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RISCalibration 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 ...
Numerical Benchmark of Nonconventional RANS Turbulence Models for Film and Effusion Cooling
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Over the course of the years, several turbulence models specifically developed to improve the predicting capabilities of conventional twoequations Reynoldsaveraged Navier–Stokes (RANS) models have been proposed. They ...
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 ...
Thermofluid Dynamic Analysis of a Gas Turbine Transition Piece
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The transitionpiece of a gas turbine engine is subjected to high thermal loads as it collects high temperature combustion products from the gas generator to a turbine. This generally produces high thermal stress levels in ...
Investigation on the Effect of a Realistic Flow Field on the Adiabatic Effectiveness of an Effusion Cooled Combustor
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Effusion cooling represents the state of the art of liner cooling technology for modern combustors. This technique consists of an array of closely spaced discrete film cooling holes and contributes to lower the metal ...
Heat Transfer Augmentation Due to Coolant Extraction on the Cold Side of Active Clearance Control Manifolds
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Jet array is an arrangement typically used to cool several gas turbine parts. Some examples of such applications can be found in the impingement cooled region of gas turbine airfoils or in the turbine blade tip clearances ...
Metal Temperature Prediction of a Dry Low NOx Class Flame Tube by Computational Fluid Dynamics Conjugate Heat Transfer Approach
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Combustor liner of present gas turbine engines is subjected to high thermal loads as it surrounds high temperature combustion reactants and is hence facing the related radiative load. This generally produces high thermal ...