Numerical and experimental investigation of a mild combustion burner

Galletti, Chiara; Parente, Alessandro; Tognotti, Leonardo

doi:10.1016/j.combustflame.2007.07.016

Cited by 178 publications

(95 citation statements)

References 12 publications

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“…This is in agreement with the observation that in the MILD combustion regime there is a decrease in chemical reaction rates (Galletti et al, 2007;Ihme & See, 2011). The modification of C τ (inversely proportional to R i , from Eq.…”

Section: Downloaded By [University Of Adelaide Libraries] At 17:01 11supporting

confidence: 81%

“…A characteristic of the MILD regime is a distributed, homogeneous reaction zone, without flame temperature peaks and reduced pressure variations. Under these conditions, the Damköhler number (Da) is near unity in the reaction region (Galletti et al, 2007), indicating that both chemical and turbulence time scales are important in describing the MILD regime. A number of experimental studies into the mechanics of the MILD combustion regime have been performed using simplified jet flames in low oxygen, heated coflows.…”

Section: Introductionmentioning

confidence: 99%

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Modeling Lifted Jet Flames in a Heated Coflow Using an Optimized Eddy Dissipation Concept Model

Evans

Medwell

Tian

2015

Combustion Science and Technology

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Section: Downloaded By [University Of Adelaide Libraries] At 17:01 11supporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Modeling Lifted Jet Flames in a Heated Coflow Using an Optimized Eddy Dissipation Concept Model

Evans

Medwell

Tian

2015

Combustion Science and Technology

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“…Many researchers have used numerical simulations to study MILD and flameless combustion [33][34][35]. The open chamber studied here (Figure 1) is 1.0m high and 0.6m wide and was simulated using FLUENT 14.5.…”

Section: Simulation Setupmentioning

confidence: 99%

Effect of Air-Fuel Ratio on Temperature Distribution and Pollutants for Biogas Mild Combustion

Noor¹,

Wandel

Yusaf³

2014

Int. J. Automot. Mech. Eng.

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This paper examines the effect of air-fuel ratio for Moderate or Intense Low oxygen Dilution (MILD) combustion using a bluff-body burner. Exhaust gas recirculation was used to dilute the oxidizer stream prior to the combustion chamber. A low-calorie biogas fuel which consists of 60% methane and 40% carbon dioxide were used in the simulations using a Reynolds-averaged Navier-Stokes model with the realizable k-ε turbulence model. The chamber temperature distribution was found to be in small ranges and almost homogeneously distributed, verifying that MILD conditions were attained. The performance was evaluated based on the level of pollutants (Unburned hydrocarbons (UHC) and carbon-mono oxide (CO)) produced and measured in the exhaust gas. Slightly lean conditions produced negligible pollutants with some excess oxygen measured in the exhaust gas. Under rich conditions, UHC and CO were produced, but when synthetic air containing oxygen with a mole fraction of 7% was used as the oxidizer instead of ordinary air, these levels were significantly reduced.

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“…Adicionalmente a éstos dos grandes grupos de disposiciones mencionadas, se han incorporado dos nuevos conceptos en busca de incrementar la eficiencia del sistema [46]: Los sistemas recirculantes y los no-recirculantes, los cuales al combinarse con ambas disposiciones (de un solo paso y de terminal simple), dan origen a un gran número de posibilidades que permiten incrementar la eficiencia y calidad del proceso. La principal diferencia que identifica los funcionamientos, son los quemadores de alta velocidad, necesarios en los sistemas recirculantes, para la reducción de NOx y la uniformidad del calentamiento [15], [54], [55].…”

Section: De Terminal Simpleunclassified

La radiación infrarroja como mecanismo de transferencia de calor de alta calidad en procesos de calentamiento

2012

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En este artículo se pretende abordar la radiación infrarroja como un mecanismo principal de transferencia de calor de alta calidad en diferentes procesos de calentamiento, resaltar la pertenencia y problemática en el uso, la caracterización y el diseño de las tecnologías propias accionadas por sistemas de combustión. Para esto, se resume su fenomenología, sus definiciones, suposicionesy soluciones; se abordan algunos métodos numéricos utilizados para la solución de la ecuación de transferencia de radiación (Radiative TransferEquation (RTE)) y el acoplamiento de éstos a los códigos CFD (ComputationalFluids Dynamics); como también los tipos de equipos radiantes utilizados con mayor frecuencia, en especial los tubo radiantes; al igual que ciertas metodologíasexperimentales usadas para caracterizar los sistemas radiantes, y algunas metodologías de diseño. Se encontró, que el modelo del flux y el de transferencias discretas son pertinentes para darle solución al fenómeno con ayuda de los códigos CFD, como también, que el elemento de medición principalmente utilizado en las mediciones experimentales es el radiómetro; y que la metodología de diseño más práctica puede ser la optimización.

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Numerical and experimental investigation of a mild combustion burner

Cited by 178 publications

References 12 publications

Modeling Lifted Jet Flames in a Heated Coflow Using an Optimized Eddy Dissipation Concept Model

Modeling Lifted Jet Flames in a Heated Coflow Using an Optimized Eddy Dissipation Concept Model

Effect of Air-Fuel Ratio on Temperature Distribution and Pollutants for Biogas Mild Combustion

La radiación infrarroja como mecanismo de transferencia de calor de alta calidad en procesos de calentamiento

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