Revisiting wind speed measurements using actively heated fiber optics: a wind tunnel study
<p>Near-surface wind speed is typically only measured by point observations. The actively heated fiber-optic (AHFO) technique, however, has the potential to provide high-resolution distributed observations of wind speeds, allowing for better spatial characterization of fine-scale processes. Be...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2020-10-01
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| Series: | Atmospheric Measurement Techniques |
| Online Access: | https://amt.copernicus.org/articles/13/5423/2020/amt-13-5423-2020.pdf |
| _version_ | 1818541467799388160 |
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| author | J. G. V. van Ramshorst J. G. V. van Ramshorst M. Coenders-Gerrits B. Schilperoort B. J. H. van de Wiel J. G. Izett J. S. Selker C. W. Higgins H. H. G. Savenije N. C. van de Giesen |
| author_facet | J. G. V. van Ramshorst J. G. V. van Ramshorst M. Coenders-Gerrits B. Schilperoort B. J. H. van de Wiel J. G. Izett J. S. Selker C. W. Higgins H. H. G. Savenije N. C. van de Giesen |
| author_sort | J. G. V. van Ramshorst |
| collection | DOAJ |
| description | <p>Near-surface wind speed is typically only measured by point observations. The actively heated fiber-optic (AHFO) technique, however, has the
potential to provide high-resolution distributed observations of wind speeds, allowing for better spatial characterization of fine-scale
processes. Before AHFO can be widely used, its performance needs to be tested in a range of settings. In this work, experimental results on this
novel observational wind-probing technique are presented. We utilized a controlled wind tunnel setup to assess both the accuracy and the precision
of AHFO under a range of operational conditions (wind speed, angles of attack and temperature difference). The technique allows for wind speed
characterization with a spatial resolution of 0.3 <span class="inline-formula">m</span> on a 1 <span class="inline-formula">s</span> timescale. The flow in the wind tunnel was varied in a controlled
manner such that the mean wind ranged between 1 and 17 <span class="inline-formula">m s<sup>−1</sup></span>. The AHFO measurements are compared to sonic anemometer measurements and
show a high coefficient of determination (0.92–0.96) for all individual angles, after correcting the AHFO measurements for the angle of
attack. Both the precision and accuracy of the AHFO measurements were also greater than 95 % for all conditions. We conclude that AHFO has the
potential to measure wind speed, and we present a method to help choose the heating settings of AHFO. AHFO allows for the characterization of
spatially varying fields of mean wind. In the future, the technique could potentially be combined with conventional distributed temperature sensing
(DTS) for sensible heat flux estimation in micrometeorological and hydrological applications.</p> |
| first_indexed | 2024-12-11T22:09:40Z |
| format | Article |
| id | doaj.art-c0adb98ef2ca4b93b46584dd1ae3ab0c |
| institution | Directory Open Access Journal |
| issn | 1867-1381 1867-8548 |
| language | English |
| last_indexed | 2024-12-11T22:09:40Z |
| publishDate | 2020-10-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Measurement Techniques |
| spelling | doaj.art-c0adb98ef2ca4b93b46584dd1ae3ab0c2022-12-22T00:48:50ZengCopernicus PublicationsAtmospheric Measurement Techniques1867-13811867-85482020-10-01135423543910.5194/amt-13-5423-2020Revisiting wind speed measurements using actively heated fiber optics: a wind tunnel studyJ. G. V. van Ramshorst0J. G. V. van Ramshorst1M. Coenders-Gerrits2B. Schilperoort3B. J. H. van de Wiel4J. G. Izett5J. S. Selker6C. W. Higgins7H. H. G. Savenije8N. C. van de Giesen9Water Resources Section, Delft University of Technology, Stevinweg 1, 2628 CN Delft, the NetherlandsBioclimatology, University of Göttingen, Büsgenweg 2, 37077 Göttingen, GermanyWater Resources Section, Delft University of Technology, Stevinweg 1, 2628 CN Delft, the NetherlandsWater Resources Section, Delft University of Technology, Stevinweg 1, 2628 CN Delft, the NetherlandsGeoscience and Remote Sensing, Delft University of Technology, Stevinweg 1, 2628 CN Delft, the NetherlandsGeoscience and Remote Sensing, Delft University of Technology, Stevinweg 1, 2628 CN Delft, the NetherlandsBiological and Ecological Engineering, Oregon State University, 116 Gilmore Hall, Corvallis, Oregon 97331, USABiological and Ecological Engineering, Oregon State University, 116 Gilmore Hall, Corvallis, Oregon 97331, USAWater Resources Section, Delft University of Technology, Stevinweg 1, 2628 CN Delft, the NetherlandsWater Resources Section, Delft University of Technology, Stevinweg 1, 2628 CN Delft, the Netherlands<p>Near-surface wind speed is typically only measured by point observations. The actively heated fiber-optic (AHFO) technique, however, has the potential to provide high-resolution distributed observations of wind speeds, allowing for better spatial characterization of fine-scale processes. Before AHFO can be widely used, its performance needs to be tested in a range of settings. In this work, experimental results on this novel observational wind-probing technique are presented. We utilized a controlled wind tunnel setup to assess both the accuracy and the precision of AHFO under a range of operational conditions (wind speed, angles of attack and temperature difference). The technique allows for wind speed characterization with a spatial resolution of 0.3 <span class="inline-formula">m</span> on a 1 <span class="inline-formula">s</span> timescale. The flow in the wind tunnel was varied in a controlled manner such that the mean wind ranged between 1 and 17 <span class="inline-formula">m s<sup>−1</sup></span>. The AHFO measurements are compared to sonic anemometer measurements and show a high coefficient of determination (0.92–0.96) for all individual angles, after correcting the AHFO measurements for the angle of attack. Both the precision and accuracy of the AHFO measurements were also greater than 95 % for all conditions. We conclude that AHFO has the potential to measure wind speed, and we present a method to help choose the heating settings of AHFO. AHFO allows for the characterization of spatially varying fields of mean wind. In the future, the technique could potentially be combined with conventional distributed temperature sensing (DTS) for sensible heat flux estimation in micrometeorological and hydrological applications.</p>https://amt.copernicus.org/articles/13/5423/2020/amt-13-5423-2020.pdf |
| spellingShingle | J. G. V. van Ramshorst J. G. V. van Ramshorst M. Coenders-Gerrits B. Schilperoort B. J. H. van de Wiel J. G. Izett J. S. Selker C. W. Higgins H. H. G. Savenije N. C. van de Giesen Revisiting wind speed measurements using actively heated fiber optics: a wind tunnel study Atmospheric Measurement Techniques |
| title | Revisiting wind speed measurements using actively heated fiber optics: a wind tunnel study |
| title_full | Revisiting wind speed measurements using actively heated fiber optics: a wind tunnel study |
| title_fullStr | Revisiting wind speed measurements using actively heated fiber optics: a wind tunnel study |
| title_full_unstemmed | Revisiting wind speed measurements using actively heated fiber optics: a wind tunnel study |
| title_short | Revisiting wind speed measurements using actively heated fiber optics: a wind tunnel study |
| title_sort | revisiting wind speed measurements using actively heated fiber optics a wind tunnel study |
| url | https://amt.copernicus.org/articles/13/5423/2020/amt-13-5423-2020.pdf |
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