Results 21 to 30 of about 23,143 (295)

Effects of Ethanol Blending on the Formation of Soot in n-Heptane/Air Coflow Diffusion Flame

Journal of Chemistry, 2020
Laminar diffusion flame was used to study the effect of ethanol on n-heptane flame in terms of the morphology and microstructure of soot under atomization combustion.
Yuchen Ya, Xiaokang Nie, Licheng Peng, Longkai Xiang, Jialong Hu, Wenlong Dong, Huaqiang Chu   +6 more
doaj   +1 more source

On the Use of Semi-empirical Flame Models for Spreading Chaparral Crown Fire

Frontiers in Mechanical Engineering, 2019
Flame geometry plays a key role in shaping fire behavior as it can influence flame spread, radiative heat transfer and fire intensity. For wildland fire, thorough characterizations of flame geometry can help advance the derivation of comprehensive models
Jeanette Cobian-Iñiguez, AmirHessam Aminfar, David R. Weise, Marko Princevac   +3 more
doaj   +1 more source

Multi-Scale Flame Situation Detection Based on Pixel-Level Segmentation of Visual Images

Applied Sciences, 2023
The accurate analysis of multi-scale flame development plays a crucial role in improving firefighting decisions and facilitating smart city establishment.
Xinzhi Wang, Mengyue Li, Quanyi Liu, Yudong Chang, Hui Zhang   +4 more
doaj   +1 more source

Experimental investigations of width effects and flame splitting phenomenon in upward flame spread over advertising canvas

Case Studies in Thermal Engineering, 2019
A series of comparative laboratory experiments were conducted to study the width effects and flame splitting phenomenon in upward flame spread. The test samples were 2.0 mm thick and 45 cm tall advertising canvas sheets with widths of 4.0–10.0 cm.
Sinian Gu, Xuemin Bu, Yunji Gao
doaj   +1 more source

Influence of Mountain Wildfires on the Insulation Properties of Air Gaps in Power Grids

Energies
The complex terrain of China frequently leads to wildfires, which in turn pose a threat to the safe operation of power transmission lines. Studying the breakdown characteristics of air gaps under wildfire conditions is of great significance for ...
Fangrong Zhou, Hao Geng, Gang Wen, Yutang Ma, Yi Ma, Guofang Wang, Jun Cao, Jiaze Xu, Hongwei Mei   +8 more
doaj   +1 more source

Response in Bunsen flame with variation in a natural gas composition and control for stabilizing the flame variation

Nihon Kikai Gakkai ronbunshu, 2020
This study investigated experimentally a response of premixed Bunsen flame to transient change in a fuel composition and a method to control the variation. Fuel mixtures were composed of methane, ethane and propane. The volumetric fraction of methane was
Shuichi UMEZAWA, Takuya ISHIBASHI, Michikazu OKAMOTO, Takeshi YOKOMORI, Toshihisa UEDA   +4 more
doaj   +1 more source

Flame projection lengths of horizontally oriented buoyant jet fires under different air pressures

Case Studies in Thermal Engineering, 2021
A horizontal buoyancy-controlled jet fire forms when a gaseous fuel leakage occurs in a pipe or a fuel tank and the fuel is ignited. In this study, the horizontal flame projection length (Lph) from such fires was experimentally investigated under ...
Jinfei Zhao, Jiahao Liu, Haihang Li, Jian Wang   +3 more
doaj   +1 more source

On flame height of circulation-controlled firewhirls with variable physical properties and in power-law vortices : a mass-diffusivity-ratio model correction

, 2017
This paper presents a theory on the flame height of circulation-controlled firewhirls, approximately combining variable physical properties, a power-law vortex model, and a mass-diffusivity-ratio model. The theoretical results show that the dimensionless
Yu, DH, Zhang, P, Dehai Yu, Peng Zhang
core   +1 more source

Effect of Nozzle Height on the Combustion Dynamics of Jet Fires in Rotating Flow Fields

Fire
In this paper, the effect of nozzle height on the combustion dynamics of jet fires in rotating flow fields (JFRFFs) is systematically investigated through experimental and numerical simulations.
Qiang Zhang, Jinjiang Wang, Laibin Zhang, Pengchao Chen, Xiaole Qin, Kuibin Zhou, Yufeng Yang, Jiancheng Shi   +7 more
doaj   +1 more source

Effect of Equivalence Ratio on Flame Morphology, Thermal and Emissions Characteristics of Inverse Diffusion Porous Burner [PDF]

Journal of Applied Fluid Mechanics
The diffusion porous media combustion is one possible way to eliminate the drawbacks of the existing combustion systems. Inverse diffusion flame (IDF) has features of both premixed and non-premixed flames.
A. Dekhatawala, P. V. Bhale, R. Shah
doaj   +1 more source