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RISEffects of Surface Deposition, Hole Blockage, and Thermal Barrier Coating Spallation on Vane Endwall Film Cooling
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: With the increase in usage of gas turbines for power generation and given that natural gas resources continue to be depleted, it has become increasingly important to search for alternate fuels. ...
Bump and Trench Modifications to Film-Cooling Holes at the Vane-Endwall Junction
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The endwall of a first-stage vane experiences high heat transfer and low adiabatic effectiveness levels because of high turbine operating temperatures and formation of leading edge vortices. These ...
Film-Cooling Flowfields With Trenched Holes on an Endwall
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The leading edge region along the endwall of a stator vane experiences high heat transfer rates resulting from the formation of horseshoe vortices. Typical gas turbine endwall designs include ...
Experimental and Computational Comparisons of Fan-Shaped Film Cooling on a Turbine Vane Surface
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The flow exiting the combustor in a gas turbine engine is considerably hotter than the melting temperature of the turbine section components, of which the turbine nozzle guide vanes see the ...
A Comparison of Cylindrical and Fan-Shaped Film-Cooling Holes on a Vane Endwall at Low and High Freestream Turbulence Levels
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Fan-shaped film-cooling holes have been shown to provide superior cooling performance to cylindrical holes along flat plates and turbine airfoils over a large range of different conditions. ...
Effects of Simulated Particle Deposition on Film Cooling
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Diminishing natural gas resources has increased incentive to develop cleaner, more efficient combined-cycle power plants capable of burning alternative fuels such as coal-derived synthesis gas ...
The Effect of Combustor-Turbine Interface Gap Leakage on the Endwall Heat Transfer for a Nozzle Guide Vane
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: To enable turbine components to withstand high combustion temperatures, they are cooled by air routed from the compressor, which can leak through gaps between components. These gaps vary in ...
Enhanced Heat Transfer and Shear Stress Due to High Free-Stream Turbulence
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Surface heat transfer and skin friction enhancements, as a result of free-stream turbulence levels between 10 percent < Tu > 20 percent, have been measured and compared in terms of ...
Flowfield Measurements for a Highly Turbulent Flow in a Stator Vane Passage
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Turbine vanes experience high convective surface heat transfer as a consequence of the turbulent flow exiting the combustor. Before improvements to vane heat transfer predictions through boundary ...
High Free-Steam Turbulence Effects on Endwall Heat Transfer for a Gas Turbine Stator Vane
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: High free-stream turbulence along a gas turbine airfoil and strong secondary flows along the endwall have both been reported to increase convective heat transfer significantly. This study ...