– Impingement Cooling
– Impingement Jet Array Heat Transfer With Surface Textures
– Surface Roughness Characterization and Analysis
– Dimple Surface Arrays
– Swirl Chambers
– Surface Heat Transfer Augmentation Within Internal Passages
– Film Cooling
– Full-Coverage Film Cooling
– Double Wall Cooling
– Second Law Analysis of Film Cooling
– Aerodynamic Losses From Turbine Airfoils
– Transonic Turbine Blade Tips
– Transonic Turbine Blade Tips With Film Cooling
– Transonic Turbine Alloy Blades
– Supersonic Flow Experimental Results
– Shock Wave Unsteady Interactions
– Viscous Dissipation Within a Transonic Flow Environment
– Transitional Flows in Curved Channels
– Dean Flow Dynamics in Low-Aspect Ratio Spiral Microchannels
– Unsteady Laminar Impinging Slot Jets
– Electronics Cooling
– Miniature and Micro-Scale Pumps
– Slip Rarefaction Phenomena
– Elastic Instabilities
– Buoyancy-Driven Continuous SPLITT Fractionation
VISCOUS DISSIPATION WITHIN A TRANSONIC FLOW ENVIRONMENT
Viscous Dissipation Within a Transonic Flow Environment
● Considered are experimental and analytic procedures for the measurement and determination of film cooling performance parameters for a transonic flow environment along a turbine blade tip, which account for the influences of viscous dissipation.
● Such viscous dissipation magnitudes are vital to ascertain appropriate driving temperatures for convective heat transfer within high velocity, compressible environments.
● A key step in this procedure is the separation of adiabatic surface temperature magnitudes due to the thermal field from adiabatic surface temperature values associated with flow effects related to viscous dissipation.
● These latter adiabatic surface temperature magnitudes, from flow effects only, are determined with no film cooling, which, when considered relative to flow stagnation temperature, are directly related to local Mach number values within the tip gap flow along the blade tip surface.
REFERENCE:
Measurement and Determination of Local Film Cooling Performance Along a Transonic Turbine Blade Tip With Viscous Dissipation (P. M. Ligrani, H. Collopy, and W. Manneschmidt), Measurement Science and Technology, Vol. 33, Paper No. 065302, pp. 1-28, March 2022.