A Theoretical Investigation of the Interaction Between Shock Waves and Unseparated Boundary Layers in Transonic Flow PDF Download
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Author: Howard Michael Brilliant
Publisher:
ISBN:
Category : Aerodynamics, Transonic
Languages : en
Pages : 386
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Book Description
Author: Howard Michael Brilliant
Publisher:
ISBN:
Category : Aerodynamics, Transonic
Languages : en
Pages : 386
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Book Description
Author: Holger Babinsky
Publisher: Cambridge University Press
ISBN: 1139498649
Category : Technology & Engineering
Languages : en
Pages : 481
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Book Description
Shock wave-boundary-layer interaction (SBLI) is a fundamental phenomenon in gas dynamics that is observed in many practical situations, ranging from transonic aircraft wings to hypersonic vehicles and engines. SBLIs have the potential to pose serious problems in a flowfield; hence they often prove to be a critical - or even design limiting - issue for many aerospace applications. This is the first book devoted solely to a comprehensive, state-of-the-art explanation of this phenomenon. It includes a description of the basic fluid mechanics of SBLIs plus contributions from leading international experts who share their insight into their physics and the impact they have in practical flow situations. This book is for practitioners and graduate students in aerodynamics who wish to familiarize themselves with all aspects of SBLI flows. It is a valuable resource for specialists because it compiles experimental, computational and theoretical knowledge in one place.
Author: M. C. Alstatatt
Publisher:
ISBN:
Category : Aerodynamics, Transonic
Languages : en
Pages : 42
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Book Description
Two wind tunnel tests were conducted in a flow exhibiting a shock-wave/boundary-layer interaction of the type occurring on airfoils at transonic velocities. Boundary-layer pressure distributions were measured with pitot and static probes. Velocities in the free stream and in the boundary layer were obtained with a laser velocimeter (LV) system, and a data reduction program for the LV results was developed. Measurements from the pressure probes and from the LV system are compared with each other and with theoretical computations. It was found that the analytic models for boundary-layer velocity profile and Reynolds stress agree well with experimental measurements. (Author).
Author: Earl C. Watson
Publisher:
ISBN:
Category : Laminar boundary layer
Languages : en
Pages : 140
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Book Description
Laminar and turbulent boundary layer interactions with externally generated shock waves.
Author: Hans Wolfgang Liepmann
Publisher:
ISBN:
Category :
Languages : en
Pages : 637
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Book Description
Author: Fulvio Sartor
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
A transonic interaction between a shock wave and a turbulent boundary layer is experimentally and theoretically investigated. The configuration is a channel flow over a bump, where a shock wave causes the separation of the boundary layer and a recirculating bubble is observed downstream of the shock foot.The mean flow is experimentally investigated by means of PIV, then different techniques allows to identify the main unsteadiness of this shock-wave/boundary-layer interaction. As recognised in similar configurations, the flow presents two distinguished characteristic frequencies, whose origins are still unknown.Numerical simulations are performed solving RANS equations. Results are in good agreement with the experimental mean flow, but the approach fails to predict the unsteady. The solution of RANS equations is then considered as a base flow, and a global stability analysis is performed. Eigenvalue decomposition of the Navier-Stokes operator indicates that the interaction is stable, and the dynamics cannot be described by unstable global modes.A linearised approach based on a singular-value decomposition of the Resolvent is then proposed: the noise-amplifier behaviour of the flow is highlighted by the linearised approach. Medium-frequency perturbations are shown to be the most amplified in the mixing layer, whilst the shock wave behaves as a low-pass filter.The same approach is then applied to a transonic flow over a profile, where the flow can present high-amplitude shock oscillations. The stability analysis can describe both the buffet phenomenon when an unstable mode is present, and the convective instabilities responsible of medium-frequency unsteadiness.
Author: Doyle D. Knight
Publisher:
ISBN:
Category : Navier-Stokes equations
Languages : en
Pages : 80
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Book Description
Author: University of Michigan. Board of Regents
Publisher:
ISBN:
Category :
Languages : en
Pages : 1910
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Book Description
Author: International Union of Theoretical and Applied Mechanics
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 432
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Book Description
Author: Theodore A. Reyhner
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 206
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Book Description
