Large-eddy simulations of self-excited thermoacoustic instability in a premixed swirling combustor with an outlet nozzle

Y Sun, D Zhao, C Ji, T Zhu, Z Rao, B Wang - Physics of Fluids, 2022 - pubs.aip.org
Reducing the footprint of greenhouse gases and nitrogen oxides (NOx) emissions from
combustion systems means that they have been operating under lean or ultra-lean fuel–air …

[HTML][HTML] Predicting thermoacoustic stability characteristics of longitudinal combustors using different endpoint conditions with a low Mach number flow

X Zhao, D Zhao, L Cheng, CM Shelton, J Majdalani - Physics of Fluids, 2023 - pubs.aip.org
Combustion instability frequently occurs in propulsion and power generation systems. It is
characterized by large-amplitude acoustic oscillations leading to undesirable …

A comprehensive investigation of LSTM-CNN deep learning model for fast detection of combustion instability

Z Lyu, X Jia, Y Yang, K Hu, F Zhang, G Wang - Fuel, 2021 - Elsevier
In this paper, we propose a deep learning model to detect combustion instability using high-
speed flame image sequences. The detection model combines Convolutional Neural …

Multi-scale proper orthogonal decomposition analysis of instabilities in swirled and stratified flames

A Procacci, MM Kamal, MA Mendez, S Hochgreb… - Physics of …, 2022 - pubs.aip.org
This study examines the flow field dynamics of bluff-body stabilized swirling and non-
swirling flames produced from the Cambridge/Sandia Stratified Swirl Burner. This burner …

Investigation of flame and flow response in the swirler with different divergence cups and central body under external excitation

Y Yang, G Wang, H Wu, Z Zhu, C Ma, J Li - Physics of Fluids, 2023 - pubs.aip.org
Effects of swirl divergence cup and the central bluff body on premixed flame response with
external excitation are experimentally investigated. Flame transfer functions (FTFs) …

Experimental investigations on central vortex core in swirl spray flames using high-speed laser diagnostics

C Zhang, C Tao, H Song, X Han, L Li, X Liu, F Qi - Physics of Fluids, 2023 - pubs.aip.org
Centrally staged swirl combustion can effectively reduce NO x emission. However, the
complex combustion field is susceptible to producing large-scale coherent structures, such …

Large-eddy simulation of unstable non-reactive flow in a swirler combustor

N Meng, F Li - Physics of Fluids, 2022 - pubs.aip.org
A comprehensive study on the influence of the unsteady non-reactive flow characteristics of
turbulent flow in a three-stage swirl combustion chamber using power spectral density …

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 …

Analysis of self-excited transverse combustion instability in a rectangular model rocket combustor

K Guo, Y Ren, Y Tong, W Lin, W Nie - Physics of Fluids, 2022 - pubs.aip.org
A methane/oxygen mixture is considered to be an appropriate propellant for many future
rocket engines due to its practicality and low cost. To better understand the combustion …

The effect of swirling injector geometry on the flow dynamics of precessing vortex core

J Zhu, Y Yang, Y Fang, G Wang, Y Zheng - Physics of Fluids, 2024 - pubs.aip.org
Precessing vortex core (PVC), a typical vortex structure, universally exists in swirling flow
fields and originates from the Kelvin–Helmholtz instability of the swirling shear layer. In the …