Search
CSV
RISDirect Measurement of Heat Transfer Coefficient Augmentation at Multiple Density Ratios
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Knowing the heat transfer coefficient augmentation is imperative to predicting film cooling performance on turbine components. In the past, heat transfer coefficient augmentation was generally measured at unit density ratio ...
Effect of Internal Crossflow Velocity on Film Cooling Effectiveness—Part I: Axial Shaped Holes
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The effect of feeding shaped film cooling holes with an internal crossflow is not well understood. Previous studies have shown that internal crossflow reduces film cooling effectiveness from axial shaped holes, but little ...
Effect of Internal Crossflow Velocity on Film Cooling Effectiveness—Part II: Compound Angle Shaped Holes
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In gas turbine engines, film cooling holes are commonly fed with an internal crossflow, the magnitude of which has been shown to have a notable effect on film cooling effectiveness. In Part I of this study, as well as in ...
The Effect of Rib Turbulators on Film Cooling Effectiveness of Round Compound Angle Holes Fed by an Internal Cross Flow
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Early stage gas turbine blades feature complicated internal geometries in order to enhance internal heat transfer and to supply coolant for film cooling. Most film cooling experiments decouple the effect of internal coolant ...
Rib Turbulator Effects on Crossflow-Fed Shaped Film Cooling Holes
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Most studies of turbine airfoil film cooling in laboratory test facilities have used relatively large plenums to feed flow into the coolant holes. However, a more realistic inlet condition for the film cooling holes is a ...
Flow Physics of Diffused-Exit Film Cooling Holes Fed by Internal Crossflow
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Internal crossflow, or internal flow that is perpendicular to the overflowing mainstream, reduces film cooling effectiveness by disrupting the diffusion of coolant at the exit of axial shaped holes. Previous experimental ...
The Effect of Internal Crossflow on the Adiabatic Effectiveness of Compound Angle Film Cooling Holes
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In gas turbine engines, film cooling holes are often fed by an internal crossflow, with flow normal to the direction of the external flow around the airfoil. Many experimental studies have used a quiescent plenum to feed ...
Optimized Film Cooling Flow on a Contoured Endwall Within a Transonic Annular Cascade
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Film cooling was measured on the endwall of a five-vane annular cascade in a blowdown wind tunnel at an exit Mach number of 0.9. The adiabatic film cooling effectiveness was calculated from the partial pressure of oxygen ...
Upstream Film Cooling on the Contoured Endwall of a Transonic Turbine Vane in an Annular Cascade
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The effects of mainstream flow velocity, density ratio (DR), and coolant-to-mainstream mass flow ratio (MFR) on a vane endwall in a transonic, annular cascade were investigated. A blow down facility consisting of five vanes ...