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RISAn Improved Particle Impact Model by Accounting for Rate of Strain and Stochastic Rebound
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A methodology for informing physics-based impact and deposition models through the use of novel experimental and analysis techniques is presented. Coefficient of restitution (CoR) data were obtained for Arizona Road Dust ...
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 ...
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 ...
A Global Approach to Turbomachinery Flow Control: Passage Vortex Control
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A flow control scheme was implemented in a lowpressure turbine cascade that simultaneously mitigated profile and endwall losses using midspan vortex generator jets (VGJs) and endwall suction. The combined system had an ...
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 ...
Experimental Investigation of Sweeping Jet Film Cooling in a Transonic Turbine Cascade
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The sweeping jet (SJ) film cooling hole has shown promising cooling performance compared to the standard shaped hole in low-speed conditions. The present work demonstrates the first attempt of SJ film cooling at an engine ...
A Simplified Injection Model for Variable Area Turbine Fluidic Throttling
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Previous studies have demonstrated the effectiveness of using fluidic actuators to throttle the flow through a nozzle guide vane, enabling a variable area turbine (VAT) with no moving parts. A simplified model was developed ...
Parametric Optimization of Unsteady End Wall Blowing on a Highly Loaded Low Pressure Turbine
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Efforts to reduce blade count and avoid boundary layer separation have led to lowpressure turbine airfoils with significant increases in loading as well as frontloaded pressure distributions. These features have been ...
The Effect of Freestream Turbulence on Deposition for Nozzle Guide Vanes
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An evaluation of the effect of freestream turbulence intensity on the rate of deposit accumulation for nozzle guide vanes (NGVs) was performed using the turbine reacting flow rig (TuRFR) accelerated deposition facility. ...
The Effect of Acoustic Excitation on Boundary Layer Separation of a Highly Loaded LPT Blade
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An experimental investigation of the effect of acoustic excitation on the boundary layer development of a highly loaded lowpressure turbine blade at lowReynolds number is investigated. The aim of this work is to study the ...