Open-loop control of periodic thermoacoustic oscillations: Experiments and low-order modelling in a synchronization framework

Guan, Yu1; Gupta, Vikrant2; Kashinath, Karthik3; Li, Larry K. B.1

2019

10.1016/j.proci.2018.07.077

PROCEEDINGS OF THE COMBUSTION INSTITUTE   影响因子和分区

1540-7489

1873-2704

Open-loop forcing is known to be an effective strategy for controlling self-excited thermoacoustic oscillations, but the details of this synchronization process have yet to be comprehensively explored. In this study, we experimentally examine the synchronization dynamics of a laminar conical premixed flame in a tube combustor subjected to periodic acoustic forcing. We compare the response of this forced self-excited system with that of a forced Duffing-van der Pol oscillator, and find many similarities but also some differences. The similarities include (i) a torus-birth bifurcation from periodicity to quasiperiodicity at low forcing amplitudes, producing a stable ergodic T-2 torus attractor in phase space; (ii) a transition from T-2 quasiperiodicity to lock-in above a critical forcing amplitude, which increases linearly as the forcing frequency f(f) deviates from the natural frequency f(1); (iii) two distinct routes to lock-in, one via a torus-death bifurcation if f(f) is far from f(1) and one via a saddle-node bifurcation if f(f) is close to f(1); and (iv) asynchronous quenching (AQ), which coincides with a torus-death bifurcation to lock-in and reduces the oscillation amplitude - by up to 90% in the combustor. There are, however, quantitative differences between the two systems, which pertain mainly to (i) the magnitude of the amplitude reduction achieved by AQ and (ii) the size of the AQ region in the f(f) /f(1) -forcing-amplitude plane.

Thermoacoustics Combustion instability Synchronization Low-order modelling Flow control

SCI ; EI

英语

其他

Research Grants Council of Hong Kong[16235716] ; Research Grants Council of Hong Kong[26202815]

Thermodynamics ; Energy & Fuels ; Engineering

Thermodynamics ; Energy & Fuels ; Engineering, Chemical ; Engineering, Mechanical

WOS:000457095600112

ELSEVIER SCIENCE INC

20183205656641

Bifurcation (mathematics) ; Circuit oscillations ; Combustors ; Control theory ; Flow control ; Locks (fasteners) ; Oscillators (mechanical) ; Phase space methods ; Plasma oscillations ; Thermoacoustics

Combustors:521.2 ; Mechanical Devices:601.1 ; Electric Networks:703.1 ; Control Systems:731.1 ; Specific Variables Control:731.3 ; Acoustics, Noise. Sound:751 ; Mathematics:921 ; Plasma Physics:932.3 ; Systems Science:961

ENGINEERING

Web of Science

1.Hong Kong Univ Sci & Technol, Dept Mech & Aerosp Engn, Clear Water Bay, Hong Kong, Peoples R China
2.Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, Shenzhen, Peoples R China
3.Lawrence Berkeley Natl Lab, Climate Sci Dept, 1 Cyclotron Rd, Berkeley, CA 94720 USA

Guan, Yu,Gupta, Vikrant,Kashinath, Karthik,et al. Open-loop control of periodic thermoacoustic oscillations: Experiments and low-order modelling in a synchronization framework[J]. PROCEEDINGS OF THE COMBUSTION INSTITUTE,2019,37(4):5315-5323.

Guan, Yu,Gupta, Vikrant,Kashinath, Karthik,&Li, Larry K. B..(2019).Open-loop control of periodic thermoacoustic oscillations: Experiments and low-order modelling in a synchronization framework.PROCEEDINGS OF THE COMBUSTION INSTITUTE,37(4),5315-5323.

Guan, Yu,et al."Open-loop control of periodic thermoacoustic oscillations: Experiments and low-order modelling in a synchronization framework".PROCEEDINGS OF THE COMBUSTION INSTITUTE 37.4(2019):5315-5323.