Sökning: "large eddy simulation"
Visar resultat 26 - 30 av 173 avhandlingar innehållade orden large eddy simulation.
26. Large Eddy Simulations of Separated Compressible Flows around Wing Sections
Sammanfattning : This thesis concerns numerical calculations of compressible separated flows, with and without shocks, around wing sections using Large Eddy Simulations (LES). The considered geometries are the NACA 0012 wing section and the ONERA AT15A wing section. LÄS MER
27. A Study of Mach 0.75 Jets and Their Radiated Sound Using Large-Eddy Simulation
Sammanfattning : Large-Eddy Simulations (LES) of a compressible nozzle/jet configuration have been carried out. Two jets were simulated, an isothermal jet and a jet with a higher temperature than the surrounding air. The Mach number was in both cases 0.75 and the jet Reynolds number was 50,000. LÄS MER
28. Subgrid-scale modelling for large-eddy simulation including scalar mixing in rotating turbulent shear flows
Sammanfattning : The aim of the present study is to develop subgrid-scale models that are relevant for complex flows and combustion. A stochastic model based on a stochastic Smagorinsky constant with adjustable variance and time scale is proposed. LÄS MER
29. Large Eddy Simulation of Cavitating Flow on Hydrofoils
Sammanfattning : Cavitation is the occurrence of vapour pockets in liquids due to the phenomenon that liquid may turn into vapour when the pressure in the flow is lowered below the vaporization pressure. It often brings negative effects such as performance degradation, noise and vibration, and material damage, therefore becoming one of the limiting factors when designing the propulsion systems. LÄS MER
30. Efficient Large-eddy Simulation for Wind Energy Applications
Sammanfattning : Modelling the interaction of wind turbines with the ambient flow is essential for almost all technical aspects of wind energy exploitation. Large-eddy simulation (LES) is the most detailed approach feasible to model this complex interaction of wind turbines with the atmospheric boundary layer and the wakes of upstream turbines. LÄS MER