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  4. 2D VAR Single Doppler Lidar Vector Retrieval and its Application in Offshore Wind Energy
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2D VAR Single Doppler Lidar Vector Retrieval and its Application in Offshore Wind Energy

Full metadata

Description

Remote sensors like Doppler lidars can map the winds with high accuracy and spatial resolution. One shortcoming of lidars is that the radial velocity measured by the lidar does not give a complete picture of the windfield necessitating additional data processing to reconstruct the windfield. Most of the popular vector retrieval algorithms rely on the homogenous wind field assumption which plays a vital role in reducing the indeterminacy of the inverse problem of obtaining Cartesian velocity from radial velocity measurements. Consequently, these methods fail in situations where the flow is heterogeneous e.g., Turbine wakes. Alternate methods are based either on statistical models (e.g., optimal interpolation [1]) or computationally intensive four dimensional variational methods [2]. This study deals with a 2D variational vector retrieval for Doppler lidar that uses the radial velocity advection equation as an additional constraint along with a tangential velocity constraint derived from a new formulation with gradients of radial velocity. The retrieval was applied on lidar data from a wind farm and preliminary analysis revealed that the algorithm was able to retrieve the mean wind field while preserving the small scale flow structure.

Date Created
2017-10
Contributors
  • Cherukuru, Nihanth (Author)
  • Calhoun, Ronald (Author)
  • Krishnamurthy, Raghavendra (Author)
  • Benny, Svardal (Author)
  • Reuder, Joachim (Author)
  • Flugge, Martin (Author)
  • Ira A. Fulton Schools of Engineering (Contributor)
Resource Type
Text
Extent
8 pages
Language
eng
Copyright Statement
In Copyright
Reuse Permissions
Attribution-NonCommercial-NoDerivs
Primary Member of
ASU Scholarship Showcase
Identifier
Digital object identifier: 10.1016/j.egypro.2017.10.378
Identifier Type
International standard serial number
Identifier Value
1876-6102
Peer-reviewed
No
Open Access
No
Series
ENERGY PROCEDIA
Handle
https://hdl.handle.net/2286/R.I.46129
Preferred Citation

Cherukuru, N. W., Calhoun, R., Krishnamurthy, R., Benny, S., Reuder, J., & Flügge, M. (2017). 2D VAR single Doppler lidar vector retrieval and its application in offshore wind energy. Energy Procedia, 137, 497-504. doi:10.1016/j.egypro.2017.10.378

Level of coding
minimal
Cataloging Standards
asu1
System Created
  • 2018-01-29 02:36:36
System Modified
  • 2021-10-22 04:09:12
  •     
  • 1 year 3 months ago
Additional Formats
  • OAI Dublin Core
  • MODS XML

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