Results 11 to 20 of about 670,649 (179)

Turbulent Premixed Flame Kernel Growth During The Early Stages Using Direct Numerical Simulation [PDF]

open access: yes, 2008
In this thesis Direct Numerical Simulation (DNS) is used to investigate the development of turbulent premixed flame kernels during the early stages of growth typical of the period following spark ignition.
Dunstan, T. D.
core   +7 more sources

Turbulent flame development in a high-pressure combustion vessel [PDF]

open access: yes, 2005
The objective of this work was to extend the range of turbulent burning velocities presented in the literature by performing new measurements at elevated pressures over a range of turbulent velocities, u' (r. m. s. deviation from the mean velocity).
Ormsby, Matthew P.
core   +7 more sources

Flow and combustion in disc and pent-roof SI engines [PDF]

open access: yes, 2006
Reported in this thesis is a study of combustion in a disc-shaped combustion chamber spark ignition engine, and in-cylinder flow and combustion in an idealised pent-roof spark ignition engine. Both engines were skip fired, to remove residuals and ensure
Murad, Ahmad E. M. A
core   +6 more sources

Improvement and validation of a thermodynamic S.I. engine simulation code [PDF]

open access: yes, 2003
This study was concerned with improvement and validation of a thermodynamic spark ignition engine simulation code developed in Leeds. Experimental validation data were generated using a central ignition, disc-shaped combustion chamber variant of a ...
Abdi Aghdam, Ebrahim
core   +7 more sources

Ultra-Lean Gaseous Flames in Terrestrial Gravity Conditions

open access: yesFluids, 2021
Development of the combustion process in the gaseous mixtures of near-limit composition is of great interest for fundamental aspects of combustion theory and fire-safety applications.
Ivan Yakovenko   +2 more
doaj   +1 more source

Fundamental studies of combustion of droplet and vapour mixtures [PDF]

open access: yes, 2010
There are few experimental data of a fundamental nature that clearly demonstrate the similarities and differences in burning rates between single phase and two phase combustion, either in laminar or turbulent conditions. Such data are essential towards a
Saat, Aminuddin
core   +6 more sources

Experimental Study of Influence on Microwave Plasma Ignition Combustion Performance of Pulse Microwave Signals

open access: yesIEEE Access, 2019
It has been demonstrated by a large number of studies that microwave ignition can greatly extend the lean-burn limit in the internal combustion engines. This paper investigates the influence of the pulse period and duty cycle of pulsed microwave signals ...
Zhongli Wang   +5 more
doaj   +1 more source

Numerical Study and Experimental Validation of Minimum Ignition Energy for Microwave Spark Ignition

open access: yesIEEE Access, 2021
Microwave plasma ignition has the potential for energy savings and emission reductions, and the minimum ignition energy (MIE) and the lean limit can be determined by microwave spark plugs (MSPs) under the same microwave power. To predict the relationship
Yaoyao Wang   +3 more
doaj   +1 more source

Stability of a spherical flame ball in a porous medium [PDF]

open access: yes, 2000
Gaseous flame balls and their stability to symmetric disturbances are studied numerically and asymptotically, for large activation temperature, within a porous medium that serves only to exchange heat with the gas.
Thatcher, R.   +6 more
core   +1 more source

A Development of a New Image Analysis Technique for Detecting the Flame Front Evolution in Spark Ignition Engine under Lean Condition

open access: yesVehicles, 2022
The aim of herein work is to develop an automatized algorithm for detecting, as objectively as possible, the flame front evolution of lean/ultra-lean mixtures ignited by low temperature plasma-based ignition systems. The low luminosity characterizing the
Luca Petrucci   +3 more
doaj   +1 more source

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