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 “"Non-isentropic"”.
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Indirect noise in non-isentropic flows
… models in the literature assume the flow to be isentropic. However, in real situations, the flow is non-isentropic because of losses due to factors such as viscosity and recirculation zones. Recent studies showed, because of flow dissipation, there is a mismatch in the theoretical predictions …
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Theoretical investigation of the second shock in the blast wave
… theories of blast waves in that an additional non-isentropic region actually exists inside of the interface between the driven and the driving gas. This thesis investigates the behavior of this second shock and the resultant flow patterns.
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Shock formation in overexpanded flow: a study using the hydraulic analogy
… a large model size. The modified analogy for non-isentropic flow then allowed quantitative evaluation of the modeled shock structure in a compressible flow field. The predicted shock formation in such a flow has possible implications for both the efficiency of a gas turbine and the useful life …
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Three Problems Involving Compressible Flow with Large Bulk Viscosity and Non-Convex Equations of State
… flows of Navier-Stokes fluids. In each problem non-classical effects are considered. In the first two problems, we consider fluids which have bulk viscosities which are much larger than their shear viscosities. In the last problem, we examine steady supersonic flows of a …
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Behaviour of accelerating entropy spots
… indirectly from the acceleration of regions of non-uniform temperature, density and composition (entropy and composition spots) through narrow passages such as nozzles or turbine guide vanes. Entropy-generated sound waves are both transmitted downstream of the acceleration point, contributing to …
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Application of Improved Truncation Error Estimation Techniques to Adjoint Based Error Estimation and Grid Adaptation
… grid error estimate is shown to work well for a non-isentropic flow for the quasi-1D Euler equations, but all truncation error estimations methods ultimately result in over prediction of functional discretization error in the presence of a shock in 2D. Alternatives to adjoint methods, which can …
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Performance and power smoothing of innovative closed-circuit oscillating water column wave energy converter
… new Tupperwave concept is equipped with non-return valves and air pressure accumulators to create a smooth unidirectional air flow, harnessed efficiently by a unidirectional turbine. In this thesis, the Tupperwave concept is investigated physically and numerically on a floating structure. …