Detached Eddy Simulation of Turbulent Flow over a Partially Open Cavity

Syed, Shoeb Ahmed; Hoffmann, Klaus A.

doi:10.2514/6.2010-5072

Cited by 8 publications

(4 citation statements)

References 14 publications

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“…K is a function of Mach number and equals to 0.55 (Aradag [1]). The parameter α is related to cavity geometry and has a value of 0.25 (Syed [2]). U ∞ is free-stream velocity, M ∞ is the free-stream Mach number, St is the Strouhal number, and m is the mode number of the cavity.…”

Section: Methodsmentioning

confidence: 99%

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Investigation of the Effects of Length to Depth Ratio on Open Supersonic Cavities Using CFD and Proper Orthogonal Decomposition

Yılmaz

Ayli

Aradağ

2013

The Scientific World Journal

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Simulations of supersonic turbulent flow over an open rectangular cavity are performed to observe the effects of length to depth ratio (L/D) of the cavity on the flow structure. Two-dimensional compressible time-dependent Reynolds-averaged Navier-Stokes equations with k-ω turbulence model are solved. A reduced order modeling approach, Proper Orthogonal Decomposition (POD) method, is used to further analyze the flow. Results are obtained for cavities with several L/D ratios at a Mach number of 1.5. Mostly, sound pressure levels (SPL) are used for comparison. After a reduced order modeling approach, the number of modes necessary to represent the systems is observed for each case. The necessary minimum number of modes to define the system increases as the flow becomes more complex with the increase in the L/D ratio. This study provides a basis for the control of flow over supersonic open cavities by providing a reduced order model for flow control, and it also gives an insight to cavity flow physics by comparing several simulation results with different length to depth ratios.

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Section: Methodsmentioning

confidence: 99%

“…Due to the complexity of the flow mechanism in different cavity configurations, cavity flows are categorized based on mainly geometric specifications ( L / D ratio, L / W ratio), cavity flow phenomena, and Mach number as discussed by Syed [2]. Geometric specifications of the cavity region affect the flow propagation in the cavity.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Effects of Length to Depth Ratio on Open Supersonic Cavities Using CFD and Proper Orthogonal Decomposition

Yılmaz

Ayli

Aradağ

2013

The Scientific World Journal

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“…The model constant is taken as C des ¼ 0.61. 43 More details can be seen in ANSYS Fluent Documentation. 42…”

Section: Computational Approaches Desmentioning

confidence: 99%

Numerical simulation of the slipstream and aeroacoustic field around a high-speed train

Zhu

Hemida

Flynn

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part F:

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Where a licence is displayed above, please note the terms and conditions of the licence govern your use of this document. When citing, please reference the published version. Take down policy While the University of Birmingham exercises care and attention in making items available there are rare occasions when an item has been uploaded in error or has been deemed to be commercially or otherwise sensitive.

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“…Unlike the latter studies which focus on the flow physics, most of the former references adopted the turbulent flow over partially open cavity as a validation case for numerical approaches. Syed and Hoffmann [15] conducted detached eddy simulation for turbulent flow over a partially open cavity. Their work has mainly aimed at comparing three sub-grid scale turbulence models, namely the S-A, SST k-ω, and the realizable k-ε models.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of turbulent flow and heat transfer over partially open cavities: Effect of opening ratio

2017

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Partially open cavities are encountered in various engineering systems such as electronic cooling devices and cooling for gas turbine blades, instead of conventional film cooling slots. Flow is to be imparted over the partially open cavity where it induces a shear layer and a shear driven vortex within the cavity, which is subjected to cooling effect at its wall. Depending on the opening ratio, heat and mass transfer occur between the main flow and the trapped vortex through the shear layer. In the present study, RANS simulations of such flow have been conducted for circular and square cavities to investigate the effect of opening ratio on the heat and mass transfer characteristics. The simulations were established on a rigorous numerical approach and proper validation with laser Doppler velocimetry measurements of turbulent flow in circular cavity. Based on the hydraulic diameter of the cavity, opening ratios ranging from 0.2 to 1.0 were investigated for a Reynolds number of 3?105. Generally, the maximum Nusselt number was achieved at higher opening ratios for both circular and rectangle cavities. On the other hand, the maximum dimensionless temperature gradient, ?, inside the cavity was achieved at L/D = 0.2 for both cavity configurations.

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Detached Eddy Simulation of Turbulent Flow over a Partially Open Cavity

Cited by 8 publications

References 14 publications

Investigation of the Effects of Length to Depth Ratio on Open Supersonic Cavities Using CFD and Proper Orthogonal Decomposition

Investigation of the Effects of Length to Depth Ratio on Open Supersonic Cavities Using CFD and Proper Orthogonal Decomposition

Numerical simulation of the slipstream and aeroacoustic field around a high-speed train

Numerical investigation of turbulent flow and heat transfer over partially open cavities: Effect of opening ratio

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