Characterization of nonlinear responses of non-premixed flames to low-frequency acoustic excitations

D Pan, C Ji, T Zhu - Applied Sciences, 2023 - mdpi.com
Featured Application Stable design of Combustor in industrial boiler and burner. Abstract
The response of flames' heat release to acoustic excitation is a critical factor for …

Effect of ignition position on the combustion instability of premixed methane-air in a semiopen duct

L Zheng, Y Miao, JJ Liu, X Shao, X Wang… - … Thermal and Fluid …, 2023 - Elsevier
Experiments were conducted in a semiopen chamber to investigate the combustion
instabilities of methane-air mixtures. The effect of ignition position (IP for short, ie, the …

Investigation of Harmonic Response in Non-Premixed Swirling Combustion to Low-Frequency Acoustic Excitations

J Bao, C Ji, D Pan, C Zong, Z Zhang, T Zhu - Aerospace, 2023 - mdpi.com
The propagation mechanism of flow disturbance under acoustic excitations plays a crucial
role in thermoacoustic instability, especially when considering the effect of non-premixed …

Experimental Study on Flame Response Characteristics of a Non-Premixed Swirl Model Combustor

C Yang, Y Liu, X Zhang, H Li, X Ge, F Jin, C Liu - Energies, 2023 - mdpi.com
Non-premixed swirl combustion has been widely used in pieces of industrial combustion
equipment such as industrial boilers, furnaces, and certain specific gas turbine combustors …

Acoustic Triggering of Combustion Instability in a Swirling Flame: An Experimental Study

Y Liu, Y Yan, S Shang, H Ma - Energies, 2023 - mdpi.com
Combustion instability is a common thermoacoustic coupling problem in combustion
systems, and the pressure oscillations generated inevitably damage the combustion system …

Limited driving characteristics of combustion instability in a swirling flame: An experimental study

Y Liu, J Li, Y Yan, S Shang - Fuel, 2023 - Elsevier
Regarding combustion instability, heat-release pulsation leads to pressure pulsation.
Conversely, the driving force of the pulsating flame restricts the oscillation equilibrium point …