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RISFlow-Field Measurements in a Metal Additively Manufactured Offset Strip Fin Array Using Laser Doppler Velocimetry
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Metal additive manufacturing (AM) of heat exchanger enables custom and conformal designs for a wide range of applications. However, one challenge with metal AM is the resultant surface roughness formed when using this ...
Cooling Effectiveness for a Shaped Film Cooling Hole at a Range of Compound Angles
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Shaped film cooling holes are a well-established cooling technique used in gas turbines to keep component metal temperatures in an acceptable range. One of the goals of film cooling is to reduce the driving temperature for ...
Overall Pressure Loss and Heat Transfer Performance of Additively Manufactured Offset Strip Fins Used in Compact Heat Exchangers
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Preliminary heat exchanger design relies heavily on correlations for overall heat transfer and pressure drop performance, particularly for heat transfer augmentation features such as fins. Extensive work has been performed ...
Heat Transfer Coefficient Augmentation for a Shaped Film Cooling Hole at a Range of Compound Angles
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Film cooling holes with shaped diffusers are used to efficiently deliver coolant to the surface of a gas turbine part to keep metal temperatures low. Reducing the heat flux into a component, relative to a case with no ...
Effect of Ceramic Matrix Composites on the Thermal Efficiency of a Power Generation Turbine
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Ceramic matrix composites (CMCs) offer higher allowable temperatures and reduced weight, making them an attractive prospect for parts in the hot section of a gas turbine engine. As CMCs are increasingly adapted into aero ...
Experimental Investigation of Mach Number Effect on Overall Cooling Effectiveness for a Transonic Vane
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Abstract. To keep metal temperature at allowable levels in modern gas turbine engines, both internal and external (film) cooling is necessary, which is represented by an overall cooling effectiveness. Previous studies ...
Comparison of the Three Dimensional Boundary Layer on Flat Versus Contoured Turbine Endwalls
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The boundary layer on the endwall of an axial turbomachine passage is influenced by streamwise and crossstream pressure gradients, as well as a large streamwise vortex, that develop in the passage. These influences distort ...
The Effect of a Meter-Diffuser Offset on Shaped Film Cooling Hole Adiabatic Effectiveness
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Shaped film cooling holes are used extensively in gas turbines to reduce component temperatures. These holes generally consist of a metering section through the material and a diffuser to spread coolant over the surface. ...
Heat Transfer and Film Cooling on a Contoured Blade Endwall With Platform Gap Leakage
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Turbine blade components in an engine are typically designed with gaps between parts due to manufacturing, assembly, and operational considerations. Coolant is provided to these gaps to limit the ingestion of hot combustion ...
The Effect of Area Ratio Change Via Increased Hole Length for Shaped Film Cooling Holes With Constant Expansion Angles
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Shaped film cooling holes are used as a cooling technology in gas turbines to reduce metal temperatures and improve durability, and they generally consist of a small metering section connected to a diffuser that expands ...