Numerical Simulation of Transition due to Crossflow Instability

Meyer, F.; Kleiser, Leonhard

doi:10.1007/978-3-642-84103-3_57

Cited by 8 publications

(4 citation statements)

References 5 publications

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“…26 At the same time, calculations (see, e.g., Refs. 3,15,[27][28][29] predict that the swept-wing boundary layer is the most unstable to the traveling waves, i.e., to the unsteady cross-flow instability modes. The traveling modes are also observed experimentally under "natural" conditions, but usually when the free-stream turbulence is relatively high and/or the surface is relatively smooth.…”

Section: Articlementioning

confidence: 99%

Experimental and theoretical study of swept-wing boundary-layer instabilities. Unsteady crossflow instability

et al. 2019

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Extensive combined experimental and theoretical investigations of the linear evolution of unsteady (in general) Cross-Flow (CF) and threedimensional (3D) Tollmien-Schlichting (TS) instability modes of 3D boundary layers developing on a swept airfoil section have been carried out. CF-instability characteristics are investigated in detail at an angle of attack of −5 ○ when this kind of instability dominates in the laminarturbulent transition process, while the 3D TS-instability characteristics are studied at an angle of attack of +1.5 ○ when this kind of instability is predominant in the transition process. All experimental results are deeply processed and compared with results of calculations based on several theoretical approaches. For the first time, very good quantitative agreement of all measured and calculated stability characteristics of swept-wing boundary layers is achieved both for unsteady CF-and 3D TS-instability modes for the case of a boundary layer developing on a real swept airfoil. The first part of the present study (this paper) is devoted to the description of the case of CF-dominated transition, while the TS-dominated case will be described in detail in a subsequent second part of this investigation.

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Section: Articlementioning

confidence: 99%

Experimental and theoretical study of swept-wing boundary-layer instabilities. Unsteady crossflow instability

et al. 2019

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“…Reed & Lin (1987) and Lin & Reed (1993) performed DNS for stationary waves on an infinite-span swept wing similar to the ASU experiments. Meyer & Kleiser (1990) investigated the disturbance interactions between stationary and traveling crossflow modes on a swept flat plate using Falkner-Scan-Cooke similarity profiles for the basic state. The results are compared to the experiments by Müller & Bippes (1989).…”

Section: Cfd Comparisons (Dns)mentioning

confidence: 99%

STABILITY AND TRANSITION OF THREE-DIMENSIONAL BOUNDARY LAYERS

Saric

Reed

White

2003

Annu. Rev. Fluid Mech.

565

217

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“…Figure 10 presents level curves of G at t = 165.6 in a strongly accelerated Falkner-Skan-Cooke flow subject exclusively to crossflow instability. The flow conditions correspond to the boundary layer studied extensively at the German Aerospace Centre (DLR) described by Bippes (1999); in particular they correspond to those used in investigations via temporal direct simulation by Meyer (1989) and Meyer & Kleiser (1990): R θ = 374, m = 0.46 and φ = 46.9 • . The boundaries of the exponentially unstable regions are indicated by heavy lines.…”

Section: Optimal Sweepmentioning

confidence: 99%

Optimal linear growth in swept boundary layers

Corbett

Bottaro

2001

J. Fluid Mech.

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Optimal perturbations for the family of three-dimensional boundary layers described by the Falkner–Skan–Cooke similarity solution are obtained using a variational technique in the temporal framework. The disturbances experiencing the most growth take the form of vortices almost aligned with the external streamline at inception and evolve into streaks. In subcritical flows these can attain about twice the transient amplification observed in comparably forced two-dimensional flows. Possible connections between optimal perturbations and exponentially amplified crossflow vortices are explored.

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Numerical Simulation of Transition due to Crossflow Instability

Cited by 8 publications

References 5 publications

Experimental and theoretical study of swept-wing boundary-layer instabilities. Unsteady crossflow instability

Experimental and theoretical study of swept-wing boundary-layer instabilities. Unsteady crossflow instability

STABILITY AND TRANSITION OF THREE-DIMENSIONAL BOUNDARY LAYERS

Optimal linear growth in swept boundary layers

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