Sökning: "rotor aerodynamics"
Visar resultat 1 - 5 av 30 avhandlingar innehållade orden rotor aerodynamics.
1. Experimental Investigation of the Aerodynamics and Heat Transfer in an Intermediate Turbine Duct
Sammanfattning : In today’s aero engines with large bypass ratios, the difference in diameter between the high pressure turbine and the downstream turbine, being either an intermediate or low pressure turbine, is large. There is also scope to further increase it, in order to increase the efficiency of the downstream turbine and enabling use of larger diameter fans. LÄS MER
2. Numerical Investigation of the Aerodynamic Vibration Excitation of High-Pressure Turbine Rotors
Sammanfattning : The design parameters axial gap and stator count of highpressure turbine stages are evaluated numerically towards theirinfluence on the unsteady aerodynamic excitation of rotorblades. Of particular interest is if and how unsteadyaerodynamic considerations in the design could reduce the riskofhigh cycle fatigue (HCF) failures of the turbine rotor. LÄS MER
3. Aerodynamics of Vertical Axis Wind Turbines : Development of Simulation Tools and Experiments
Sammanfattning : This thesis combines measurements with the development of simulation tools for vertical axis wind turbines (VAWT). Numerical models of aerodynamic blade forces are developed and validated against experiments. The studies were made on VAWTs which were operated at open sites. LÄS MER
4. Simulating Dynamical Behaviour of Wind Power Structures
Sammanfattning : The workin this thesis deals with the development of anaeroelastic simulation tool for horizontal axis wind turbineapplications.Horizontal axiswind turbines can experience significanttime varying aerodynamic loads, potentially causing adverseeffects on structures, mechanical components, and powerproduction. LÄS MER
5. Aerothermal Study of Intermediate Turbine Ducts
Sammanfattning : An intermediate turbine duct guides the flow from the smaller diameter high pressure turbine to the downstream larger diameter intermediate or low pressure turbine. It is typically equipped with a structural vane transferring loads for the core to the external parts, and supplies the core with necessary services such as oil and air. LÄS MER