Large-Eddy Simulation of Pollutant Emission in a DOE-HAT Combustor

Eggenspieler, Gilles; Menon, Suresh

doi:10.2514/1.11427

Cited by 29 publications

(9 citation statements)

References 17 publications

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“…Shinjo et al [545] and Sengissen et al [543] studied the secondary fuel injection and fuel modulation on unsteady combustion behavior in swirl-stabilized combustors, respectively. Pollutant emissions and temperature profile in swirl combustors were also predicted by Cannon et al [519], Eggenspieler and Menon [525], Schmitt et al [542], and Boudier et al [544].…”

Section: Les Of Premixed Combustion Dynamics In Gas Turbine Enginesmentioning

confidence: 77%

Dynamics and stability of lean-premixed swirl-stabilized combustion

Huang

Yang

2009

Progress in Energy and Combustion Science

1,123

459

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Section: Les Of Premixed Combustion Dynamics In Gas Turbine Enginesmentioning

confidence: 77%

Dynamics and stability of lean-premixed swirl-stabilized combustion

Huang

Yang

2009

Progress in Energy and Combustion Science

1,123

459

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“…Nogenmyr et al [13] Yes Yes PLIF, PIV, 1 atm, no preheat, unconfined Roux et al [14] ----LDV, 1 atm, no preheat, confined Ji and Gore [15] Yes No PIV, 1 atm, no preheat Lee et al [16] No Yes PLIF, 2.6 atm, preheat LP (i.e., gaseous fuel) computations Eggenspieler and Menon [25] Yes Yes LES G-Eqn flamelet chemistry Kim et al [26] Yes Yes LES G-Eqn flamelet chemistry Huang and Yang [27,28], Huang et al [29], and Wang et al [ zone generated by the LPP injector in our facility, which is described in the next section. Previous work is listed in Table 1, which is separated into LPP (i.e., liquid fuel) and LP (i.e., gaseous fuel) studies.…”

Section: Concept Of Lean Premixed Prevaporized Combustionmentioning

confidence: 99%

Unsteady Aspects of Lean Premixed Prevaporized Gas Turbine Combustors: Flame-Flame Interactions

Dhanuka

Temme

Driscoll

2011

Journal of Propulsion and Power

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This work quantifies several sources of unsteadiness that exist within a lean premixed prevaporized gas turbine combustor that was operated at elevated pressures using Jet-A fuel. Flame-flame interactions and shear layer vortex shedding, which can be sources of combustion instabilities, are quantified with particle image velocimetry and planar laser-induced fluorescence diagnostics. Flame-flame interactions occur because lean premixed prevaporized aircraft combustors employ a premixed main flame, which is anchored by the nonpremixed pilot flame. The measured degree of unsteadiness is the standard deviation of flame surface density, flame length, vorticity in shear layer, and recirculation zone size. The flame surface density profile was broad, indicating that large flame motions occur. Flame length increases nonlinearly with fuel flow rate. Intense vortices in the shear layer are more than twice the average vorticity, indicating the need for unsteady modeling. Chamber pressure and liquid fuel flow rates were varied. Velocity fields for the five reacting cases were similar, but they differed from the two nonreacting cases. Heat release causes the recirculation zone shape to change from ellipsoidal (for the reacting cases) to toroidal (for the nonreacting cases). Methods were developed to image Jet-A spray flames at 3 atm using formaldehyde fluorescence.

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“…We assessed the large-eddy simulation (LES) using the flamelet approach to investigate its effectiveness to predict the flame dynamics and found it was a useful tool to predict turbulent combustion phenomena (1) . LES is a method based on spatial averaging turbulence modeling which has the advantage of using conventional time averaging methods to treat unsteady turbulence phenomena.…”

Section: Introductionmentioning

confidence: 99%

“…Taniguchi et al (5) have been investigating the validity of LES of premixed and non-premixed flames in turbulent combustion and haveapplied the findings to practical burners such as jet flames (6) and the swirl flames (7) . Eggenspieler and Menon (1) tried to simulate lean premixed turbulence combustion, which has uneven fuel concentration by using a combination of the G-equation and the mixture fraction equation. A few LES studies have been made of practical combustors as well (8) .…”

Section: Introductionmentioning

confidence: 99%

A Level Set Approach for a Premixed Flame Based on a New Concept of Flame Speed

Liu

Oshima

2011

JTST

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In this paper we propose a new level set approach to describe not only a flame's surface but also to the flame's spatial distribution. First, we derived the mathematical formulation for a one-dimensional laminar premixed flame, where the steady flame has a finite thickness depending on the diffusion flux whose physical quantity such as temperature has a relation to index function G . Further, to investigate the relationship between the present model and Inage's model, we extracted the physical meaning from the energy equation. We also validated another important parameter, the heat reaction release rate using the modified G-equation. The analysis of the heat release term leads to the definition of local flame speed, describing the distribution in the flame thickness. We evaluated the distribution of local flame speed with scalar G based on the one-dimensional solutions of premixed flames obtained by the detailed chemical reaction GRI-Mech3.0 using CHEMKIN. For 4 CH /Air premixed fuel, we carried out a series of calculations with different fuel rates and inlet temperatures. Based on the linear distribution of local flame speed, the modified G-equation can again be certified as the hyperbolic tangent profile.

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Large-Eddy Simulation of Pollutant Emission in a DOE-HAT Combustor

Cited by 29 publications

References 17 publications

Dynamics and stability of lean-premixed swirl-stabilized combustion

Dynamics and stability of lean-premixed swirl-stabilized combustion

Unsteady Aspects of Lean Premixed Prevaporized Gas Turbine Combustors: Flame-Flame Interactions

A Level Set Approach for a Premixed Flame Based on a New Concept of Flame Speed

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