Computational Investigation of Turbulent Swirling Flows in Gas Turbine Combustors

Benim, Ali Cemal; Escudier, M. P.; Stopford, P. J.; Buchanan, E.; Syed, Khawar

doi:10.5293/ijfms.2008.1.1.001

Cited by 7 publications

(6 citation statements)

References 63 publications

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“…CFD simulations of the isothermal and the reacting flow in the DLE combustor have also been performed. Some of them were based on Reynolds-averaged Navier-Stokes (RANS) calculations [60,61] whereas in the more recent studies LES was used and different turbulence and combustion models were validated [62][63][64].…”

Section: Experimental Setup and Measurement Techniques 21 Burner Comb...mentioning

confidence: 99%

Experimental study of industrial gas turbine flames including quantification of pressure influence on flow field, fuel/air premixing and flame shape

Stopper

Meier

Sadanandan

et al. 2013

Combustion and Flame

106

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Section: Experimental Setup and Measurement Techniques 21 Burner Comb...mentioning

confidence: 99%

Experimental study of industrial gas turbine flames including quantification of pressure influence on flow field, fuel/air premixing and flame shape

Stopper

Meier

Sadanandan

et al. 2013

Combustion and Flame

106

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“…Second-order accurate discretisation schemes were found to produce non-physical oscillations and become unbounded when applied to the convection of the Reynolds stresses, even for unsteady simulations. Benim et al (2008) experienced similar issues and resorted to the firstorder upwind scheme, which produced results that were in close agreement with the experimental readings for a swirl combustor. Therefore, the first-order upwind scheme was selected for these terms, which was found to give satisfactory results.…”

Section: Boundary Conditionsmentioning

confidence: 54%

Modelling of vortex flow controls at high drainage flow rates

Jarman¹,

Butler

Tabor

et al. 2015

Proceedings of the Institution of Civil Engineers - Engineering

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A number of vortex flow control (VFC) devices for urban drainage systems are investigated computationally at high flow rates, for which a confined vortex dominates the flow regime. A range of turbulence models, including both eddy viscosity and Reynolds stress closures, are compared with in-house experimental measurements of head loss and internal pressure measurements. Single-phase and multi-phase (free surface) calculations are also compared. Very good agreement with the experimental data was obtained when the swirl parameter of the device was below 3 . 14 for predictions made using the Reynolds stress closure formulations. For devices with swirl parameters above this value, the computational methodology was found to under-predict the head loss of the device. This was attributed to poor calibration of the turbulence model for swirling flow scenarios in which the pressure gradient and diffusive (turbulent) forces in the flow are comparable.

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“…In computational analyses of fluid flow problems, methods based on discretizing the Navier-Stocks equations such as the Finite Volume Method (FVM), Finite Element Method (FEM), Finite Differences Method (FDM), etc. are widely used for research and computations (Feng et al 2006, Benim et al 2006. Almost all fluid flows in engineering applications are turbulent and contain a wide spectrum of different scales of vortices of particles.…”

Section: Theoretical Perceptionsmentioning

confidence: 99%

The Impact of Air Fences Geometry on Air Flow around an ICE3 High Speed Train on a Double Line Railway Track with Exposure to Crosswinds

Mohebbi

Rezvani

2018

JAFM

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Reduction in weight adjoined with the increase in the railway vehicle speed of travel added to the deteriorating effects of the crosswinds on the running behavior of high speed trains. During the past decade, many researchers have concentrated on examining the aerodynamic force and moment coefficients for the trains. Varieties of studies regarding the effects of crosswinds on the trains are accomplished. However, the need to restrain strong winds from disturbing trains running safety is not completed. This research is concerned with finding a proper solution for attenuating the worrying effects of the winds that hit the trains. Installation of air fences on the sides of the railway tracks is investigated. To serve the purpose, a variety of air fences with different heights, with and without the edges on top of the fences, at a variety of the edge lengths and angles are studied. The study covers double routed railway track while the air fences are installed on either side of the track. The train can be on the leeward or windward line. The problem solving is based on the Lattice-Boltzmann method. This research pioneers in using this method for the said purpose. It is found that by inserting the fences and increasing their heights for up to 1m, the drag forces decrease to 40 percent and the rolling moment coefficients decrease to 15 percent. The presence of the edge can also decrease the drag force for about 55 to 120 percent and decrease the rolling moment coefficients for about 30 to 115 percent in some cases. Variations in percentages of reduction are due to the different angles and the lengths of the edges.

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Computational Investigation of Turbulent Swirling Flows in Gas Turbine Combustors

Cited by 7 publications

References 63 publications

Experimental study of industrial gas turbine flames including quantification of pressure influence on flow field, fuel/air premixing and flame shape

Experimental study of industrial gas turbine flames including quantification of pressure influence on flow field, fuel/air premixing and flame shape

Modelling of vortex flow controls at high drainage flow rates

The Impact of Air Fences Geometry on Air Flow around an ICE3 High Speed Train on a Double Line Railway Track with Exposure to Crosswinds

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