Titlebook: Instabilities and Turbulence in Engineering Flows; D. E. Ashpis,T. B. Gatski,R. Hirsh Book 1993 Springer Science+Business Media Dordrecht

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Bypass-Transition Research: Issues and Philosophyquasi-homogeneous in the streamwise .- and spanwise .-directions. A primary instability brings about a quasi-periodic vorticity structure in one spatial direction. At least one secondary instability of the (near) saturated primary vortical structures must then take place to prepare the stage for the

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The Generation of Disturbances in a Boundary Layer by Wall Perturbations: The Vibrating Ribbon Revisvalue problem models the flow created by a vibrating ribbon exciter originally employed by Schubauer & Skramtad in their historic experiment that demonstrated the existence of Tollmien-Schlichting waves. It will be shown here how the ensuing oscillatory motion in the flow can be split into two compo

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An Asymptotic-Numerical Method for the Orr-Sommerfeld Equation1,1), and on applying the associated Gaussian quadrature to the numerical solution of the Orr-Sommerfeld equation. Two nonlinear recurrence relations are derived for computing the coefficients .. and .. of the associated linear, three-term recurrence satisfied by the orthonormal polynomials, ..(.) o

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Dynamic Modelling of Axial Flow Compression Systemsh develop is of interest to both the engine designer and the designer of an engine control system. The lumped parameter model which has been developed by Moore and Greitzer has been shown to capture the essential physics of the problem. Applying bifurcation theory to a single-harmonic version of thi

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Stability of the Inviscid Shock Layer in Strong Interaction Flow Over a Hypersonic Flat Plateuations that gives two primary decks for the flow structure. In a limit equivalent to keeping the Viscous Interaction Parameter χ fixed as the reciprocal of the Reynolds number ∈→0, scalings have been studied that recover the Stewartson structure of an inner high temperature boundary layer deck and

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Effect of Mach Number on Instability Waves Generated from a Localized Disturbancetability theory and direct numerical integration approach. Results, presented for Mach numbers of 0, 2 and 7, show that disturbances spread in wedge-shaped regions behind the source and the wedge angle decreases with Mach number. The lateral spreading angle for the instability waves turns out to be