Multidisciplinary applications of detached-eddy simulation to separated flows at high Reynolds numbers

Morton, Scott A.; Steenman, M.; Cummings, Russell M.; Forsythe, James R.; Wurtzler, Kenneth E.; Squires, Kyle D.; Woodson, Shawn H.; Spalart, Philippe R.

doi:10.1109/dodugc.2003.1253383

Cited by 2 publications

(2 citation statements)

References 12 publications

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“…Beyond validation, the PSD analysis can also be used to aid in quantifying the mesh convergence and/or independence. Some researchers have suggested the evaluation of one or more arbitrary points in the flow to see if the turbulence conforms to the Kolmogorov 5/3 turbulence power law, as a measure of mesh independence (52) . However, this measure of turbulence may not be useful for every case, as it may not be necessary to resolve all of the scales of turbulence to achieve convergence of integrated properties.…”

Section: Quantitative Analysis Of Cfd/csd Predictionsmentioning

confidence: 99%

Towards certification of computational fluid dynamics as numerical experiments for rotorcraft applications

2017

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Virtual Engineering (VE), also known as Model-Based Systems Engineering (MBSE), is necessary in both current operational engineering qualifications and to help reduce the costs of future vertical lift design and analysis. As computational power continues to provide increasing capability to the rotorcraft engineering community to perform simulations in both real time and off line, it is imperative that the community develop verification and validation protocols and processes to certify these methods so that they can be reliably used to help reduce engineering cost and schedule. Computational Fluid Dynamics (CFD) has become a major Computational Science and Engineering (CSE) tool in the fixed wing and vertical lift communities, but it has not been developed to the point where it is accepted as a replacement for testing in certification of new or existing systems or vehicles. Since the rise of modern CFD in the 1980s, the promise of CFD’s capabilities has been met or exceeded, but its role in certification arguably remains less prominent than projected. The ability to implement transformative technologies further drives the need for CFD in design. To meet CFD’s role in certification, several goals must be met to provide a true “numerical experiment” from which accuracies (error estimates), sensitivities, and consistent application results can be extracted. This paper discusses the progress and direction towards developing CFD strategies for certification.

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Section: Quantitative Analysis Of Cfd/csd Predictionsmentioning

confidence: 99%

Towards certification of computational fluid dynamics as numerical experiments for rotorcraft applications

2017

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“…In particular, Detached-eddy simulation (DES) method uses the RANS approach in attached boundary layers and the LES mode in separated flows. Since its first formulation based on SA model [24], DES has been validated on various geometries and flow conditions including circular or square cylinder [26], delta wing [6], airplane configuration [16], and the turbulent wake [1]. New formulations have been introduced to include other turbulence models such as k-ω SST [28] and LL k-ε [4], and modifications have been made to improve the performance of the model at ambiguous grid spacing and low Reynolds numbers [23].…”

Section: Introductionmentioning

confidence: 99%

Detached-Eddy Simulation of a Wing Tip Vortex at Dynamic Stall Conditions

Mohamed

Nadarajah

Paraschivoiu

2009

Journal of Aircraft

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The behavior of the tip-vortex behind a square NACA0015 wing was numerically investigated. The problems studied include the stationary and the oscillating wing at static and dynamic stall conditions. Reynolds-averaged Navier-Stokes (RANS) and detached-eddy simulation (DES) schemes were implemented. Vortex structures predicted by RANS were mainly diffused while DES was able to produce qualitatively and quantitatively better results as compared to the experimental data. The break-up of the tip vortex, which started at the end of the upstroke and continued to the middle of the downstroke over an oscillation cycle, was observed in DES data.

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Multidisciplinary applications of detached-eddy simulation to separated flows at high Reynolds numbers

Abstract: This work focuses on multidisciplinary applications of Detached-Eddy Simulation (DES),

Cited by 2 publications

References 12 publications

Towards certification of computational fluid dynamics as numerical experiments for rotorcraft applications

Towards certification of computational fluid dynamics as numerical experiments for rotorcraft applications

Detached-Eddy Simulation of a Wing Tip Vortex at Dynamic Stall Conditions

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