Search for dissertations about: "unsteady CFD"
Showing result 16 - 20 of 60 swedish dissertations containing the words unsteady CFD.
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16. Development and Validation of a Numerical Tool for the Aeromechanical Design of Turbomachinery
Abstract : In aeromechanical design one of the major rules is to operate under High Cyclic Fatigue (HCF) margins and away from flutter. The level of dynamic excitations and risk of HCF can be estimated by performing forced response analyses from blade row interaction forces or Low Engine Order (LEO) excitation mechanisms. READ MORE
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17. Experimental Investigation of the Influence of Local Flow Features on the Aerodynamic Damping of an Oscillating Blade Row
Abstract : The general trend of efficiency increase, weight and noise reduction has derived in the design of more slender, loaded, and 3D shaped blades. This has a significant impact on the stability of fan, and low pressure turbine blades, which are more prone to aeroelastic phenomena such as flutter. READ MORE
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18. Approaching Large Eddy Simulation of Cavitating Flows for Marine Applications
Abstract : Cavitation is a major concern in naval craft design as well as in the shipping industry. Although the nature of cavitation is not fully understood, propellerdesigns are presently improved by experimental analysis of the phenomena. READ MORE
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19. Application of Parallel Computers to Enhance the Flow Modelling Capability in Aircraft Design
Abstract : The development process for new aircraft configurations needs to be more efficient in terms of performance, cost and time to market. The potential to influence these factors is highest in early design phases. Thus, high confidence must be established in the product earlier than today. READ MORE
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20. On some positive effects of swirling flow for the continuous cast mould billets
Abstract : Continuous caster moulds are the last and most important stage in the steelmaking process, where inclusions can either be generated or removed. With increasing casting speed using conventional immersion nozzles critical problems, such as unstable bulk mould flow have been noticed. READ MORE