Results 241 to 250 of about 3,616,071 (302)

On the Dynamics of a Bunsen Flame

2006
The stabilization of a Bunsen flame above the burner rim is simulated using the method of characteristics. Oscilliations of the flame front and of its area due to flow oscilliations are computed.
Bondar, M.L., Thije Boonkkamp, ten, J.H.M.   +1 more
openaire   +1 more source

Novel perspectives on the dynamics of premixed flames

Combustion and Flame, 2013
The present study develops an alternative perspective on the response of premixed flames to flow perturbations. In particular, the linear response of laminar premixed flames to velocity perturbations is examined in the time domain, and the corresponding impulse response functions are determined analytically.
Blumenthal, RS, Subramanian, P, Sujith, RI, Polifke, W   +3 more
openaire   +2 more sources

Dynamic Electrochemistry in Flame Plasma Electrolyte

Angewandte Chemie, 2012
Chemistry in flames: Dynamic electrochemistry in the gas phase is described by considering the ionized medium of a flame as an electrolyte (see picture). This study opens up the possibility of accessing redox reactions that are outside the potential limits set by the solvent in conventional liquid-phase electrochemistry.
Atif, Elahi, Toks, Fowowe, Daren J, Caruana   +2 more
openaire   +2 more sources

Flame Root Dynamics and Their Role in the Stabilisation of Lifted Flames

2021
This chapter aims to provide a broad overview on the importance of lifted flames in turbulent flows with and without swirl in practical applications for energy production and propulsion. The stabilisation of lifted flames is governed by numerous physical processes that control the behaviour of the flame root or the leading edge.
James C. Massey, Zhi X. Chen, Nedunchezhian Swaminathan   +2 more
openaire   +1 more source

Flame dynamics and flammability limit of DME(30%)/LPG blended clean fuel in elongated closed pipeline under multi-factors

Fuel, 2019
DME(30%)/LPG blended clean fuel has been increasingly used worldwide for home cooking, heating and car driving. In order to figure out its explosion characteristics, an explosion and propagation experimental platform of multi-component gases was built ...
Qi Zhang, Yuying Chen, Tao Fan, Mengqi Yuan, Zhenyi Liu, Ping Huang, X. Qian   +6 more
semanticscholar   +1 more source

Multifractal analysis of flame dynamics during transition to thermoacoustic instability in a turbulent combustor

Journal of Fluid Mechanics, 2020
Gas turbine combustors are susceptible to thermoacoustic instability, which manifests as large amplitude periodic oscillations in acoustic pressure and heat release rate.
M. Raghunathan, N. B. George, Vishnu R Unni, P. R. Midhun, K. V. Reeja, R. Sujith   +5 more
semanticscholar   +1 more source

Laser excitation dynamics of OH in flames

Applied Optics, 1980
The response of OH in flames to laser excitation is studied in some detail. The population balance equations are solved numerically using an empirical model for the rotational relaxation rates. The empirical model parameters are fit to experimental spectra using a linear regression procedure and the resulting description of OH behavior is shown to be ...
C, Chan, J W, Daily
openaire   +2 more sources

Study on premixed flame dynamics of CH4/O2/CO2 mixtures

Fuel, 2019
In order to study the flame dynamics characteristics of premixed CH4/O2/CO2 mixtures, a series of experiments were carried out in an elongated square duct. The equivalence ratio ϕ was chosen as 0.6, 0.8, 1.0, 1.2 and 1.4, and the oxygen fraction γ in the
Ligang Zheng, D. Du, Jian Wang, Zengguo Dou, Xi Wang, Hongwang Jin, Yan Wang   +6 more
semanticscholar   +1 more source

Swirling Flame Dynamics and Describing Function

48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, 2010
The present article focuses on the dynamics and response of lean premixed confined swirling flames submitted to plane acoustic perturbations. The axial velocity disturbances and the heat release rate are recorded to determine the flame transfer function.
Paliès, P., Durox, D., Schuller, Thierry, Candel, S.   +3 more
openaire   +1 more source

Numerical study of the effects of laminar flame speed on flame dynamics in the early stages of flame propagation in two-dimensional half open tubes

, 2020
The effect of laminar flame speed on the flame dynamics in two-dimensional half open tubes is investigated through a two-dimensional laminar combustion model.
Deng Haoxin, Z. Yao, Chen Guoyan, X. Wen, Fahui Wang, Qiaosheng Zhang, Jianfei Dong, Mingming Huang   +7 more
semanticscholar   +1 more source