System identification and early warning detection of thermoacoustic oscillations in a turbulent combustor using its noise-induced dynamics*

Lee，Minwoo1,2; Kim，Kyu Tae2; Gupta，Vikrant3; Li，Larry K.B.1

2020

10.1016/j.proci.2020.06.057

PROCEEDINGS OF THE COMBUSTION INSTITUTE   影响因子和分区

1540-7489

1873-2704

Despite significant research, self-excited thermoacoustic oscillations continue to hinder the development of lean-premixed gas turbines, making the early detection of such oscillations a key priority. We perform outputonly system identification of a turbulent lean-premixed combustor near a Hopf bifurcation using the noiseinduced dynamics generated by inherent turbulence in the fixed-point regime, prior to the Hopf point itself. We model the pressure fluctuations in the combustor with a van der Pol-type equation and its corresponding Stuart-Landau equation. We extract the drift and diffusion terms of the equivalent Fokker-Planck equation via the transitional probability density function of the pressure amplitude. We then optimize the extracted terms with the adjoint Fokker-Planck equation. Through comparisons with experimental data, we show that this approach can enable prediction of (i) the location of the Hopf point and (ii) the limit-cycle amplitude after the Hopf point. This study shows that output-only system identification can be performed on a turbulent combustor using only pre-bifurcation data, opening up new pathways to the development of early warning indicators of thermoacoustic instability in practical combustion systems.

Combustion instability Low-order modeling Nonlinear dynamics System identification Thermoacoustics

SCI ; EI

英语

其他

Research Grants Council of Hong Kong[16235716,26202815,16210418] ; National Natural Science Foundation of China[11672123,91752201] ; Department of Science and Technology of Guangdong Province[2019B21203001] ; Shenzhen Science and Technology Innovation Committee["JCYJ20170412151759222","KQTD20180411143441009"] ; National Research Foundation of Korea (NRF) - Korean government (MSIT)[2019R1A2C1003208]

Thermodynamics ; Energy & Fuels ; Engineering

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

WOS:000640387700021

ELSEVIER SCIENCE INC

20203409079355

Combustors ; Religious buildings ; Combustion ; Plasma oscillations ; Identification (control systems) ; Oscillators (mechanical) ; Probability density function ; Dynamics ; Fokker Planck equation ; Hopf bifurcation

Public Buildings:402.2 ; Combustors:521.2 ; Mechanical Devices:601.1 ; Thermodynamics:641.1 ; Control Systems:731.1 ; Acoustics, Noise. Sound:751 ; Mathematics:921 ; Probability Theory:922.1 ; Classical Physics; Quantum Theory; Relativity:931 ; Plasma Physics:932.3

ENGINEERING

2-s2.0-85089475246

Scopus

1.Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
2.Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
3.Guangdong Provincial Key Laboratory of Turbulence Research and Applications, Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen, China

Lee，Minwoo,Kim，Kyu Tae,Gupta，Vikrant,et al. System identification and early warning detection of thermoacoustic oscillations in a turbulent combustor using its noise-induced dynamics*[J]. PROCEEDINGS OF THE COMBUSTION INSTITUTE,2020,38(4):6025-6033.

Lee，Minwoo,Kim，Kyu Tae,Gupta，Vikrant,&Li，Larry K.B..(2020).System identification and early warning detection of thermoacoustic oscillations in a turbulent combustor using its noise-induced dynamics*.PROCEEDINGS OF THE COMBUSTION INSTITUTE,38(4),6025-6033.

Lee，Minwoo,et al."System identification and early warning detection of thermoacoustic oscillations in a turbulent combustor using its noise-induced dynamics*".PROCEEDINGS OF THE COMBUSTION INSTITUTE 38.4(2020):6025-6033.