Sökning: "numerical-simulation"
Visar resultat 11 - 15 av 344 avhandlingar innehållade ordet numerical-simulation.
11. Direct numerical simulation of turbulent flow in plane and cylindrical geometries
Sammanfattning : This thesis deals with numerical simulation of turbulentflows in geometrically simple cases. Both plane and cylindricalgeometries are used. The simplicity of the geometry allows theuse of spectral methods which yield a very high accuracy usingrelatively few grid points. A spectral method for planegeometries is implemented on a parallel computer. LÄS MER
12. Numerical simulation of turbine blade heat transfer
Sammanfattning : .... LÄS MER
13. Direct numerical simulation of turbulent premixed flames at high Karlovitz numbers: structure and modelling
Sammanfattning : There has been recent increased interest in premixed flames and in particular for use in gas turbines for power generation. This is a development that follows from increasing demands for high efficiency and low emissions of NOx, which can be achieved by using premixed flames and lean pre-heated mixtures, often close to the lean flammability limit. LÄS MER
14. Fundamental studies of non-premixed combustion in turbulent wall jets using direct numerical simulation
Sammanfattning : The present thesis deals with the fundamental aspects of turbulent mixingand non-premixed combustion in wall-jet flows. Direct numerical simulations(DNS) of compressible turbulent flows are performed in a wall-jet configura-tion, which has a close resemblance to many industrial combustion applica-tions. LÄS MER
15. Modeling and numerical simulation of hydro power flows
Sammanfattning : This work is about high precision numerical water flow simulations of hydro power related applications, and especially draft tube flows. Because of the accuracy requirements for these types of simulations (the efficiency of a hydro power turbine can be over 90%), the work has been devided into several steps; verification, validation and modeling. LÄS MER