Results 21 to 30 of about 139,572 (294)

Dynamics of premixed confined swirling flames

Comptes Rendus. Mécanique, 2009
Considerable effort is currently being extended to examine the fundamental mechanisms of combustion instabilities and develop methods allowing predictions of these phenomena. One central aspect of this problem is the dynamical response of the flame to incoming perturbations. This question is examined in the present article, which specifically considers
Palies, P., Durox, D., Schuller, Thierry, Morenton, P., Candel, S.   +4 more
openaire   +2 more sources

Combustion Dynamics of Swirling Turbulent Flames [PDF]

, 2001
A generalized Large-Eddy Simulation (LES) methodology has been developed to simulate premixed and non-premixed gas-phase and two-phase combustion in complex flows such as those typically encountered in gas-turbine combustors. This formulation allows the study and analysis of the fundamental physics involved in such flows, i.e., vortex/flame interaction,
Suresh Menon, Vaidyanathan Sankaran, Christopher P. Stone   +2 more
openaire   +1 more source

Effects of thermal expansion, strain rate, and gravity force on the steady propagation of a premixed flame in semi-closed channels

AIP Advances, 2021
The flame dynamics of steady propagation of a premixed flame in semi-closed channels is investigated. The hydrodynamic model takes into account impacts of channel width, thermal expansion, straining effect, and downward gravity force on the flame front ...
Yifan Han, Luhao Liu
doaj   +1 more source

The Interaction of High-Speed Turbulence with Flames: Global Properties and Internal Flame Structure

, 2011
We study the dynamics and properties of a turbulent flame, formed in the presence of subsonic, high-speed, homogeneous, isotropic Kolmogorov-type turbulence in an unconfined system.
A.Y. Poludnenko, Aspden, Bell, Bilger, Boger, Boris, Buschmann, Colella, Colella, Damköhler, Davidson, Dinkelacker, Driscoll, Dunn, E.S. Oran, Gamezo, Gamezo, Gardiner, Grinstein, Khokhlov, Kolmogorov, Lemaster, Libby, Liu, Mansour, Meneveau, Peters, Porter, Saltzman, Sankaran, Stone, Stone, Stone, Tanahashi, Williams, Zel’dovich, Zel’dovich   +36 more
core   +1 more source

A Review on Micro-Combustion Flame Dynamics and Micro-Propulsion Systems

Energies
This work presents a state-of-the-art review of micro-combustion flame dynamics and micro propulsion systems. In the initial section, we focus in on the different challenges of micro-combustion, investigating the typical length and time scales involved ...
David M. Dias, Pedro R. Resende, Alexandre M. Afonso   +2 more
doaj   +1 more source

Comparing Early Evolution of Flames in X-Ray Bursts in Two and Three Dimensions

The Astrophysical Journal, 2023
We explore the early evolution of flame ignition and spreading on the surface of a neutron star in three dimensions, in the context of X-ray bursts.
Michael Zingale, Kiran Eiden, Max Katz
doaj   +1 more source

Experimental and Numerical Study of the Trench Fire Spread Rule over a Sloped Uniform Fuel Bed: Rate of Fire Spread, Flame Morphology, and Heat Flux

Fire, 2023
Trench fires on sloped terrain are always complicated due to the corresponding flame dynamics and heat transfer mechanisms. Flame attachment may increase the rate of fire spread (ROS) by enlarging the heating area of unburned vegetation.
Yi Wang, Rui Huang
doaj   +1 more source

InAsSb Photodiode-Based Infrared Radiation Thermometer for the Investigation of Droplet Surface Temperature Dynamics Within an Enclosed Combustion Chamber

Sensors
This study presents a novel approach to analysing the early stages of the combustion process by measuring the surface temperature of a kerosene droplet from its point of ignition through to its evaporation.
Louis Karapateas, Emilios Leonidas, Xiangfei Meng, Yufeng Lai, Yang Zhang, Jon R. Willmott, Matthew J. Hobbs   +6 more
doaj   +1 more source

Large-Eddy Simulation of combustion instabilities in a variable-length combustor. [PDF]

, 2013
This article presents a simulation of a model rocket combustor with continuously variable acoustic properties thanks to a variable-length injector tube. Fully compressible Large-Eddy Simulations are conducted using the AVBP code.
Garby, Romain, Poinsot, Thierry, Selle, Laurent   +2 more
core   +3 more sources

Numerical Simulations of Forced Ignition and Flame Dynamics in an Ammonia/Air Mixing Layer

Energies
This work explores NH3/air non-premixed combustion in a mixing layer, with the objective of quantifying the influence of key parameters on ignition and flame dynamics. A series of two-dimensional simulations were conducted with forced ignition.
Zhuchuan Chang, Haiou Wang, Kun Luo, Jianren Fan   +3 more
doaj   +1 more source