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RISAveraging for High Fidelity Modeling—Toward Large Eddy Simulations in Multi-Passage Multi-Row Configurations
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A major challenge in high-fidelity turbomachinery flow computations is the need for high resolution in a very large domain of multiple blade-passages and multiple blade rows. Scale-resolving turbulent solutions are ...
Spectral Heat Transfer Coefficient for Thermal Design Analysis—Part 1: Augmenting the Cooling Law for Non-Isothermal Wall
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: There are two major issues of interest in relation to Newton's law of cooling. The first is its applicability to flow bounded by a nonisothermal wall where the wall surface temperature is nonuniform. The second is the ...
Spectral Heat Transfer Coefficient for Thermal Design Analysis—Part II: Leveraging Diabatic Wall Conditioning for Nonlinear Regime
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: There are two main issues of interest in the context of Newton's law of cooling as applied to turbine aerothermal designs. First, in a linear aerothermal regime in which both the conventional wisdom in general and the law ...
Validation Studies of Linear Oscillating Compressor Cascade and Use of Influence Coefficient Method
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Advanced predictions of blade flutter have been continually pursued. It is noted however that validation cases of unsteady CFD methods against experimental cases with detailed 3D unsteady pressures are still rather lacking. ...
Application of Multiscale Methodology for Transonic Turbine Blade Tip Cooling Design
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Recent research suggests that the cooling flow at transonic turbine tip has several unique flow features such as the strong interaction with the base flow, the acceleration at divergent duct, the strong shock boundary layer ...
Implicit Discontinuous Galerkin Solution on Unstructured Mesh for Turbine Blade Secondary Flow
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: To enhance solution accuracy with high-order methods, an implicit solver using the discontinuous Galerkin (DG) discretization on unstructured mesh has been developed. The DG scheme is favored chiefly due to its distinctive ...
Use of an Immersed Mesh for High Resolution Modeling of Film Cooling Flows
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The development of a high pressure turbine requires the accurate prediction of flow within and around film cooling holes. However, the length scales inherent to film cooling flows produce a large disparity against those ...
Tip Shaping for HP Turbine Blade Aerothermal Performance Management
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A large portion of the overtip leakage flow is often transonic for a typical high pressure (HP) turbine blade. It has been observed that the tip heat transfer is noticeably lower in a high speed flow tip region than in a ...
Space–Time Gradient Method for Unsteady Bladerow Interaction—Part I: Basic Methodology and Verification
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: For advanced turbomachinery development, there is increasing interest to carry out unsteady analyses for flows through multiple bladerows during a design stage. Even with the huge increase in computer processing power ...
Two-Scale Methodology for URANS/Large Eddy Simulation Solutions of Unsteady Turbomachinery Flows
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A general issue in turbomachinery flow computations is how to capture and resolve two kinds of unsteadiness efficiently and accurately: (a) deterministic disturbances with temporal and spatial periodicities linked to blade ...