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An extended flame index partitioning for partially premixed combustion [PDF]

Combustion Theory and Modelling, 2021
International audienceCompared to partially premixed combustion (or combustion of non-homogeneous reactants in general), fully premixed and diffusion flames represent only two asymptotic limits of combustion modes. However, the deep knowledge accumulated
Daniel Mira, Arnaud Mura
exaly   +3 more sources

Numerical Study On Combustion Characteristics Of Partially Premixed Tubular Flame Burner For DME

Combustion Science and Technology, 2019
The combustion characteristics of dimethyl ether (DME) in a partially premixed tubular flame burner have been investigated numerically. The species distribution, stability limit of tubular flame, wall temperature and burn-off rate have been studied at ...
Shoujun Ren, Haolin Yang, Liqiao Jiang   +2 more
exaly   +2 more sources

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Simulation of Premixed and Partially Premixed Jet-in-Crossflow Flames at High-Pressure

Volume 4B: Combustion, Fuels, and Emissions, 2020
Abstract In this paper we explore the operational map of a lean axial-staged combustor of premixed and partially premixed reacting jet-in-crossflow flames at high-pressure (5 atm). This study attempts to expand the data to relatively high pressure and could significantly aid scaling to real gas turbine engine conditions at 20–30 atm ...
Bernhard Stiehl, Michelle Otero, Tommy Genova, Tyler Worbington, Jonathan Reyes, Scott Martin, Carlos Velez, Kareem Ahmed   +7 more
openaire   +1 more source

Extinction of partially premixed flames

Proceedings of the Combustion Institute, 2002
Experimental and numerical studies on extinction of laminar partially premixed flames are carried out. The studies are performed in the counterflow configuration. A premixed fuel-rich mixture of methane (CH 4 ), oxygen (O 2 ), and nitrogen (N 2 ) is injected from one duct while a fuel-lean mixture of CH 4 , O 2 , and N 2 is injected from the other ...
R. Seiser, L. Truett, K. Seshadri
openaire   +1 more source

Flame stretch effects on partially premixed flames

Combustion and Flame, 2000
Abstract Flame stretch is an important characteristic of flame behavior that arises due to flow motion and nonuniformity, and flame curvature. Various investigators have obtained different expressions for flame stretch by employing dissimilar analytical approaches for diverse flame configurations.
Chun W Choi, Ishwar K Puri
openaire   +1 more source

Flame index and its statistical properties measured to understand partially premixed turbulent combustion

Combustion and Flame, 2015
This work addresses some fundamental questions in the area of partially premixed combustion-what parameters control the fraction of flamelets that are premixed (versus non-premixed), and what are the locations of high probability of premixed (versus non ...
David A Rosenberg, Patton M Allison, James F Driscoll   +2 more
exaly   +1 more source

Experimental and numerical study of a conical turbulent partially premixed flame

Proceedings of the Combustion Institute, 2009
The structure and dynamics of a turbulent partially premixed methane/air flame in a conical burner were investigated using laser diagnostics and large-eddy simulations (LES). The flame structure inside the cone was charecterized in detail using LES based
R Yu, Zhiwei Sun, Xue-Song Bai
exaly   +2 more sources

Partially premixed turbulent flame propagation in jet flames

Symposium (International) on Combustion, 1994
Flamelet formulations for premixed and non-premixed combustion are combined in order to treat partiallypremixed combustion in the fast chemistry limit. The flamelet concept for non-premixed combustion is based on the equation for the mixture fraction Z (x, t ), while that for premixed combustion uses a field equation for the scalar field G (x, t ...
C.M. Müller, H. Breitbach, N. Peters
openaire   +1 more source

NO formation in counterflow partially premixed flames

Combustion and Flame, 2007
An experimental and computational study of NO formation in low-strain-rate partially premixed methane counterflow flames is reported. For progressive fuel-side partial premixing the peak NO concentration increased and the NO distribution along the stagnation streamline broadened.
Hemant Mungekar, Arvind Atreya
openaire   +1 more source

Partial premixing in diffusion flame quenching

ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, 2001
AbstractUsing Direct Numerical Simulation, we focus on the development of partial premixing in laminar diffusion flame quenching. Calculations are performed in the configuration of a 2‐D diffusion flame squeezed by a pair of vortices. First, the flame undergoes strong finite rate chemistry effects, linked to high levels of strain rate induced by ...
Favier, V., Vervisch, L.
openaire   +2 more sources