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Trailing vortex instability and its implications for aerial spraying
Authors: B. Panneton and A.M. Drummond
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Download file: https://library.csbe-scgab.ca/docs/journal/35/35_1_17_ocr.pdf
Published in: CBE Journal » CBE Journal Volume 35 (1993)
Download RAW file: https://library.csbe-scgab.ca/docs/journal/35/35_1_17_raw.pdf
DOI:
Description: Data on the stability ofthe trailing vortex system shed by a small, clean aircraft cruising in ground effect are presented for a flight speed of 57 m/s at altitudes varying between 2.8 and 19.2m over flat terrain. The aircraft used during the experiments, a Harvard Mark IV, closely simulates the vortex strength and wing span of a Cessna Agtruck. In all of the 46 flights analyzed, the vortices were observed to decay by core bursting following asymmetric, sinuous motion without exhibiting any tendency to link. In an early series of tests, the port vortex was always observed to burst first, most prob ably because of a small antenna mounted near the wing tip. Upon removal of the antenna, neither vortex consistently burst first. Also, a ground marker used for some tests was found to induce early burstingwhen it interacted with the downwind member of the vortex pair.The time-to-burstwascorrelated with the atmosphericturbulent dissipation rate and the results agreed well with other experimental data and with the predictions of a model. It was observed that each vortex became extinct after core bursting within an 18 s time interval. The implications of these results for aerial spraying are discussed.
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Mots-clés:
Citation: B. Panneton and A.M. Drummond 1993. TRAILING VORTEX INSTABILITY AND ITS IMPLICATIONS FOR AERIAL SPRAYING. Canadian Agricultural Engineering 35(1):17-25.
Volume: 35
Issue: 1
Pages -
Contributor:
Date: 1993
Technical field:
Conference name:
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Type: Text.Article
Format: PDF
Publication type:
Source:
Relation:
Coverage: Canada
Language 1: en
Language 2:
Rights: Canadian Society for Bioengineering
Notes:
Other files:
DOI:
Description: Data on the stability ofthe trailing vortex system shed by a small, clean aircraft cruising in ground effect are presented for a flight speed of 57 m/s at altitudes varying between 2.8 and 19.2m over flat terrain. The aircraft used during the experiments, a Harvard Mark IV, closely simulates the vortex strength and wing span of a Cessna Agtruck. In all of the 46 flights analyzed, the vortices were observed to decay by core bursting following asymmetric, sinuous motion without exhibiting any tendency to link. In an early series of tests, the port vortex was always observed to burst first, most prob ably because of a small antenna mounted near the wing tip. Upon removal of the antenna, neither vortex consistently burst first. Also, a ground marker used for some tests was found to induce early burstingwhen it interacted with the downwind member of the vortex pair.The time-to-burstwascorrelated with the atmosphericturbulent dissipation rate and the results agreed well with other experimental data and with the predictions of a model. It was observed that each vortex became extinct after core bursting within an 18 s time interval. The implications of these results for aerial spraying are discussed.
Keywords:
Résumé:
Mots-clés:
Citation: B. Panneton and A.M. Drummond 1993. TRAILING VORTEX INSTABILITY AND ITS IMPLICATIONS FOR AERIAL SPRAYING. Canadian Agricultural Engineering 35(1):17-25.
Volume: 35
Issue: 1
Pages -
Contributor:
Date: 1993
Technical field:
Conference name:
Session name:
Other information:
Type: Text.Article
Format: PDF
Publication type:
Source:
Relation:
Coverage: Canada
Language 1: en
Language 2:
Rights: Canadian Society for Bioengineering
Notes:
Other files:
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