Clx Motor
AU - Huo, Chao
AU - Xu, Hongbo
AU - Liu, Peijin
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - As a major component of a solid rocket motor, the nozzle has an important influence on the pressure oscillation in the combustion chamber. This paper takes Clx motor with a typical backward-facing step configuration as the reference, meanwhile a submerged nozzle structure is introduced for the comparison. The large eddy simulation methodology is built to investigate vortex motion laws and pressure oscillation characteristics in the combustion chambers of Clx motor and the engine taking Clx as reference but with a submerged nozzle, respectively. The numerical computation results show that: The maximum error on the frequency of pressure oscillations in the combustion chamber of Clx motor between the computations and experiments is 4.47%, which indicates that the large eddy simulation methodology established in this paper is highly accurate and reliable; the vortex shedding frequency in both engines is close to the main frequency of pressure oscillations in the combustion chamber, which means the acoustic-vortex coupling occurs; the vortex in the cavity of the submerged nozzle interacts with the upstream vortex at the nozzle inlet. This makes both the main frequency and corresponding amplitude of the pressure oscillations at the inlet of the submerged nozzle lower than those of Clx motor with a conventional nozzle.
AB - As a major component of a solid rocket motor, the nozzle has an important influence on the pressure oscillation in the combustion chamber. This paper takes Clx motor with a typical backward-facing step configuration as the reference, meanwhile a submerged nozzle structure is introduced for the comparison. The large eddy simulation methodology is built to investigate vortex motion laws and pressure oscillation characteristics in the combustion chambers of Clx motor and the engine taking Clx as reference but with a submerged nozzle, respectively. The numerical computation results show that: The maximum error on the frequency of pressure oscillations in the combustion chamber of Clx motor between the computations and experiments is 4.47%, which indicates that the large eddy simulation methodology established in this paper is highly accurate and reliable; the vortex shedding frequency in both engines is close to the main frequency of pressure oscillations in the combustion chamber, which means the acoustic-vortex coupling occurs; the vortex in the cavity of the submerged nozzle interacts with the upstream vortex at the nozzle inlet. This makes both the main frequency and corresponding amplitude of the pressure oscillations at the inlet of the submerged nozzle lower than those of Clx motor with a conventional nozzle.
KW - acoustic-vortex coupling
KW - large eddy simulation
KW - pressure oscillation
KW - solid rocket motor
KW - submerged nozzle
UR - http://www.scopus.com/inward/record.url?scp=85186745802&partnerID=8YFLogxK
U2 - 10.1109/ICMAE59650.2023.10424632
DO - 10.1109/ICMAE59650.2023.10424632
M3 - 会议稿件
AN - SCOPUS:85186745802
T3 - 2023 14th International Conference on Mechanical and Aerospace Engineering, ICMAE 2023
SP - 185
EP - 190
BT - 2023 14th International Conference on Mechanical and Aerospace Engineering, ICMAE 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 14th International Conference on Mechanical and Aerospace Engineering, ICMAE 2023
Y2 - 18 July 2023 through 21 July 2023
ER -