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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"turbine airfoil"”.
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A three-pronged approach addressing capacity concerns in advanced turbine airfoil coatings
… was performed using this methodology at the Turbine Module Center at Pratt and Whitney.
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Experimental Investigation of the Active Flow Control on a Two-Dimensional Wind Turbine Airfoil
<p>Wind turbine blades experience unsteady aerodynamic loading under various off-design conditions. The fatigue loading reduces the operational time of the wind turbine hence leads to an increase in the Cost of Energy (CoE) of the wind power. In this study, active flow control with unsteady blowing …
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Investigation into the optimal cooling configuration for a gas turbine airfoil utilizing a thermal barrier coating
The overall cooling effectiveness of a gas turbine airfoil characterizes the conjugate effect of both film cooling and internal cooling on an airfoil in one parameter. Few studies in open literature have explored the overall cooling effectiveness of airfoil's utilizing a thermal barrier coating. In …
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Using optimization and lean principles to design work cells and make capital purchase decisions for hole drilling operations in turbine airfoil manufacturing
Classical manufacturing work cells have machines to perform each operation in the process, the number of each type of machine being chosen so that all machines would be equally busy. Although design of work cells for producing one product is straightforward, the design of a multi-product work cell …
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Experiments and simulation of shaped film cooling holes fed by crossflow with rib turbulators
Most studies of turbine airfoil film cooling in laboratories have used relatively large plenums to feed flow into the coolant holes. A more realistic inlet condition for the film cooling holes is an internal crossflow channel. In this study, angled rib turbulators were installed in two geometric …
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Turbine blade erosion and the use of wind protection tape
The aerodynamic performance of wind turbine airfoils with leading edge erosion was investigated in this research. The tests were conducted on DU 96-W-180 wind turbine airfoil at three Reynolds numbers between 1 and 1.85 million and angles of attack spanning the low drag range of the airfoil. The …
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Numerical Loss Prediction of high Pressure Steam Turbine airfoils
Steam turbines are widely used in various industrial applications, primarily for power extraction. However, deviation for operating design conditions is a frequent occurrence for such machines, and therefore, understanding their performance at off design conditions is critical to ensure that the …
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Heat Transfer Coefficient and Adiabatic Effectiveness Measurements for an Internal Turbine Vane Cooling Feature
… and efficiency by continually increasing the turbine inlet temperature. High turbine inlet temperatures significantly degrade the lifetime of components in the turbine. Modern gas turbines operate with turbine inlet temperatures well above the melting temperature of key turbine components. …
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Experimental investigation of overall effectiveness and coolant jet interactions on a fully cooled C3X turbine vane
… the performance of a fully cooled, scaled up C3X turbine vane. Experimental measurements focused on investigating row-to-row interactions of coolant jets and the contributions of external film cooling and internal impingement cooling to overall cooling effectiveness. Overall effectiveness was …
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Effect of hole configurations on film cooling from cylindrical inclined holes for the application to gas turbine blades
… systems investigated for the application to gas turbine blades. Gas turbines use film cooling in addition to turbulated internal cooling to protect the blades outer surface from hot gases. The present study concentrates on the experimental and numerical investigation of film cooling performance …
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Loss mechanisms in a highly loaded transonic axial turbine stage
… stage highly loaded transonic axial turbine representative of future generation turbine technology is assessed for its role in loss generation. Steady and unsteady two-dimensional and three-dimensional flow computations, complemented by simplistic control volume analyses as well as …
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Advanced Instrumentation and Measurements Techniques for Near Surface Flows
… of aerodynamic boundary layers on wind turbine blades is an important consideration in their performance. It can be quite challenging to replicate full scale conditions in laboratory experiments, and advanced diagnostics become valuable in providing data not available from traditional …
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Development of Advanced Internal Cooling Technologies for Gas Turbine Airfoils under Stationary and Rotating Conditions
Higher turbine inlet temperatures (TIT) are required for higher overall efficiency of gas turbine engines. Due to the constant push towards achieving high TIT, the heat load on high pressure turbine components has been increasing with time. Gas turbine airfoils are equipped with several …
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Optimized design of aerodynamic airfolis for vertical axis wind turbines
… their higher energy output, horizontal-axis wind turbines have been traditionally the preferred option. Nevertheless, vertical-axis wind turbines are becoming relevant, specially in urban areas. Their advantages evidence the need of further research to overcome the main drawbacks that prevent …
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An Investigation of Mist/Air Film Cooling with Application to Gas Turbine Airfoils
… technique widely used in high-performance gas turbines</p> <p>to protect turbine airfoils from being damaged by hot flue gases. Film injection holes are</p> <p>placed in the body of the airfoil to allow coolant to pass from the internal cavity to the</p> <p>external surface. The ejection of …