Calculation of the flow field and NO x emissions of a gas turbine combustor by a coarse computational fluid dynamics model

Gobbato, Paolo; Masi, Massimo; Toffolo, Andrea; Lazzaretto, Andrea; Tanzini, G.

doi:10.1016/j.energy.2011.12.013

Cited by 26 publications

(13 citation statements)

References 20 publications

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“…The frequency response function, H, is the flame transfer function defined in the left-hand-side of Eqs. (1) and (2). To calculate the flame transfer function, an appropriate length of the hot-wire and PMT signals was first selected.…”

Section: Post Processing Of the Experimental Datamentioning

confidence: 99%

“…Intensive research activities are, therefore, being carried out across the world to mitigate the environmental issues associated with the combustion of various fuels [1]. In particular, significant attention has been paid to the reduction of combustion generated air pollutants [2]. To comply with the strict air pollution standards, gas turbines must have minimal NOx emission [2,3].…”

Section: Introductionmentioning

confidence: 99%

“…In particular, significant attention has been paid to the reduction of combustion generated air pollutants [2]. To comply with the strict air pollution standards, gas turbines must have minimal NOx emission [2,3]. As a result, the gas turbine industry is moving towards utilisation of lean premixed flames to reduce NOx formation [4].…”

Section: Introductionmentioning

confidence: 99%

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Response of a conical, laminar premixed flame to low amplitude acoustic forcing – A comparison between experiment and kinematic theories

Karimi

2014

Energy

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This paper presents an experimental study on the dynamics of a ducted, conical, laminar premixed flame subjected to low amplitude acoustic excitation from upstream. The heat release response of the flame to velocity disturbances is investigated through measurement of the so called 'flame transfer function' for a wide range of forcing frequencies. The results are compared with those predicted by the existing linear kinematic theories. It is observed that these theories are in general agreement with the experiment, although there exist some disparities. A detailed comparison of the experimental data with the kinematic theories shows that the phase speed of flame disturbances has an essential influence upon the level of agreement between the theory and experiment. The data set presented in this work complements that reported in an earlier study. In keeping with others, visualisation of the excited flames clearly shows that the flame response includes waves on the flame front which are formed at the base and then convect along the flame.

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Section: Post Processing Of the Experimental Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Response of a conical, laminar premixed flame to low amplitude acoustic forcing – A comparison between experiment and kinematic theories

Karimi

2014

Energy

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“…Central recirculation zone plays an important role in flame stabilization as it can return part of burned gas to the outlet of swirler to reduce the flow velocity of air at the outlet of swirler to local flame propagation speed, meanwhile its position and size directly affects the residence time of liquid fuel vapors, which has a great influence on the generation of NO x . [2][3][4] Consequently, the swirler directly affects combustor performance. In this paper, the cold flow field downstream of a swirler was experimentally investigated using the particle image velocimetry (PIV) technique to provide reference data and elucidate the impact of boundary conditions on the behavior exhibited by a given swirler design.…”

Section: Introductionmentioning

confidence: 99%

Effect of boundary conditions on downstream vorticity from counter-rotating swirlers

Huo

Lin

Zhang

et al. 2015

Chinese Journal of Aeronautics

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Particle image velocimetry (PIV) is utilized to measure the non-reacting flow field in a reflow combustor with multiple and single swirlers. The velocity field, vortex structure and total vorticity levels are experimentally obtained using two different boundary conditions, representing a single confined swirler and multiple swirlers in an annular combustor. The influence of the boundary conditions on the flow field at several locations downstream of the swirlers is experimentally investigated, showing that the central vortex in the multi-swirler case is more concentrated than in the single-swirler case. The vorticity of the central vortex and average cross-sectional vorticity are relatively low at the swirler outlet in both cases. Both of these statistics gradually increase to the maximum values near 20 mm downstream of the swirler outlet, and subsequently decrease. It is also found that the central vortex in the multi-swirler case is consistently greater than the single-swirler case. These results demonstrate the critical influence of boundary conditions on flow characteristic of swirling flow, providing insight into the difference of the experiments on testbed combustor and the full-scale annular combustors. ª 2015 Production and hosting by Elsevier Ltd. on behalf of CSAA & BUAA.

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“…As powerful computing technologies are continuously and rapidly improved, the feasibility of using CFD analyses is undoubted for combustor design. Many researchers [1][2][3][4][5][6][7][8][9][10][11] employed different model and CFD methods using commercial code to capture the axial, swirl flow and combustion flams. The research [18][19][20][21][22][23][24] using CFD analysis to study the reacting flow within the combustor tube, Crocker et al [18] conducted a numerical analysis of an entire combustor domain, including the fuel nozzle, dome, inner and outer diffuser passages, and the dilution holes.…”

Section: Introductionmentioning

confidence: 99%

CFD Study of Cooled Flow in Annular Combustor of Aircraft-Engine

2017

Sept. 8-10, 2017 Istanbul (Turkey) ESTIA-2017, HEFBS-2017, UTAEE-17, BLECSR-17 &Amp; LEHSS-17

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Calculation of the flow field and NO x emissions of a gas turbine combustor by a coarse computational fluid dynamics model

Cited by 26 publications

References 20 publications

Response of a conical, laminar premixed flame to low amplitude acoustic forcing – A comparison between experiment and kinematic theories

Response of a conical, laminar premixed flame to low amplitude acoustic forcing – A comparison between experiment and kinematic theories

Effect of boundary conditions on downstream vorticity from counter-rotating swirlers

CFD Study of Cooled Flow in Annular Combustor of Aircraft-Engine

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