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RISNumerical Characterization of Pressure Drop Across the Manifold of Turbine Casing Cooling System
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An array of jets is an arrangement typically used to cool several gas turbine parts. Some examples of such applications can be found in the impingement cooling systems of turbine blades and vanes or in the turbine blade ...
Calibration of a Computational Fluid Dynamics Methodology for the Simulation of Roughness Effects on Friction and Heat Transfer in Additive Manufactured Components
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: It is well known from the literature that surface roughness significantly affects friction and heat transfer. This is even more evident for additive manufactured (AM) components, which are taking an increasingly important ...
Heat Transfer Enhancement Due to Coolant Extraction on the Cold Side of Effusion Cooling Plates
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Effusion cooling represents one of the most innovative techniques to limit and control the metal temperature of combustors liner, and recently, attention has been paid by the scientific community on the characterization ...
Effects of Impeller Squealer Tip on Centrifugal Compressor Performance
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper summarizes the main results sorted out from a design of experiment (DoE) based on a validated computational fluid dynamics (CFD). Several tip recessed geometries applied to an unshrouded impeller were considered ...
Numerical Characterization of Flow and Heat Transfer in Preswirl Systems
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper deals with a numerical study aimed at the validation of a computational procedure for the aerothermal characterization of preswirl systems employed in axial gas turbines. The numerical campaign focused on an ...
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 ...
On the Extrapolation of Rim Sealing Performance From Test Bench to Real Engine: A Numerical Survey
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The main annulus hot gas ingress into turbine wheel-spaces is still one of the most challenging problems designers face. During the decades, several experimental test benches were developed worldwide to improve the knowledge ...
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 ...
Local Source Based CFD Modeling of Effusion Cooling Holes: Validation and Application to an Actual Combustor Test Case
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Stateoftheart liner cooling technology for modern combustion chambers is represented by effusion cooling (or fullcoverage film cooling). Effusion is a very efficient cooling strategy typically based on the use of several ...
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 ...