Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"Instability Modes"”.
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Data Analysis of an Unsteady Cavitating Flow on a Venturi-type Profile
The instability modes and non-linear behavior of a cavitating flow have been studied based on the experimental data obtained from planar Particle Image Velocimetry (PIV). Three data-driven techniques, Proper Orthogonal Decomposition (POD), Dynamic Mode Decomposition (DMD), and Clustered-based …
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Etude expérimentale des sons auto-entretenus produits par un jet issu d'un conduit et heurtant une plaque fendue
… domain of the fundamental is defined by the two instability modes of the jet. If the edge of the slot is beveled and if this one is placed backwards to the flow, the tones occurs at a lower speed (3.5 m/s) as soon as the jet becomes turbulent, and the excitation of an acoustic resonator is then …
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Quantification of linear and nonlinear energy transfer processes in a plane wake
… a narrow, but continuous, band of dominant instability modes centered near the most unstable mode, known also as the fundamental mode, grow exponentially at rates that can be calculated from the linearized Navier-Stokes equations. As these modes grow, the nonlinear terms become more …
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Stability and transition of three-dimensional rotating boundary layers
… is susceptible to crossflow and centrifugal instability modes of spiral nature, depending on the cone half-angle. For parameters ranging from propeller nose cones to rotating disks, the instability triggers co-rotating vortices, whereas for slender spinning missiles, counter-rotating vortices …
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Sensitivity Analysis and Uncertainty Quantification of Plasma Jet Instabilities in the VKI Plasmatron
… the jet generated by the facility undergoes instability phenomena, which must be investigated for a correct characterization of the freestream flow and interpretation of the thermal response of the material under study. The overarching objective of this final-year project is to study the …
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Stability, LES, and Resolvent Analysis of Thermally Non-uniform Supersonic Jet Noise
… is organized into three studies that focus on instability, large eddy simulations, and resolvent modes. The first study is a computational investigation of the role of thermal non-uniformity on the development of instability modes in the shear-layer of a supersonic $M= 1.5$, $Re=850,000$ jet. …
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Flow and heat transfer characteristics of turbulent swirling impinging jets [thesis]
… jets, induces vortex breakdown and other instability modes. The addition of swirl to impinging jets thus has the potential to affect the transient and steady-state convective behaviour, both of which are crucial in industrial applications. This study features experimental and numerical …