Development and Application of Transition Prediction Techniques in an Unstructured CFD Code (Invited)

Krumbein, Andreas; Krimmelbein, Normann; Grabe, Cornelia; Shengyang, Nie

doi:10.2514/6.2015-2476

Cited by 13 publications

(8 citation statements)

References 115 publications

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“…For streamwise instabilities, a certain frequency and a fixed wave orientation are set; and an initial wavelength is provided that is allowed to change along the integration path. This essentially assumes that the most amplified mode is perfectly aligned with the integration path, which is not necessarily the case, but the variation of the N factor around this direction was found to be small for the conditions under consideration in this work [29]. Additionally, no problems with pathological cases were encountered in the analyzed cases as described by Arnal [30].…”

Section: Transition Predictionmentioning

confidence: 76%

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Automatic Transition Prediction in a Navier–Stokes Solver Using Linear Stability Theory

Fischer¹,

Soemarwoto²,

Weide

2021

AIAA Journal

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Section: Transition Predictionmentioning

confidence: 76%

“…Additionally, no problems with pathological cases were encountered in the analyzed cases as described by Arnal [30]. For crossflow instabilities, a fixed wavelength is prescribed with a zero frequency, resulting in a stationary crossflow wave [21,29]. The wave orientation is varied along the path to find the most unstable mode.…”

Section: Transition Predictionmentioning

confidence: 99%

Automatic Transition Prediction in a Navier–Stokes Solver Using Linear Stability Theory

Fischer¹,

Soemarwoto²,

Weide

2021

AIAA Journal

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“…Laminar-türbülans geçiş olayını tahmin etmek üzere matematiksel modeller üzerinde sayısız çalışma mevcuttur. Bu çalışmaların etütlerinin yapıldığı derleme makalelerinde [8][9][10] geçiş modellerinin yaklaşımları hakkında bilgiler verilmiştir. Bu modeller arasında Menter vd.…”

Section: Introductionunclassified

Effect of Turbulence Intensity on Transition Location Estimation Using Local Correlation Transition Model

ATİK

2022

DÜMF MD

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Aerodynamic parameters are among the most important parameters in flight performance analyses of air/sea vehicles. Free stream turbulence intensity has significant importance on aerodynamic parameters obtained with computational fluid dynamic analyses and wind tunnel tests measurements. In this study, the effect of free stream turbulence intensity on the transition locations of spheroid geometry using with the widely accepted local correlation transition model. The computations are performed at 6.5 x 106 Reynolds number with 0 and 5 degree angle of attacks. The computations at 5 degree angle of attack are compared with an available experimental study. The effect of free stream turbulence intensity is investigated with axial force coefficient, normal force coefficient, and surface friction coefficient distributions. It is seen that axial and normal force coefficients increase with increasing free stream turbulence intensity. The differences in force coefficients obtained with the free stream intensity range used in the study shall create noteworthy effects in flight performance analyses. When surface friction coefficients are investigated, the transition model estimates the transition locations earlier while free stream turbulence intensity increases as expected. However, the transition front geometry is obtained significantly different with respect to the experimental results.

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“…Also no extra coupling to another solver is required such that parallelization problems and issues with complex geometries can be avoided [115]. Other examples of direct access to RANS boundary layer information include [148,16,21,96,78]. are sufficient [103].…”

Section: Direct Access From Rans Solutionmentioning

confidence: 99%

“…Additionally, limiting the design space by reducing the number of span-wise nodes is a concern. 200-400 span-wise sections are used in literature depending on the specific application [78,81,77].…”

Section: Direct Access From Rans Solutionmentioning

confidence: 99%

Laminar wing design: A framework for transition delay using linear stability theory and adjoint optimization

Fischer

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Development and Application of Transition Prediction Techniques in an Unstructured CFD Code (Invited)

Cited by 13 publications

References 115 publications

Automatic Transition Prediction in a Navier–Stokes Solver Using Linear Stability Theory

Automatic Transition Prediction in a Navier–Stokes Solver Using Linear Stability Theory

Effect of Turbulence Intensity on Transition Location Estimation Using Local Correlation Transition Model

Laminar wing design: A framework for transition delay using linear stability theory and adjoint optimization

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