导航

Acta Aeronautica et Astronautica Sinica ›› 2023, Vol. 44 ›› Issue (17): 128182-128182.doi: 10.7527/S1000-6893.2022.28182

• Fluid Mechanics and Flight Mechanics • Previous Articles    

Prescribed performance control of thermoacoustic instability in aero-engine combustion chambers

Xiao MENG1, Dan MA1(), Hongjun LIN2, Chao CHEN2   

  1. 1.College of Information Science and Engineering,Northeastern University,Shenyang 110819,China
    2.AECC Shenyang Engine Research Institute,Shenyang 110015,China
  • Received:2022-10-28 Revised:2022-11-28 Accepted:2022-12-27 Online:2023-01-13 Published:2023-01-12
  • Contact: Dan MA E-mail:madan@mail.neu.edu.cn
  • Supported by:
    National Natural Science Foundation of China(61973060)

Abstract:

To reduce NO x emissions in aero-engine combustion chambers, lean premixed pre-vaporized combustion technology is widely used, leading to more frequent combustion instability. The energy of aero-engine combustion instability comes from the combustion of the propellant, with thermoacoustic instability being the main form of combustion instability. To suppress the thermoacoustic instability, the influence of flame combustion response on the system is firstly considered based on the Culick model, and the mathematical model of thermoacoustic instability with state delay is derived. Based on the derived model, the influence of the convection time from fuel injection to heat release from combustion on the stability of the thermoacoustic system is then explored, a back-stepping active control method with prescribed performance designed, and the upper bound of the convection time obtained under the premise of ensuring the prescribed performance of the system. Both theoretical analysis and simulation results verify that the active control method can make the pressure oscillation of the thermoacoustic instability system converge asymptotically and satisfy the prescribed performance with time-delay robustness.

Key words: thermoacoustic instability, state delay, prescribed performance control, backstepping, robust control

CLC Number: