Modeling and analysis of premixed flame dynamics by means of distributed time delays

W Polifke - Progress in Energy and Combustion Science, 2020 - Elsevier
The unsteady response of a flame to acoustic or flow perturbations plays a crucial role in
thermoacoustic combustion instability. The majority of studies on this subject presents and …

Study on the dynamic process of premixed hydrogen-air deflagration flame propagating in a closed space with obstacles

Z Sheng, G Yang, W Gao, S Li, Q Shen, H Sun - Fuel, 2023 - Elsevier
This paper investigates the kinetic behavior of premixed hydrogen-air deflagration flame
propagation in a closed tube with different obstacle arrangements with the Large Eddy …

Study on the dynamic process of in-duct hydrogen-air explosion flame propagation under different blocking rates

Y Qin, X Chen - International Journal of Hydrogen Energy, 2022 - Elsevier
To effectively analyses the flame propagation of premixed hydrogen-air explosion, this
paper carries out a numerical study on the dynamics of flame propagation during hydrogen …

Quantification and propagation of uncertainties in identification of flame impulse response for thermoacoustic stability analysis

S Guo, CF Silva, A Ghani… - … of Engineering for …, 2019 - asmedigitalcollection.asme.org
The thermoacoustic behavior of a combustion system can be determined numerically via
acoustic tools such as Helmholtz solvers or network models coupled with a model for the …

A categorization of marginally stable thermoacoustic modes based on phasor diagrams

KJ Yong, CF Silva, W Polifke - Combustion and Flame, 2021 - Elsevier
Phasor diagrams are utilized to plot and analyze thermoacoustic modes in a duct with ideal
closed/open acoustic boundary conditions that contains a velocity-sensitive flame …

Uncertainty quantification of combustion noise by generalized polynomial chaos and state-space models

CF Silva, P Pettersson, G Iaccarino, M Ihme - Combustion and Flame, 2020 - Elsevier
Many physical systems are subject to uncertainty in operating regimes, boundary conditions,
and physical parameter values. The generalized polynomial chaos (gPC) framework offers …

A Gaussian-process-based framework for high-dimensional uncertainty quantification analysis in thermoacoustic instability predictions

S Guo, CF Silva, KJ Yong, W Polifke - Proceedings of the Combustion …, 2021 - Elsevier
When combining a flame model with acoustic tools to predict thermoacoustic instability,
uncertainties embedded in the flame model and acoustic system parameters propagate …

Study on the power generation performance of multi-mode piezoelectric–electromagnetic composite energy harvester based on rail vibration absorber

W Qian, X Ou, S Yong, Y Zheng - Proceedings of the …, 2024 - journals.sagepub.com
With the rapid development in rail transit industry in China, the energy supply of rail
monitoring equipment has become a prominent problem, especially in some remote areas …

Preserving transfer-behavior in Model Order Reduction for thermoacoustic stability analysis

N Purwar, W Polifke - Journal of Sound and Vibration, 2023 - Elsevier
Thermoacoustic systems are often modeled with a hybrid approach that combines separate
models for acoustic propagation and flame dynamics. Model Order Reduction (MOR) may …

Robust analysis of linear systems with uncertain delays using PIEs

S Wu, MM Peet, F Sun, C Hua - IFAC-PapersOnLine, 2021 - Elsevier
This paper establishes a PIE (Partial Integral Equation)-based technique for the robust
stability and H∞ performance analysis of linear systems with interval delays. The delays …