Results 31 to 40 of about 760,958 (323)

Radiation heat transfer in particle-laden gaseous flame: Flame acceleration and triggering detonation [PDF]

Acta Astronautica, 2015
In this study we examine influence of the radiation heat transfer on the combustion regimes in the mixture, formed by suspension of fine inert particles in hydrogen gas. The gaseous phase is assumed to be transparent for the thermal radiation, while the radiant heat absorbed by the particles is then lost by conduction to the surrounding gas.
Liberman, M. A., Ivanov, M. F, Kiverin, A. D.   +2 more
openaire   +2 more sources

Study on inhomogeneous hydrogen–air mixture flame acceleration and deflagration-to-detonation transition

The Physics of Fluids
This paper discusses the effect of obstacle spacing on flame acceleration (FA) and deflagration-to-detonation transition (DDT) in inhomogeneous hydrogen–air mixture using the OpenFOAM open-source code and large eddy simulation technology based on the ...
Guogang Yang, Zhonghua Sheng, Shian Li, Qiuwan Shen, Han Sun, Zhuangzhuang Xu   +5 more
semanticscholar   +1 more source

Study on Hydrogen Combustion Flame Acceleration Mechanism and Prediction Method During Severe Accidents in Nuclear Power Plants

Energies
Combustion caused by hydrogen-dominated combustible gas mixtures presents critical threats to nuclear safety during severe accidents in nuclear power plants, primarily due to their propensity for flame acceleration, deflagration, and subsequent ...
Ran Liu, Jingyi Yu, Xiaoming Yang, Yong Liu, Rubing Ma, Yidan Yuan   +5 more
doaj   +1 more source

Experimental and Numerical Study of Gas Injection Effect on the Methane–Air Combustion inside a Coaxial Burner

Fluids, 2021
This paper is devoted to the analysis of the effect of gas injection on the efficiency of gaseous fuel burning. A coaxial burner with a perforated inner wall is presented in which the methane–air acceleration is observed.
Alexey Kiverin, Boris Kichatov, Alexey Korshunov, Vladimir Gubernov, Ivan Yakovenko, Andrey Yarkov   +5 more
doaj   +1 more source

Premixed flame propagation in vertical tubes

, 2015
Analytical treatment of premixed flame propagation in vertical tubes with smooth walls is given. Using the on-shell flame description, equations describing quasi-steady flame with a small but finite front thickness are obtained and solved numerically. It
Kazakov, Kirill A.
core   +1 more source

Nonlinear cellular instabilities of planar premixed flames: numerical simulations of the Reactive Navier-Stokes equations [PDF]

, 2006
Two-dimensional compressible Reactive Navier-Stokes numerical simulations of intrinsic planar, premixed flame instabilities are performed. The initial growth of a sinusoidally perturbed planar flame is first compared with the predictions of a recent ...
G. J. Sharpe, Glassman I., Rogg B., S. A. E. G. Falle, Strehlow R. A., Williams F. A., Zel'dovich Y. B.   +6 more
core   +1 more source

Numerical analysis of flow fields generated by accelerating flames [PDF]

17th Aerospace Sciences Meeting, 1979
A numerical technique is presented for the analysis of nonsteady flowfields generated by accelerating flames in gaseous media. The problem is formulated in Eulerian coordinates and the solution is based on the extension of the floating shock-fitting technique to all the discontinuities and their interactions occurring in the flowfield.
Kurylo, J., Dwyer, H.A., Oppenheim, A.K.
openaire   +1 more source

Flame acceleration and detonation transition in premixed and inhomogeneous supersonic flows

Journal of Fluid Mechanics
The reactive Navier–Stokes equations with adaptive mesh refinement and a detailed chemical reactive mechanism (11 species, 27 steps) were adopted to investigate a detonation engine considering the injection and supersonic mixing processes.
Wandong Zhao, R. Deiterding, Xiaodong Cai, Jianhan Liang, Xiong Yang, Mingbo Sun   +5 more
semanticscholar   +1 more source

Flame acceleration in unconfined lean hydrogen-oxygen mixtures using a hemispherical soap bubble method

Green Energy and Resources
This study investigates the flame acceleration dynamics in lean hydrogen-oxygen mixtures, focusing on critical parameters such as Péclet number, Markstein number, and the acceleration exponent.
Wookyung Kim, Keita Tanaka, Akihiro Ueda, Sushil Raut, Yangkyun Kim, Hongliang Luo   +5 more
doaj   +1 more source

Laser-Plasma Acceleration with FLAME and ILIL Ultraintense Lasers

Applied Sciences, 2013
We report on the development of radiation and electron sources based on laser-plasma acceleration for biomedical and nuclear applications, using both the table top TW laser at ILIL and the 220 TW FLAME laser system at LNF.
Naveen Pathak, Tadzio Levatoy, Luca Labate, Petra Koester, Danilo Giulietti, Antonio Giulietti, Giancarlo Gatti, Giampiero Di Pirro, Andrea Gamucci, Carlo Benedetti, Carlo Alberto Cecchetti, Leonida Antonio Gizzi, Francesco Piastra   +12 more
doaj   +1 more source