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RISLarge Eddy Simulation of Heat Transfer Within a Multi-Perforation Synthetic Jets Configuration
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Synthetic jets are produced by devices that enable a suction phase followed by an ejection phase. The resulting mean mass budget is hence null and no addition of mass in the system is required. These particular jets have ...
Analysis of the Unsteady Flow Field Inside a Fan-Shaped Cooling Hole Predicted by Large Eddy Simulation
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Film cooling is a common technique to manage turbine vane and blade thermal environment. Optimizing its cooling efficiency is furthermore an active research topic which goes in hand with a strong knowledge of the flow ...
Large Eddy Simulation of a Pistonless Constant Volume Combustor: A New Concept of Pressure Gain Combustion
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Classical gas turbine thermodynamic cycle has undergone no change over the last decades. The most important efficiency improvements have been obtained by reducing thermal losses and raising the overall pressure ratio and ...
Large-Eddy Simulation of the Flow Developing in Static and Rotating Ribbed Channels
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In the present work, the turbulent flow fields in a static and rotating ribbed channel representative of an aeronautical gas turbine are investigated by the means of wall-resolved compressible large-Eddy simulation (LES). ...
Unsteady Analysis of Heat Transfer Coefficient Distribution in a Static Ribbed Channel for An Established Flow
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Turbulent-ribbed channels are extensively used in turbomachinery to enhance convective heat transfer in internally cooled components such as turbine blades. One of the key aspects of such a problem is the distribution of ...
Accurate Inlet Boundary Conditions to Capture Combustion Chamber and Turbine Coupling With Large-Eddy Simulation
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The coupling between different components of a turbomachinery is becoming more widely studied especially by use of computational fluid dynamics. Such simulations are of particular interest especially at the interface between ...
Large Eddy Simulation and Conjugate Heat Transfer Around a Low Mach Turbine Blade
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Determination of heat loads is a key issue in the design of gas turbines. In order to optimize the cooling, an exact knowledge of the heat flux and temperature distributions on the airfoils surface is necessary. Heat ...
Effects of Subgrid Scale Modeling on the Deterministic and Stochastic Turbulent Energetic Distribution in Large Eddy Simulations of a High Pressure Turbine Stage
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This study focuses on the enginerepresentative MT1 transonic highpressure turbine. Simulated by use of wallmodeled largeeddy simulations (LES) with three different subgrid scale (SGS) closures, mean pressure profiles across ...
Steady/Unsteady Reynolds Averaged Navier–Stokes and Large Eddy Simulations of a Turbine Blade at High Subsonic Outlet Mach Number
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Reynoldsaveraged Navier–Stokes (RANS), unsteady RANS (URANS), and large eddy simulation (LES) numerical approaches are clear candidates for the understanding of turbine blade flows. For such blades, the flow unsteady ...
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 ...