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 8 of 8 for “"real gas effects"”.
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Real gas effects in ORC turbines
This thesis aims to study the effects of varying gas properties on turbine performance. Most prominently ORC turbines are operating with a multitude of different working fluids that have very strong variations in gas properties. Moreover, this also applies to conventional steam turbines or first …
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An investigation of real gas effects in supercritical CO₂ compressors
… thesis presents a comprehensive assessment of real gas effects on the performance and matching of centrifugal compressors operating with CO2 at supercritical conditions. The analytical framework combines first principles based modeling with targeted numerical simulations to characterize the …
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Numerical simulation of chemically reactive hypersonic flows
… and thermalnonequilibrium are needed for a realistic prediction of hypersonic flowfields. One of the key issues in the design of a hypersonic vehicle is theevaluation of aerodynamic heating. Especially, shock-shock interferenceheating phenomena is an important and critical problem in the …
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Techniques for compressible flow calculations on multi-zone grids
… compressible flowfields about 3-D realistic aerodynamic bodies, the combined use of an implicit, upwind biased real gas scheme with 3-D fully conservative patched grid techniques is discussed. An "equivalent" gamma formulation is implemented in order to model real gas effects in Van …
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Numerische Simulation des Wärmeübergangs in einer kryogenen Raketenbrennkammer
… heat conductivity of the fluid. The turbulent effects were represented by the q-omega Low-Reynolds turbulence model, while the gas mixture and real gas effects werde considered in the gas conductivity. With these models, the heat load was simulated by a fluid/structure interaction simulation in …
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Three-dimensional nonequilibrium viscous shock-layer flow over the space shuttle orbiter
… existing viscous shock-layer method for perfect gas flows has been extended to include finite-rate chemical reactions of multi-component ionizing air. A general nonorthogonal computational grid system was introduced to treat the nonaxisymmetric geometry. At shuttle reentry flight conditions, …
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Pressure-temperature boundaries for ideal dissociating and ionizing gases
… of determining thermodynamic properties of gaseous systems in which real-gas effects must be considered can be greatly simplified through use of existing ideal-gas theories for the processes of dissociation and ionization. Since, however, the ideal dissociating gas theory neglects ionization …
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Modeling and Simulation of High-Density Spray Combustion
<p>High-efficiencies and low-emissions can be realized in combustion engines that operate at high-pressures and low-temperatures conditions (high densities). The design of such engines relies on accurate models of the physical processes involved. Three areas of concern are multi-phase phenomena, …