Results 21 to 30 of about 633,794 (335)

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

Simulation of Hydrogen-Air-Diluents Mixture Combustion in an Acceleration Tube with FlameFoam Solver

Energies, 2021
During a severe accident in a nuclear power plant, hydrogen can be generated, leading to risks of possible deflagration and containment integrity failure. To manage severe accidents, great experimental, analytical, and benchmarking efforts are being made
Mantas Povilaitis, Justina Jaseliūnaitė   +1 more
doaj   +1 more source

Flame transfer function measurement of a sequential combustor fuelled with natural gas and hydrogen [PDF]

Combustion and Flame
The flame transfer function (FTF) relates acoustic perturbations and the coherent heat release rate response. This frequency-dependent function governs the thermoacoustic stability of a combustor.
Bayu Dharmaputra, Pushkin Nagpure, Matteo Impagnatiello, N. Noiray   +3 more
semanticscholar   +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

Acoustic and Large Eddy Simulation studies of azimuthal modes in annular combustion chambers [PDF]

, 2012
The objectives of this paper are the description of azimuthal instability modes found in annular combus- tion chambers using two numerical tools: (1) Large Eddy Simulation (LES) methods and (2) acoustic solv- ers.
Gicquel, Laurent Y.M., Müller, Jens-Dominik, Poinsot, Thierry, Staffelbach, Gabriel, Wolf, Pierre   +4 more
core   +4 more sources

Entropy and flame transfer function analysis of a hydrogen-fueled diffusion flame in a longitudinal combustor

Energy, 2020
In this work, entropy generation and flame transfer function investigations are conducted on a hydrogen-burnt diffusion flame in a longitudinal combustor with acoustic waves present.
Yuze Sun, Dan Zhao, Siliang Ni, T. David, Yang Zhang   +4 more
semanticscholar   +1 more source

Synchronization framework for modeling transition to thermoacoustic instability in laminar combustors

, 2020
We, herein, present a new model based on the framework of synchronization to describe a thermoacoustic system and capture the multiple bifurcations that such a system undergoes.
Saha, Abhishek, Sujith, R. I., Unni, Vishnu R., Weng, Yue   +3 more
core   +1 more source