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RISLaminar and Transitional Boundary Layer Structures in Accelerating Flow With Heat Transfer
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The accurate prediction of heat transfer coefficients on cooled gas turbine blades requires consideration of various influence parameters. The present study continues previous work with special ...
Heat Transfer Measurements Downstream of a Two-Dimensional Jet Entering a Crossflow
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Nusselt and Stanton numbers have been evaluated in and behind the recirculating zone produced by a two-dimensional jet entering a crossflow. The momentum flux ratio of the jet to the main ...
Swirl and Counterswirl Effects in Prefilming Airblast Atomizers
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The performance characteristics of prefilming airblast atomizers depend largely on the shear stresses in each of the two air supply channels. As an extension of previously reported results, ...
Free-Stream Turbulence and Pressure Gradient Effects on Heat Transfer and Boundary Layer Development on Highly Cooled Surfaces
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Heat transfer and boundary layer measurements were derived from flows over a cooled flat plate with various free-stream turbulence intensities (Tu = 1.6–11 percent), favorable pressure gradients ...
Internal Flow Effects in Prefilming Airblast Atomizers: Mechanisms of Atomization and Droplet Spectra
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Fuel atomization with prefilming airblast nozzles has been investigated. The present analysis is directed toward a detailed investigation of the atomization processes and the clarification of the ...
Two-Phase Air/Oil Flow in Aero Engine Bearing Chambers: Characterization of Oil Film Flows
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: For the design of secondary air and lubrication oil systems, a sufficient knowledge of two-phase flow and heat transfer phenomena under bearing chamber flow conditions is required. The ...
Experimental and Numerical Investigation on the Evaporation of Shear-Driven Multicomponent Liquid Wall Films
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: for the calculations of the multicomponent evaporation were implemented in a well tested elliptic finite-volume code GAP-2D (S. Wittig et al., 1992, “Motion and Evaporation of Shear-Driven Liquid Films in Turbulent Gas,” ASME J. Eng...
The Influence of the Recirculation Region: A Comparison of the Convective Heat Transfer Downstream of a Backward-Facing Step and Behind a Jet in a Crossflow
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Convective heat transfer is examined in two typical examples of separated flows, namely, the flow over a backward-facing step and a two-dimensional jet entering a crossflow. Local Nusselt numbers ...
Discharge Coefficients of Rotating Short Orifices With Radiused and Chamfered Inlets
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The secondary air system of modern gas turbine engines consists of numerous stationary or rotating passages to transport the cooling air, taken from the compressor, to thermally high loaded ...
Direct-Transfer Preswirl System: A One-Dimensional Modular Characterization of the Flow
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In high-efficiency gas turbine engines, the cooling air for the high-pressure turbine stage is expanded through stationary preswirl nozzles, transferred through the preswirl chamber, and delivered ...