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Theoretical Considerations for Scaling Convection in Overall Effectiveness Experiments
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An increasingly common experimental technique allows measurement of overall effectiveness by matching the Biot number between experimental and engine conditions. While much work has been devoted to determining the appropriate ...
Temperature Dependent Property Considerations for Biot Number Matching With Composite Materials
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: High-temperature materials such as ceramic matrix composites (CMCs) are promising for advancements in gas turbine engines; however, experimental techniques are necessary to characterize the thermal behavior of high-temperature ...
Conjugate Heat Transfer Simulations to Evaluate the Effect of Anisotropic Thermal Conductivity on Overall Cooling Effectiveness
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Ceramic matrix composites (CMCs) show promise as higher temperature capable alternatives to traditional metallic components in gas turbine engine hot gas paths. However, CMC components will still require both internal and ...
A Computational Technique to Evaluate the Relative Influence of Internal and External Cooling on Overall Effectiveness
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Gas turbine components are protected via a coolant that travels through internal passageways before being ejected as external film cooling. Modern computational approaches facilitate the simulation of the conjugate heat ...
Biot Number Error in Low-Temperature Inconel Overall Effectiveness Experiments
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: To predict the performance of turbine materials at engine conditions, experiments are often performed at low-temperature laboratory conditions. In order to ensure the low-temperature, laboratory results accurately predict ...
The Dufour Effect in Film Cooling Experiments With Foreign Gases
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In typical film cooling experiments, the adiabatic wall temperature may be determined from surface temperature measurements on a low thermal conductivity model in a low-temperature wind tunnel. In such experiments, it is ...
Influence of Scaling Parameters and Gas Properties on Overall Effectiveness on a Leading Edge Showerhead
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Testing new turbine cooling schemes at engine conditions becomes cost prohibitive as gas-path temperatures increase. As a result, turbine components are simulated in a laboratory with a large-scale model that is sized and ...
Experimental Evaluations of the Relative Contributions to Overall Effectiveness in Turbine Blade Leading Edge Cooling
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Gas turbine components are protected through a combination of internal cooling and external film cooling. Efforts aimed at improving cooling are often focused on either the internal cooling or the film cooling; however, ...
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