skip to main content

DOE PAGESDOE PAGES

Title: Enrichment methods for inflow turbulence generation in the atmospheric boundary layer

Here, we investigate the feasibility of introducing synthetic turbulence into finite-domain large-eddy simulations (LES) of the wind plant operating environment. This effort is motivated by the need for a robust mesoscale-to-microscale coupling strategy in which a microscale (wind plant) simulation is driven by mesoscale data without any resolved microscale turbulence. A neutrally stratified atmospheric boundary layer was simulated in an LES with 10-m grid spacing. We show how such a fully developed turbulence field may be reproduced with spectral enrichment starting from an under-resolved coarse LES field (with 20-m and 40-m grid spacing). The velocity spectra of the under-resolved fields are enriched by superimposing a fluctuating velocity field calculated by two turbulence simulators: TurbSim and Gabor Kinematic Simulation. Both forms of enrichment accurately simulated the autospectra of all three velocity components at high wavenumbers, with agreement between the enriched fields and the full-resolution LES observed at 400 m from the inflow boundary. In contrast, the spectra of the unenriched fields reached the same fully developed state at four times the downstream distance.
Authors:
 [1] ;  [2] ;  [2]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  2. Stanford Univ., Stanford, CA (United States)
Publication Date:
Report Number(s):
NREL/JA-5000-71378
Journal ID: ISSN 1742-6588
Grant/Contract Number:
AC36-08GO28308
Type:
Accepted Manuscript
Journal Name:
Journal of Physics. Conference Series
Additional Journal Information:
Journal Volume: 1037; Journal ID: ISSN 1742-6588
Publisher:
IOP Publishing
Research Org:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Country of Publication:
United States
Language:
English
Subject:
17 WIND ENERGY; 42 ENGINEERING; atmospheric boundary layer; kinematics; large eddy simulation; torque; turbulence; velocity
OSTI Identifier:
1462467

Quon, Eliot W., Ghate, Aditya S., and Lele, Sanjiva K.. Enrichment methods for inflow turbulence generation in the atmospheric boundary layer. United States: N. p., Web. doi:10.1088/1742-6596/1037/7/072054.
Quon, Eliot W., Ghate, Aditya S., & Lele, Sanjiva K.. Enrichment methods for inflow turbulence generation in the atmospheric boundary layer. United States. doi:10.1088/1742-6596/1037/7/072054.
Quon, Eliot W., Ghate, Aditya S., and Lele, Sanjiva K.. 2018. "Enrichment methods for inflow turbulence generation in the atmospheric boundary layer". United States. doi:10.1088/1742-6596/1037/7/072054. https://www.osti.gov/servlets/purl/1462467.
@article{osti_1462467,
title = {Enrichment methods for inflow turbulence generation in the atmospheric boundary layer},
author = {Quon, Eliot W. and Ghate, Aditya S. and Lele, Sanjiva K.},
abstractNote = {Here, we investigate the feasibility of introducing synthetic turbulence into finite-domain large-eddy simulations (LES) of the wind plant operating environment. This effort is motivated by the need for a robust mesoscale-to-microscale coupling strategy in which a microscale (wind plant) simulation is driven by mesoscale data without any resolved microscale turbulence. A neutrally stratified atmospheric boundary layer was simulated in an LES with 10-m grid spacing. We show how such a fully developed turbulence field may be reproduced with spectral enrichment starting from an under-resolved coarse LES field (with 20-m and 40-m grid spacing). The velocity spectra of the under-resolved fields are enriched by superimposing a fluctuating velocity field calculated by two turbulence simulators: TurbSim and Gabor Kinematic Simulation. Both forms of enrichment accurately simulated the autospectra of all three velocity components at high wavenumbers, with agreement between the enriched fields and the full-resolution LES observed at 400 m from the inflow boundary. In contrast, the spectra of the unenriched fields reached the same fully developed state at four times the downstream distance.},
doi = {10.1088/1742-6596/1037/7/072054},
journal = {Journal of Physics. Conference Series},
number = ,
volume = 1037,
place = {United States},
year = {2018},
month = {6}
}