Results 11 to 20 of about 21,289 (291)

Impact of symmetry breaking on the Flame Transfer Function of a laminar premixed flame [PDF]

Proceedings of the Combustion Institute, 2019
This work presents a numerical study of the acoustic response of a laminar flame with tunable asymmetry. A V-shaped premixed flame is stabilised in the wake of a cylindrical flame holder that can be rotated. The configuration is symmetric when the flame holder is fixed but increasing its rotation rate breaks the symmetry of the flow. This configuration
Kaiser, Thomas, Oztarlik, Gorkem, Selle, Laurent, Poinsot, Thierry   +3 more
openaire   +5 more sources

Influence of flame-holder temperature on the acoustic flame transfer functions of a laminar flame [PDF]

Combustion and Flame, 2018
The occurrence of combustion instabilities in high-performance engines such as gas turbines is often affected by the thermal state of the engine. For example, strong bursts of pressure fluctuations may occur at cold start for operating conditions that are stable once the engine reaches thermal equilibrium.
Daniel Mejia, Maxence Miguel-Brebion, Abdulla Ghani, Thomas Kaiser, Florent Duchaine, Laurent Selle, Thierry Poinsot   +6 more
openaire   +4 more sources

Design and Decomposition Analysis of Mixing Zone Structures on Flame Dynamics for a Swirl Burner

Energies, 2020
The recirculation zone and the swirl flame behavior can be influenced by the burner exit shape, and few studies have been made into this structure. Large eddy simulation was carried out on 16 cases to distinguish critical geometry factors.
Yang Yang, Zhijian Yu
doaj   +1 more source

Calculation and analysis of the flamelet library for numerical modelling of the non-premixed combustion of natural gas in a pilot burner [PDF]

E3S Web of Conferences, 2023
The flamelet modelling concept has been employed for numerical simulation of the non-premixed combustion of natural gas in a pilot burner of novel type. This prospective laboratory-scale burner device is featured by axial supply of high-speed jet of flue
Krasinsky Denis
doaj   +1 more source

Analysis of V-Gutter Reacting Flow Dynamics Using Proper Orthogonal and Dynamic Mode Decompositions

Energies, 2020
The current work is focused on investigating the potential of data-driven post-processing techniques, including proper orthogonal decomposition (POD) and dynamic mode decomposition (DMD) for flame dynamics.
Yang Yang, Xiao Liu, Zhihao Zhang
doaj   +1 more source

A Flame-Detection Algorithm Using the Improved YOLOv5

Fire, 2023
Flame recognition is an important technique in firefighting, but existing image flame-detection methods are slow, low in accuracy, and cannot accurately identify small flame areas. Current detection technology struggles to satisfy the real-time detection
Xingang Xie, Ke Chen, Yiran Guo, Botao Tan, Lumeng Chen, Min Huang   +5 more
doaj   +1 more source

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

Energies, 2023
Combustion instability is a common thermoacoustic coupling problem in combustion systems, and the pressure oscillations generated inevitably damage the combustion system. Studying the mechanism of combustion instability, especially the triggering problem
Yunpeng Liu, Yingwen Yan, Shoutang Shang, Hongyu Ma   +3 more
doaj   +1 more source

Working Condition Recognition Based on Transfer Learning and Attention Mechanism for a Rotary Kiln

Entropy, 2022
It is difficult to identify the working conditions of the rotary kilns due to the harsh environment in the kilns. The flame images of the firing zone in the kilns contain a lot of working condition information, but the flame image data sample size is too
Yuchao Hu, Weihua Zheng, Xin Wang, Bin Qin   +3 more
doaj   +1 more source

Development of water heater using tubular flame - Heat transfer characteristics on the coiled tube and the inserted tube heat exchangers -

Mechanical Engineering Journal, 2014
The purpose of this study is to develop the compact auxiliary water heater using tubular flame for home CHP (combined heat and power). The tubular-flame water-heater consists of the tubular flame burner, the coiled tube heat exchanger and the inserted ...
Ryosuke MATSUMOTO, Tatsuro TANIKAWA, Tatsuya SUGIMOTO, Mamoru OZAWA, Yoshinori HISAZUMI, Tsukasa HORI, Noriko KAWAI, Akeshi KEGASA, Yosuke SHIRAGA, Toshikazu TAKEMORI, Masashi KATSUKI   +10 more
doaj   +1 more source

Influences of Sub-Atmospheric Pressure on Upward Flame Spread over Flexible Polyurethane Foam Board with Multiple Inclinations

Applied Sciences, 2020
Fire propagation and burning characteristics of upward flame spread over flexible polyurethane (FPU) foam board were investigated under coupling effects of pressure and orientation. As a further comparative research of our previous work, three pressures (
Ran Tu, Xin Ma, Yi Zeng, Xuejin Zhou, Qixing Zhang   +4 more
doaj   +1 more source