Prediction of Separation-Induced Transition on the SD7003 Airfoil Using Algebraic Transition Triggering

Bernardos, Luis; Richez, François; Gleize, Vincent; Gerolymos, G. A.

doi:10.2514/1.j058288

Cited by 16 publications

(12 citation statements)

References 66 publications

(174 reference statements)

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“…The authors have noted that the computed Menter et al intermittency function at the wall γ w [18] and the Bernardos et al transition function f tr [13] exhibit interesting similar qualitative behaviors, as shown in Fig. 2.…”

Section: Proposed Model and Transition Detection Criterionmentioning

confidence: 61%

“…They obtained a correct estimation of the bubble length, but the minimum of the C f and the pressure recovery in the reattachment region were strongly underestimated. Bernardos et al proposed the LSTT κ − ω model based on a function f tr that boosted the production of the turbulent kinetic energy κ inside the bubble [13]. Excellent results were achieved.…”

Section: Proposed Model and Transition Detection Criterionmentioning

confidence: 99%

“…The evidenced problem of the low turbulence level in the reattached region was addressed by Bernardos et al [13]. The adoption of a proper triggering function for the production of kinetic energy in the bubble significantly improved the accuracy.…”

mentioning

confidence: 99%

“…A model that tries to solve these two critical aspects is proposed in this paper. The κ − ω − γ SST model [6] is used in conjunction with the laminar separation transition triggering (LSTT) κ − ω model [13]. The γ intermittency function is employed for the transition detection, whereas (following Bernardos et al [13]) a function is adopted to enhance the production of the turbulent kinetic energy within the LSB.…”

mentioning

confidence: 99%

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Model for Enhancing Turbulent Production in Laminar Separation Bubbles

2021

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Laminar separation bubbles are one of the main critical aspects of flows at low Reynolds numbers in the range of 10 4 -10 5 . The flow separates in the laminar regime, the turbulence developing inside the recirculation region enhances the momentum transport, and the flow can reattach. Models based on the Reynolds-averaged Navier-Stokes equations suffer two of main issues: the determination of the transition onset and the level of the pressure recovery downstream of the reattachment of the flow. A model addressing both issues is presented in this paper. It is based on the γ transition model for the transition detection. The production of the turbulent kinetic energy κ has been properly enhanced thanks to a correlation found between the necessary boosting of κ and the intermittency function behavior within the bubble. The low-Mach-number and Reynolds-number flows around the Selig-Donovan 7003, Eppler 387, and NACA 0015 airfoils are analyzed. The results are compared to experimental data and large-eddy simulations available in the literature. The model can be applied to the analysis of an arbitrary airfoil without need of preliminary calculation of the transition point within the bubble.

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Section: Proposed Model and Transition Detection Criterionmentioning

confidence: 61%

Section: Proposed Model and Transition Detection Criterionmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Model for Enhancing Turbulent Production in Laminar Separation Bubbles

2021

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“…The simulation result obtained from LES-WALE simulation for unexcited airfoil was compared against the XFoil result with critical amplification factor N cr = 5. With XFoil, the transition to turbulent flow was predicted through e N method, and this N cr corresponds to turbulence intensity (Tu) of 0.371% through the relationship N cr = −8.43−2.4 * ln(Tu%/100%) [23].…”

Section: Validation Of Results For Unexcited Airfoilmentioning

confidence: 99%

Modal Reduction of Synthetic Jet Actuator Based Separation Control With Spectral POD

Shi

Sullivan

2020

Preprint

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A synthetic jet actuator (SJA) is a zero-net-mass-flux device that imparts fluid momentum and is useful for active flow control (AFC). In many applications, airfoil performance is often limited or degraded by flow separation which is usually associated with loss of lift, increased drag, and kinetic energy losses. Therefore, it is of interest to investigate methods of separation region suppression with the forcing control of SJA. This paper studies the flow behavior of cross flow over an airfoil and how the addition of SJA influences flow characteristics. Using the Spectral Proper Orthogonal Decomposition and LES simulation, flow instabilities in the wake region are analyzed in their different temporal and spatial scales. The objective of this study is to explore the viability of SPOD for separation control and correlating the decomposed flow modes to the aerodynamic performance of airfoil.

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Large Eddy Simulation of the Transitional Flow Around the SD7003 Airfoil and Application to Blade–Vortex Interaction

Bresciani

Abbà

2020

Aerotec. Missili Spaz.

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Prediction of Separation-Induced Transition on the SD7003 Airfoil Using Algebraic Transition Triggering

Cited by 16 publications

References 66 publications

Model for Enhancing Turbulent Production in Laminar Separation Bubbles

Model for Enhancing Turbulent Production in Laminar Separation Bubbles

Modal Reduction of Synthetic Jet Actuator Based Separation Control With Spectral POD

Large Eddy Simulation of the Transitional Flow Around the SD7003 Airfoil and Application to Blade–Vortex Interaction

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