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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 ...
Modeling Deposition in Gas Turbines With Conjugate Mesh-Morphing and Temperature Sensitivity
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Abstract. A versatile procedure is presented for simulating the growth and thermal impact of deposition in representative gas turbine cooling circuits. The methodology comprises the following sequence: (1) employ computational ...
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 ...
The Effect of Training Data on Predicting Turbulent Flow Through a Linear Cascade Using Physics-Informed Neural Networks
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Abstract. This article investigates the effect of training data on the accuracy of turbulent flow predictions in the wake region of a linear turbine cascade using physics-informed neural networks (PINNs). While it is well ...
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 ...
Electrostatic Effects on Airborne Particle Deposition in Gas Turbine Engines
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Abstract. The effects of electrostatics on the deposition of 0–5 µm Arizona Road Dust within a gas turbine hot section were studied. These experiments focused on different cooling methods found in turbine components: ...
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. ...