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RISExperimental and Theoretical Investigation of Thermal Effectiveness in Multiperforated Plates for Combustor Liner Effusion Cooling
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Stateoftheart liner cooling technology for modern combustors is represented by effusion cooling (or fullcoverage film cooling). Effusion is a very efficient cooling strategy based on the use of multiperforated liners, where ...
Effect of Temperature Ratio on Jet Impingement Heat Transfer in Active Clearance Control Systems
Publisher: American Society of Mechanical Engineers (ASME)
Abstract: Impinging jet arrays are typically used to cool several gas turbine parts. Some examples of such applications can be found in the internal cooling of high-pressure turbine airfoils or in the turbine blade tip clearances ...
Heat Transfer Measurements in a Leading Edge Geometry With Racetrack Holes and Film Cooling Extraction
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An experimental survey on a state of the art leading edge cooling scheme was performed to evaluate heat transfer coefficients (HTC) on a large scale test facility simulating a high pressure turbine airfoil leading edge ...
Heat Transfer and Pressure Loss Measurements of Matrix Cooling Geometries for Gas Turbine Airfoils
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Matrix cooling systems are relatively unknown among gas turbines manufacturers of the western world. In comparison to conventional turbulated serpentines or pin–fin geometries, a lattice–matrix structure can potentially ...
Development of an Engine Representative Combustor Simulator Dedicated to Hot Streak Generation
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Nowadays, the lack of confidence in the prediction of combustorturbine interactions and more specifically our ability to predict the migration of hot spots through this interface leads to the application of extra safety ...
Experimental and Numerical Analysis of Multiple Impingement Jet Arrays for an Active Clearance Control System
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The turbine blade tip clearances control in large aeroengines is currently performed by means of impinging fan air on the outer case flanges. The aim of the present study is to evaluate both the heat transfer coefficient ...
Experimental and Numerical Calculation of Turbulent Timescales at the Exit of an Engine Representative Combustor Simulator
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: To deepen the knowledge of the interaction between modern lean burn combustors and high pressure (HP) turbines, a nonreactive real scale annular trisector combustor simulator (CS) has been assembled at University of Florence ...
Experimental and Numerical Investigation on Windage Power Losses in High Speed Gears
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Enhancing the efficiency of gearing systems is an important topic for the development of future aero-engines with low specific fuel consumption. An evaluation of its structure and performance is mandatory in order to ...
Effect of Jet-to-Jet Distance and Pipe Position on Flow and Heat Transfer Features of Active Clearance Control Systems
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The goal of this work is to investigate the effect of supply pipe position on the heat transfer features of various active clearance control (ACC) geometries, characterized by different jet-to-jet distances. All geometries ...
Development of Experimental and Numerical Methods for the Analysis of Active Clearance Control Systems1
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The ever increasing performance requirements of modern aeroengines necessitate the development of effective ways to improve efficiency and reduce losses. Casing temperature control is particularly critical from this point ...