A5034860616- Wind Energy Research and Development
- Wind and Air Flow Studies
- Fluid Dynamics and Vibration Analysis
- Turbomachinery Performance and Optimization
- Fluid Dynamics and Turbulent Flows
- Aerodynamics and Fluid Dynamics Research
- Icing and De-icing Technologies
- Simulation Techniques and Applications
- Probabilistic and Robust Engineering Design
- Wind Turbine Control Systems
- Meteorological Phenomena and Simulations
- Advanced Aircraft Design and Technologies
- Manufacturing Process and Optimization
- Computational Fluid Dynamics and Aerodynamics
- Additive Manufacturing Materials and Processes
- Aerospace and Aviation Technology
- Fault Detection and Control Systems
- Remote Sensing and LiDAR Applications
- Real-time simulation and control systems
- Structural Health Monitoring Techniques
- Additive Manufacturing and 3D Printing Technologies
- Surface Roughness and Optical Measurements
- Soil erosion and sediment transport
- Energy Load and Power Forecasting
- Aerodynamics and Acoustics in Jet Flows
Sandia National Laboratories
2016-2025
Sandia National Laboratories California
2014-2024
Honeywell (United States)
2020
National Nuclear Security Administration
2020
Saint Anthony College of Nursing
2018
University of Minnesota
2018
University of California, Davis
2013
Pennsylvania State University
2007-2012
High-resolution lidar wake measurements are part of an ongoing field campaign being conducted at the Scaled Wind Farm Technology facility by Sandia National Laboratories and Renewable Energy Laboratory using a customized scanning from Technical University Denmark. One primary objectives is to collect experimental data improve predictive capability wind plant computational models represent response turbine varying inflow conditions operating states. The present work summarizes setup...
In the past decade wind energy installations have increased exponentially driven by reducing cost from technology innovation and favorable governmental policy. Modern turbines are highly efficient, capturing close to theoretical limit of available in rotor diameter. Therefore, continue reduce through a broadening scope individual complex interaction within farm is needed. Some estimates show that 10 40% lost due underperformance turbine-turbine interaction. The US Department Energy has...
Leading edge erosion and roughness accumulation is an issue observed with great variability by wind plant operators, but little understanding of the effect on turbine performance. In tunnels, airfoil models are typically tested standard grit trip tape to simulate effects in field operation, there a lack established relation between measurements tunnel test conditions. A research collaboration lab, academic, industry partners has sought establish method estimate blades that correlates...
In previous work, comparisons were made between large-scale simulations of the American Wake ExperimeNt (AWAKEN) wind farms conducted using large-eddy simulation (LES) codes Nalu-Wind and Adaptive Mesh Refinement-Wind, engineering farm model FLOw Redirection Induction in Steady State (FLORIS), multi-scale Weather Research Forecasting model. Significant discrepancies observed modeled wake deficits, present paper investigates sources this variability new with single turbines smaller domains....
We present wind tunnel and numerical experiments of the flow behind a model turbine in optimal sub-optimal regimes. Spatio-temporal filtering dynamic mode decomposition reveal that onset amplitude wake meandering are affected by both operating regime nacelle.
Advances in wind-plant control have often focused on more effectively balancing power between neighboring turbines. Wake steering is one such method that provides control-based improvements a quasi-static way, but this does little to fundamentally change the wake recovery process, and thus, it has limited potential. This study investigates use of another paradigm known as dynamic (DWC) excite mutual inductance instability adjacent tip-vortex structures, thereby accelerating breakdown...
Abstract Technology development and design decisions in wind energy are often based on results from simulations performed for individual turbines or entire plants. It is therefore critical to ensure that the models being used research industry applications be thoroughly validated against measurements. A full-system validation of plant must consider atmospheric inflow, response turbines, their wakes. This task complicated by lack freely available, quality-controlled, high-quality Here, such...
Wind farm operators observe power production decay over time, with the exact cause unknown and difficult to quantify. A likely explanation is blade surface roughness, as wind turbines are continuously subjected environmental hazards. Difficulty arises in understanding quantifying performance degradation. Historically, turbine airfoil families were designed for lift be insensitive roughness by simulating 2D trip strips. Despite this, still shown negatively affect performance. Experiments have...
A surface roughness model extending the Langtry-Menter transition has been implemented in a RANS framework. The model, originally proposed by Dassler, Kozulovic, and Fiala, introduces an additional scalar field amplification quantity. This value is explicitly set at rough wall boundaries using parameters local flow quantities. transport equation allows non-local effects of to be accounted for downstream sections. variable coupled with used modify criteria transition. Results from flat plate...
View Video Presentation: https://doi.org/10.2514/6.2023-0969.vid This paper describes the methodology of designing a replacement blade tip and winglet for wind turbine to demonstrate potential additive-manufacturing energy. The team will later field-demonstrate this additive-manufactured, system-integrated (AMSIT) on turbine. aims reduce cost energy by improving aerodynamic performance reliability, while reducing transportation costs. focuses design modeling increased power production...
Abstract Towards the ongoing work of improving capability flow modeling within and around wind plants, an onshore model validation benchmark campaign is underway based on a field experiment involving multiple plants in Oklahoma, U.S.A. Dual-Doppler radar being leveraged to provide flowfield information for benchmarking owing unparalleled such capture minute-by-minute horizontal fields over scale tens kilometers. However, dual-Doppler exhibits sampling artifacts that must be considered during...
In this study, we consider the impact of large-scale, convective structures in an unstable atmospheric boundary layer on wind turbine wakes. Simulation data from a high-fidelity large-eddy simulation (LES) AWAKEN farm site matching conditions were analyzed, and both performance wake behavior affected based their location relative to structures. Turbines located updraft regions flow experienced lower inflow velocity generated less power, but wakes observed recover faster saw greater turbulent...
Over time it has been reported wind turbine power output can diminish below manufacturers promised levels. This is clearly undesirable from an operator standpoint, and also put pressure on companies to make up the difference. A likely explanation for discrepancy in contamination of leading edge due environmental conditions creating surfaces much coarser than intended. To examine effects airfoil roughness, a comprehensive study performed both experimentally computationally NACA 633 − 418...
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.
View Video Presentation: https://doi.org/10.2514/6.2021-1182.vid Advances in wind plant control have often focused on more effectively balancing power between neighboring turbines. Wake steering is one such method that provides control-based improvements a quasi-static way, but this fundamentally does not change the downstream wake deficit and thus, can only provide limited improvement. Another paradigm to leverage turbine as flow actuator dynamically excite unstable modes wake, thereby...
Abstract Many factors that influence the effect of leading edge erosion on annual energy production are uncertain, such as time to initiation, damage growth rate, blade design, operational conditions, and atmospheric conditions. In this work, we explore how uncertain parameters drive impact wind turbine power performance using a combination uncertainty quantification modelling tools, at both low medium fidelity. Results will include predicted several example plant sites for representative...