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RISLarge-Eddy Simulation of Variable Speed Power Turbine Cascade With Inflow Turbulence
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Numerical results are presented from the National Aeronautics and Space Administration (NASA) Glenn Research Center's in-house turbomachinery code Glenn-HT applied to the variable-speed power turbine (VSPT) experiment at ...
Improved Prediction of Losses With Large Eddy Simulation in a Low-Pressure Turbine
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: There is a need to improve predictions of losses resulting from large eddy simulations (LES) of low-pressure turbines (LPT) in gas turbines. This may be done by assessing the accuracy of predictions against validation data ...
Deposition on a Cooled Nozzle Guide Vane With Nonuniform Inlet Temperatures
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: External deposition on a slot film cooled nozzle guide vane, subjected to nonuniform inlet temperatures, was investigated experimentally and computationally. Experiments were conducted using a fourvane cascade, operating ...
Computational Simulation of Deposition in a Cooled High-Pressure Turbine Stage With Hot Streaks
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Ash particle deposition in a high-pressure turbine stage was numerically investigated using steady Reynolds-averaged Navier-Stokes (RANS) and unsteady Reynolds-averaged Navie-Stokes (URANS) methods. An inlet temperature ...
Effect of Structural Redundancy on Progressive Collapse Resistance Enhancement in RC Frame Structures
Publisher: American Society of Civil Engineers
Abstract: Progressive collapse of building structures is a field of research that has received considerable attention all over the world. Moreover, the vulnerability of conventional reinforced concrete (RC) frame buildings to ...
Numerical Investigation of the Effect of Trailing Edge Thickness of Simulated Ceramic Matrix Composite Blades on Loss Profiles
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Ceramic matrix composite (CMC) is an enabling material allowing higher turbine inlet temperatures and possibly resulting in better thermal efficiency of gas turbine engines. This is because CMC layers with environmental ...
Numerical Investigation of Ash Deposition on Nozzle Guide Vane Endwalls
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A computational study was performed to determine the factors that affect ash deposition rates on the endwalls in a nozzle guide vane passage. Deposition tests were simulated in flow around a flat plate with a cylindrical ...
Challenges Associated With Replicating Rotor Blade Deposition in a Non-Rotating Annular Cascade
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A computational analysis is performed to determine if particulate impact events on the external surfaces of gas turbine engine rotor blades can be faithfully replicated in an experimental rotor cascade. The general electric ...
Large Eddy Simulation Analysis of Loss Anomaly of a Turbine Blade With Large Trailing Edge Radius
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: There is great interest in the usage of ceramic matrix composites (CMC) as a turbine blade material. However, depending on the manufacturing process of the CMC, blades may have a thicker trailing edge. The design space ...
Experimental Investigation of Innovative Cooling Schemes on an Additively Manufactured Engine Scale Turbine Nozzle Guide Vane
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This study includes the design, validation, and fabrication via direct metal laser sintering (DMLS) of a gas turbine nozzle guide vanes (NGV) that incorporates three innovative cooling schemes specifically enabled by ...