Results 41 to 50 of about 635,474 (345)

Amplification of turbulence level by a flame and turbulent flame velocity

Combustion and Flame, 1972
In turbulent combustion, the existence of turbulence increnses the flame velocity markedly, while the flame augments the intensity of turbulence. A consideration of this interaction between a flame and the aerodynamics (turbulence) has led to a set of equations from which turbulent flame velocities can be calculated with reasonable accuracy over a wide
openaire   +2 more sources

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

Power-Law Wrinkling Turbulence-Flame Interaction Model for Astrophysical Flames

, 2014
We extend a model for turbulence-flame interactions (TFI) to consider astrophysical flames with a particular focus on combustion in type Ia supernovae.
Calder, Alan C., Jackson, Aaron P., Townsley, Dean M.   +2 more
core   +1 more source

Direct Numerical Simulations of the Impact of High Turbulence Intensities and Volume Viscosity on Premixed Methane Flames

Journal of Combustion, 2011
Parametric direct numerical simulations (DNS) of turbulent premixed flames burning methane in the thin reaction zone regime have been performed relying on complex physicochemical models and taking into account volume viscosity (κ). The combined effect of
Gordon Fru, Gábor Janiga, Dominique Thévenin   +2 more
doaj   +1 more source

Flow divergence in the turbulent premixed flames

Nihon Kikai Gakkai ronbunshu, 2014
In order to elucidate the flow divergence in the rich propane-air turbulent premixed flames, the flow fields of lean and rich propane-air and methane-air turbulent premixed flames of the identical conditions of laminar burning velocity and characteristic
Yasuko YOSHIDA, Junichi FURUKAWA, Forman A. WILLIAMS   +2 more
doaj   +1 more source

Turbulent Effects on the Flame behavior of Turbulent Counterflow Nonpremixed Flames.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B, 1999
The flow field of the turbulent counterflowing stream with and without nonpremixed flames, and the behavior of diffusion region of turbulent nonpremixed flames have been investigated experimentally. The turbulent characteristics of each side flow in a counterflowing stream would be regarded as keeping their initial turbulent characteristics from one ...
Akio KITAJIMA, Toshihisa UEDA, Akiko MATSUO, Masahiko MIZOMOTO   +3 more
openaire   +2 more sources

Turbulent partially cracked ammonia/air premixed spherical flames

Fuel Communications
The combustion of ammonia requires, for most energy conversion systems, a combustion promoter such as hydrogen to guarantee the start-up, stability and combustion efficiency.
S. Zitouni, P. Bréquigny, C. Mounaïm-Rousselle   +2 more
doaj   +1 more source

Burning velocity and flame structure of CH4/NH3/air turbulent premixed flames at high pressure

International journal of hydrogen energy, 2019
Ammonia is one of the most promising alternative fuels. In particular, ammonia combustion for gas turbine combustors for power generation is expected.
Akinori Ichikawa, Yuji Naito, A. Hayakawa, Taku Kudo, Hideaki Kobayashi   +4 more
semanticscholar   +1 more source

A return to normality: A descriptive qualitative interview study exploring the patient experience of gout flare resolution

Arthritis Care &Research, Accepted Article.
Objectives While the definition of a gout flare is well established, the state of gout flare resolution has not yet been defined. This study aimed to explore patients’ experiences and perceptions of gout flare resolution. Methods Semi‐structured interviews were conducted with 24 people with gout, guided by open‐ended questions exploring their ...
Sarah Stewart, Anne Horne, Angelo Gaffo, Lisa K Stamp, N Lawrence Edwards, Nicola Dalbeth   +5 more
wiley   +1 more source

Direct Numerical Simulation Analysis of the Closure of Turbulent Scalar Flux during Flame–Wall Interaction of Premixed Flames within Turbulent Boundary Layers

Energies
The statistical behaviour and modelling of turbulent fluxes of the reaction progress variable and non-dimensional temperature in the context of Reynolds-Averaged Navier–Stokes (RANS) simulations have been analysed for flame–wall interactions within ...
Umair Ahmed, Sanjeev Kumar Ghai, Nilanjan Chakraborty   +2 more
doaj   +1 more source