Flame dynamics and combustion instability induced by flow-flame interactions in a centrally-staged combustor

C Tao, C Zhang, X Xue, X Fan, J Gao, X Feng… - Aerospace Science and …, 2023 - Elsevier
This study mainly investigates the flame and flow characteristics under combustion instability
in a centrally-staged swirl spray combustor, using 5 kHz CH* chemiluminescence (CL) and …

Influence of inner shear layer on the emergence of central recirculation zone in a V-shaped premixed swirling flame

Q Wang, Y Ren, M Gu, B Yu, X Feng, F Qi, X Xia - Physics of Fluids, 2023 - pubs.aip.org
This paper presents an experimental study on the emergence of the central recirculation
zone (CRZ) in a basic V-shaped premixed swirling flame, using simultaneous measurement …

Evolution characteristics of 3D vortex structures in stratified swirling flames studied by dual-plane stereoscopic PIV

S Wang, J Zheng, L Li, Z Yang, X Xia, C Fu, Y Gao… - Combustion and …, 2022 - Elsevier
Stratified swirling flames are typically formed in centrally-staged combustors of modern aero
engines. The pilot flame plays an indispensable role in stabilizing the stratified swirling …

Experimental investigation of the helical mode in a stratified swirling flame

S Wang, J Zheng, L Xu, Q An, X Han, C Zhang, L Li… - Combustion and …, 2022 - Elsevier
In a centrally-staged combustor, the stratified swirling flame often manifests a helical mode,
which is characterized by the emergence of helical vortices, including the precessing vortex …

Complex network analysis of a premixed swirling flame influenced by precessing vortex core

Y Ren, Q Wang, Y Guan, X Xia, F Qi - Physics of Fluids, 2024 - pubs.aip.org
This work investigates the influences of precessing vortex cores (PVCs) on the coherent
interactions in the transient flow and heat release fields of a weak premixed swirling flame …

[HTML][HTML] Similarity phenomena of lean swirling flames at different bulk velocities with acoustic disturbances

RAO Zhuming, LI Ruichao, Z Peizhe, W Bing… - Chinese Journal of …, 2023 - Elsevier
In this study, flame responses to acoustic disturbances with different frequencies and
amplitudes were experimentally investigated in a lean premixed swirl-stabilized combustor …

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 …

The effects of injector size on the dynamics and instabilities of lean premixed swirling flame

G Wang, L Xu, L Li, X Liu, F Qi, TF Guiberti… - Aerospace Science and …, 2022 - Elsevier
The external-and self-excited premixed swirling flames are experimentally studied to
understand the thermoacoustic instabilities under different injector sizes. We use high-speed …

[HTML][HTML] Identification of coherent structures in distributed swirl-stabilized wet combustion

K Zhang, Y Shen, C Duwig - Fuel, 2021 - Elsevier
Towards achieving sustainable and decarbonized power, biomass to electricity is an
attractive pathway. To that end, the humidified gas turbine cycle is a promising technology …

An all-optical system for transit time estimation in fluids using single source and detector

AK Maurya, R Kumar, V Arumuru… - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
The estimation of vortex convection velocity and frequency of vortices is a challenging task
that requires sophisticated experimental and computational techniques. Several methods …