Results 11 to 20 of about 16,763 (260)

An Experimental Investigation on Flame Pulsation for a Swirl Non-Premixed Combustion

Energies, 2018
Flame pulsation has a significant effect on combustion, and understanding its oscillatory behavior is important to the combustion community. An experiment was performed to analyze the pulsation characteristics of a swirl non-premixed flame under various ...
Zhongya Xi, Zhongguang Fu, Xiaotian Hu, Syed Waqas Sabir, Yibo Jiang   +4 more
doaj   +1 more source

Combustion Characteristics of Premixed Hydrogen/Air in an Undulate Microchannel

Energies, 2022
This work reports a numerical investigation of microcombustion in an undulate microchannel, using premixed hydrogen and air to understand the effect of the burner design on the flame in order to obtain stability of the flame.
Pedro R. Resende, Leandro C. Morais, Carlos Pinho, Alexandre M. Afonso   +3 more
doaj   +1 more source

Dynamics of cool flames

Progress in Energy and Combustion Science, 2019
Abstract Cool flames play a critical role in ignition timing, burning rate, burning limits, engine knocking, and emissions in conventional and advanced combustion engines. This paper provides an overview of the recent progress in experimental and computational studies of cool flames.
Yiguang Ju, Christopher B. Reuter, Omar R. Yehia, Tanvir I. Farouk, Sang Hee Won   +4 more
openaire   +2 more sources

On the dynamics of flame edges in diffusion-flame/vortex interactions [PDF]

Combustion and Flame, 2007
We analyze the local flame extinction and reignition of a counterflow diffusion flame perturbed by a laminar vortex ring. Local flame extinction leads to the appearance of flame edges separating the burning and extinguished regions of the distorted mixing layer.
Hermanns Navarro, Miguel, Vera Coello, Marcos, Liñán Martínez, Amable   +2 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

The Interaction between In-Cylinder Turbulent Flow and Flame Front Propagation in an Optical SI Engine Measured by High-Speed PIV

Energies, 2022
The relationship between the flow field and flame propagation is essential in determining the dynamics and effects of turbulent flow in an optical SI engine.
Yuji Ikeda
doaj   +1 more source

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

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

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

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