Results 1 to 10 of about 5,196 (262)

Numerical Modeling of Combustion and Detonation in Aqueous Foams

Energies, 2021
Combustible aqueous foams and foamed emulsions represent prospective energy carriers. This paper is devoted to the overview of model assumptions required for numerical simulations of combustion and detonation processes in aqueous foams.
Alexey Kiverin, Ivan Yakovenko
doaj   +1 more source

The Propagation Characteristics of Turbulent Expanding Flames of Methane/Hydrogen Blending Gas

Energies
In the present study, the effect of hydrogen addition on turbulent flame propagation characteristics is investigated in a fan-stirred combustion chamber.
Haoran Zhao, Chunmiao Yuan, Gang Li, Fuchao Tian   +3 more
doaj   +1 more source

Promotion of deflagration-to-detonation transition by repeated obstacle rods

Journal of Thermal Science and Technology, 2021
We experimentally investigated the promotion of deflagration-to-detonation transition (DDT) in hydrogen-air mixtures contained in a tube in which straight-shaped rods were installed as obstacles.
Yoko SEKI, Ryuji KOBAYASHI, Wookyung KIM, Tomoyuki JOHZAKI, Takuma ENDO   +4 more
doaj   +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

Flame Acceleration Enhancement by Distributed Ignition Points

Journal of Propulsion and Power, 2005
This paper reports on the investigation of a novel method for promoting flame acceleration leading to detonation initiation in a tube. A common method used to initiate a detonation wave is via flame acceleration in an obstacle laden tube. Previous studies with fuel-air mixtures have shown that the measured detonation run-up distance, and corresponding ...
Ciccarelli, Gaby, Johansen, Craig, Hickey, Mark   +2 more
openaire   +2 more sources

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

Critical Criterion for Flame Spread Acceleration of Concave Surfaces with Different Curvatures

Fire
Concave surface is a common geometry in both industrial buildings and natural environments; the flame spread behaviors on this special surface are worth studying, while few studies have been completed yet.
Yang Zhou, Haoteng Chen, Xu Yan
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

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

Detonation initiation in a channel via facing injection of flame jets

Nihon Kikai Gakkai ronbunshu, 2017
Detonation transition was experimentally investigated using flame jetting through the orifice of a small sub-chamber, which was equipped on the side wall near the closed end of the main channel (square inner closs section, 50 mm on a side) filled with a ...
Shinichi MAEDA, Ryota AOSHIMA, Tetsuro KUROSAWA, Tetsuro OBARA   +3 more
doaj   +1 more source