Numerical Modelling of Turbulent Flow in a Combustion Tunnel

Ghoniem, A. F.; Chorin, Alexandre J.; Oppenheim, A. K.

doi:10.1016/b978-0-12-174070-2.50016-2

Cited by 4 publications

(4 citation statements)

References 12 publications

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“…The importance of this flow has resulted in numerous calculations to predict the instantaneous and time-averaged behavior (Gasman et al 1979;Castro 1979;Ashurst 1979; * Presently at: Laboratory for Computational Physics and Fluid Dynamics, Mail Code 4410, Naval Research Laboratory, Washington, DC 20375, USA Ghoniem et al 1982). An accurate prediction of the flow field is useful in understanding the fluid dynamic processes and can be used to test new design concepts.…”

Section: Introductionmentioning

confidence: 99%

The effect of aspect ratio on the flow over a rearward-facing step

Berbee

Ellzey

1989

Experiments in Fluids

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In this study, we investigate the effect of the spanwise width on the mixing layer behind a rearward-facing step. Results for aspect ratios (tunnel width/step height) of I0 and 4 and Reynolds numbers of 11,000 and 5,000 are presented. A frequency shifted, single component LDV system was used to obtain mean streamwise velocity profiles, turbulence intensity profiles, and normal velocity spectra at four streamwise and three spanwise positions for each test case. The mean velocity and turbulence intensity profiles are constant across the width of the test section for either of the Reynolds numbers considered, but there are significant differences among the cases studied. At a distance greater than three step heights downstream of the step, the peak turbulence intensity is greater for higher aspect ratio and is relatively insensitive to Reynolds number. The peak frequency is lower and the spectrum is narrower for a higher aspect ratio in the region near the step.

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Section: Introductionmentioning

confidence: 99%

The effect of aspect ratio on the flow over a rearward-facing step

Berbee

Ellzey

1989

Experiments in Fluids

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“…The motion of a flame in a two dimensional region under the influence of turbulence was modelled using the SLIC technique [11] to approximate the configuration of the fluid interface. Similar applications of the thin flame technique have been made by Sethian [13] and Ghoniem, Chorin and Oppenheim [5] as a powerful means of accurately modelling reacting turbulent flow.…”

Section: The Thin Flame Techniquementioning

confidence: 71%

“…In order to move our grid we apply a transformation e = X -vt .... (5) to the equations, where vis the flame velocity. The flame velocity is not yet known and will be determined by the shooting method from the set of steady state equations that result from thee= X -vt transformation.…”

Section: Oxygen Mass Balancementioning

confidence: 99%

The Thin Flame Technique for In-Situ Combustion Simulation

Davies¹

1989

Proceedings of SPE Annual Technical Conference and Exhibition

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This paper describes an approach taken to overcome the problems caused by grid block size effects in field scale insitu combustion simulations. A new method called the thin flame technique is presented which approaches the problem by decoupling the flame from the conventional finite difference simulator and ·solving seperately for the flame speed and reaction rate. The thin flame technique uses the flame speed and reaction rate to advance a thin boundary representing the flame through the grid. This boundary acts as a moving heat source and displacing pump.

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“…As a result, the majority of studies reported in the literature considers the reaction and transport of species within the liquid inside the porous underground reservoir [15][16][17]. Moreover, similar Lagrangian methods are developed and employed to simulate turbulent flows and solve the reaction-diffusion equations for propagating laminar flames [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%