Numerical investigation of turbulent swirling flames with validation in a gas turbine model combustor

Benim, Ali Cemal; Iqbal, Saman; Meier, Wolfgang; Joos, Franz; Wiedermann, Alexander

doi:10.1016/j.applthermaleng.2016.08.143

Cited by 47 publications

(21 citation statements)

References 16 publications

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“…For the construction of the beta functions, modeled transport equations are solved for mean values ( Z, C) and variances ( Z 2 , C 2 ) of Z, C [56,66,67]. The source term of the modeled C equation is extracted from the one-dimensional laminar flame data like any other thermochemical variable.…”

Section: Flamelet Generated Manifold (Fgm)mentioning

confidence: 99%

Comparison of Combustion Models for Lifted Hydrogen Flames within RANS Framework

Benim

Pfeiffelmann

2019

Energies

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Within the framework of a Reynolds averaged numerical simulation (RANS) methodology for modeling turbulence, a comparative numerical study of turbulent lifted H 2 /N 2 flames is presented. Three different turbulent combustion models, namely, the eddy dissipation model (EDM), the eddy dissipation concept (EDC), and the composition probability density function (PDF) transport model, are considered in the analysis. A wide range of global and detailed combustion reaction mechanisms are investigated. As turbulence model, the Standard k-ε model is used, which delivered a comparatively good accuracy within an initial validation study, performed for a non-reacting H 2 /N 2 jet. The predictions for the lifted H 2 /N 2 flame are compared with the published measurements of other authors, and the relative performance of the turbulent combustion models and combustion reaction mechanisms are assessed. The flame lift-off height is taken as the measure of prediction quality. The results show that the latter depends remarkably on the reaction mechanism and the turbulent combustion model applied. It is observed that a substantially better prediction quality for the whole range of experimentally observed lift-off heights is provided by the PDF model, when applied in combination with a detailed reaction mechanism dedicated for hydrogen combustion.

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Section: Flamelet Generated Manifold (Fgm)mentioning

confidence: 99%

Comparison of Combustion Models for Lifted Hydrogen Flames within RANS Framework

Benim

Pfeiffelmann

2019

Energies

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“…Jourdaine et al [26], investigated premixed swirling flames of CO 2 -CH 4 -O 2 and CH 4 -air using different optical diagnostics. Benim et al [27] studied numerically turbulent swirling flames in a model gas turbine combustor, using OpenFOAM code through the LES approach. Elbaz and Robert [16] investigated non-premixed methane swirling flames and particularly the quarl geometry effect on the flame structure.…”

Section: Swirl Effects On Flamesmentioning

confidence: 99%

Introductory Chapter: Swirling Flows and Flames

Boushaki¹

2019

Swirling Flows and Flames

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Swirling flows are used in a very wide range of industrial applications. In non-reacting cases, examples of applications include vortex amplifiers and reactors, heat exchangers, jet pumps, cyclone separators, whirlpools, tornadoes, etc. In reacting cases, swirlers are widely used in combustion systems, such as gas turbines, industrial furnaces, boilers, gasoline and diesel engines and many other practical heating devices. Effects of using swirl on flow and combustion are significant and various and concern, for example, aerodynamics, mixing, flame stability, intensity of combustion and pollutant emissions. In this chapter, we are interested in the use of swirling flows in combustion systems. In industrial plants, the geometric methods of flame stabilization are based on increasing the residence time of reactive gases either by the wake effect bluff-body burner, by the flow rotation of reactants swirl burner or by a combination of these two mechanisms. Burners with helical flows generally referred to as the swirl burner have very wide applications in the industrial field. In the literature, many examples of uses of swirling jets are found as a means of controlling combustion [1-4]. Other studies focused on the swirl effect on the characteristics of lifted flames [5], stabilization and blow-out phenomenon [6-8] and pollutant emissions [9-13]. 2. Swirl generation techniques There are several ways to generate the rotation of a flow. They can be classified into three main categories:

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“…Fossil fuels have been and are still being used as the major primary energy source for generation heat and of power [1][2][3]. For fossil fuels, the combustion process has been utilized for the conversion [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Analysis of combustion, heat and fluid flow in a biomass furnace

et al. 2019

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A waste wood burning boiler with 200kW thermal power is investigated by experiments and numerically. Temperature measurements are performed in the furnace and in the heat exchanger sectionsin the downstream. Exit exhaust gas composition is also measured. Flow, heat transfer and combustion in the furnace, and forced convection on the water side are numerically analyzed. The water side calculations are used to obtain boundary conditions for the furnace by heat transfer coefficients. For validating the adopted mathematical/numerical formulation, the predictions are compared with measurements.A satisfactory agreement between the predictions and measurements is observed, confirming the validity of the applied computational procedures.

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Numerical investigation of turbulent swirling flames with validation in a gas turbine model combustor

Cited by 47 publications

References 16 publications

Comparison of Combustion Models for Lifted Hydrogen Flames within RANS Framework

Comparison of Combustion Models for Lifted Hydrogen Flames within RANS Framework

Introductory Chapter: Swirling Flows and Flames

Analysis of combustion, heat and fluid flow in a biomass furnace

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