Sökning: "film flow"
Visar resultat 16 - 20 av 178 avhandlingar innehållade orden film flow.
16. Transient Air to Fuel Ratio Response in a Fuel Injected S.I Engine
Sammanfattning : Future emission standards make it necessary to focus on the conditions under which engine emissions are produced, especially before the catalyst light off. During practical driving conditions, such as those represented by the FTP 75 test cycle, the engine is operated very much under transient conditions regarding load and speed. LÄS MER
17. Nature-inspired passive flow control using various coatings and appendages
Sammanfattning : There is a wide variety of tails, fins, scales, riblets and surface coatings, which are used by motile animals in nature. Since organisms currently living on earth have gone through millions of years of evolution, one can expect that their design is optimal for their tasks, including locomotion. LÄS MER
18. Aerodynamic Investigation of Leading Edge Contouring and External Cooling on a Transonic Turbine Vane
Sammanfattning : Efficiency improvement in turbomachines is an important aspect in reducing the use of fossil-based fuel and thereby reducing carbon dioxide emissions in order to achieve a sustainable future. Gas turbines are mainly fossil-based turbomachines powering aviation and land-based power plants. LÄS MER
19. CFD Simulations for Film Cooling : Reduced Models at Engine Like Conditions
Sammanfattning : In gas turbines some parts are exposed to combustion gases with temperatures well above the melting temperature of the material. Therefore, various cooling techniques are utilized in order to protect the parts exposed to these hot gases. One such technique, film cooling, is a common and well established way to protect the exposed parts. LÄS MER
20. Solution-Chemical Synthesis of Cobalt and Iron:Zinc Oxide Nanocomposite Films
Sammanfattning : The potentially most important challenges today are related to energy and the environment. New materials and methods are needed in order to, in a sustainable way, convert and store energy, reduce pollution, and clean the air and water from contaminations. LÄS MER