A5038476460- Fluid Dynamics and Turbulent Flows
- Wind and Air Flow Studies
- Aerodynamics and Acoustics in Jet Flows
- Fluid Dynamics and Vibration Analysis
- Computational Fluid Dynamics and Aerodynamics
- Wind Energy Research and Development
- Plasma and Flow Control in Aerodynamics
- Aerodynamics and Fluid Dynamics Research
- Particle Dynamics in Fluid Flows
- Heat Transfer Mechanisms
- Flow Measurement and Analysis
- Optical measurement and interference techniques
- Combustion and flame dynamics
- Aerospace and Aviation Technology
- Cyclone Separators and Fluid Dynamics
- Vibration and Dynamic Analysis
- Meteorological Phenomena and Simulations
- Tribology and Lubrication Engineering
- Gas Dynamics and Kinetic Theory
- Biomimetic flight and propulsion mechanisms
- Turbomachinery Performance and Optimization
- Structural Health Monitoring Techniques
- Textile materials and evaluations
- Rocket and propulsion systems research
- Advanced Sensor Technologies Research
University of Wyoming
2016-2025
Physical Sciences (United States)
2025
Wyoming Department of Education
2008-2024
Sandia National Laboratories California
2015
California Institute of Technology
2013
Search for Extraterrestrial Intelligence
2006
Ames Research Center
2000
Immunosciences Lab (United States)
1998
Pennsylvania State University
1989-1997
Langley Research Center
1992-1993
Abstract. Wind energy is foundational for achieving 100 % renewable electricity production, and significant innovation required as the grid expands accommodates hybrid plant systems, energy-intensive products such fuels, a transitioning transportation sector. The sizable investments wind power development integration make financial operational risks of change very high in all applications but especially offshore. Dependence on level modeling simulation accuracy to mitigate risk ensure...
Dynamic stall has been a technical challenge and fluid dynamical subject of interest for more than fifty years; but in the last decade significant advances have made understanding, prediction, modeling, control dynamic on rotors. This paper provides summary state art experiments future directions understanding Experimental data sets are discussed, as well direction research stall. Coordinated testing between airfoils rotating blades, close integration computational experimental studies were...
The skin-friction distribution on a wall-mounted hump model has been obtained using oil-film interferometry. This effort is part of larger study to provide validation cases for simulations unsteady flows. challenges interferometry this model, including curvature and close camera proximity, are discussed. Skin-friction measurements over most the especially high-quality in separated reattachment regions. These results highlight method’s ability capture wide range skin friction reverse-flow...
Researchers within the International Energy Agency (IEA) Task 31: Wakebench have created a framework for evaluation of wind farm flow models operating at microscale level.The consists model protocol integrated with web-based portal benchmarking (www.windbench.net).This paper provides an overview building-block validation approach applied to wake models, including best practices and data processing procedures datasets from SCADA meteorological databases.A hierarchy test cases has been...
Abstract. Wind energy is foundational for achieving 100 % renewable electricity production and significant innovation required as the grid expands accommodates hybrid plant systems, energy-intensive products such fuels, a transitioning transportation sector. The sizable investments wind power development integration make financial operational risks of change very high in all applications, but especially offshore. Dependence on level modeling simulation accuracy to mitigate risk ensure...
Compressible jets with various amounts of swirl and compressibility are investigated experimentally. The mixing-layer growth rate is obtained from time-averaged images the mixing layer using planar laser scattering (PLS) technique, quantified Doppler velocimetry intrusive probes. results conclusively demonstrate that addition to jet increases entrainment by up 60% compared a corresponding non-swirling case. Instantaneous PLS reveal modified turbulent structure in swirling-jet cases. In...
Incompressible swirling jets with Reynolds numbers of 1.0 × 10 5 have been studied using a miniature five-hole probe. The jet facility in which these measurements made has specifically designed to produce highly conditioned, flow. To provide comprehensive investigation the effect low-to-moderate swirl (well below vortex breakdown) on growth rate, two tangential velocity profiles, solid-body type and q-vortex both 0.10 0.23, investigated compared nonswirling
Theapplication of photogrammetry to the measurement skin friction using oil-film interferometry isdiscussed. Oil-film and are first described justify need for photogrammetry, then method is applied two flows. The results indicate that when model curvature high or camera-to-model distanceisshort,largeuncertainties(oftheorderof10%)inskinfrictioncanbeintroducedifphotogrammetryisnot applied. For most applications demanding high-accuracy skin-friction measurements, approaches such as those in...
The IEA Task 31 Wakebench is setting up a framework for the evaluation of wind farm flow models operating at microscale level.The consists on model protocol integrated web-based portal benchmarking (www.windbench.net).This paper provides an overview building-block validation approach applied to flow-over-terrain models, including best practices and data processing procedures analysis qualification datasets from resource assessment campaigns.A hierarchy test cases has been proposed...
In this work, we present Large Eddy Simulation (LES) results of atmospheric boundary layer (ABL) flow over complex terrain with neutral stratification using the OpenFOAM-based simulator for on/offshore wind farm applications (SOWFA). The complete work to investigate LES ABL real is described including meteorological-tower data analysis, mesh generation and case set-up. New conditions lateral top boundaries are developed validated allow inflow outflow as required in simulations. turbulent...
This study considers the development and evolution of swirling turbulent wake their link to turbulence present in wake. A generator produces wakes with a minimum artifacts that would complicate flow. Four have been studied swirl numbers ranging from 0.19 0.37, results are compared those nonswirling Two-component laser-Doppler anemometry has used measure mean quantities wake, uncertainty these determined. Careful alignment system large independent samples were obtain second-order statistics...
The far field of an incompressible swirling jet has been studied using two-component laser Doppler anemometry. Three pairs symmetric injectors were used to produce weak-to-moderate jets. Velocity profiles the mean and fluctuating streamwise azimuthal velocity components measured in jets with two swirl numbers (S = 0.15 0.25) at axial locations up 50 exit diameters. turbulence intensity profiles, centerline decay, growth rates for the various have compared those obtained same facility...
Experiments were conducted to determine the ability of Wiener deconvolution method reconstruct an unsteady surface pressure on a pitch-oscillating airfoil using remotely sensed signal. The method’s signals distorted through attenuation and resonance effects examined for different lengths 0.86mm diameter tubing. Five tubing (30 cm 152 cm) tested in bench-top setting. In addition, real port geometries considered ports section. Finally, was used estimate time-dependent while oscillated pitch at...
This investigation identifies and characterizes the changes in near wake of a bluff body produced by boundary-layer thickening, which, turn, result an overall reduction base drag. For this study, wedge flat-plate models with both smooth rough forebody surfaces were used. The surface roughness on was increased to modify/thicken boundary layer. Hot-wire surveys carried out characterize state ahead separation point, base-pressure measurements used quantify base-drag associated modification. In...
Stall flutter is an aeroelastic phenomenon resulting in unwanted oscillatory loads on the blade, such as wind turbine helicopter rotor and other flexible wing blades. Although stall related control have been studied theoretically experimentally, microtab of asymmetric limit cycle oscillations (LCOs) cases has not generally investigated. This paper presents aeroservoelastic model to study blade section undergoing moderate deep separately. The effects different dynamic conditions consequent...
Two different inverse design approaches are proposed for developing wind turbine blades sub-scale wake testing. In the first approach, dimensionless circulation is matched full scale and equal shed vorticity in wake. second normalized normal tangential force distributions large small blades, as these forces determine dynamics stability. The two applied same target blade, shape of compared. results show that have been successfully implemented, designed able to produce distributions.