A mm-Scale Aeroelastic Oscillation-Based Anemometer
By combining the aeroelastic and vortex-forced flutter modes of a thin plastic strip, its oscillation frequency can be confined to scale monotonically with fluid velocity. This principle has been used to produce a low-cost, mm-scale anemometer that measures air speed to ±(5% + 0.5m/s) from 1–18m/s....
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| Format: | Article |
| Language: | en_US |
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ASME International
2014
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| Online Access: | http://hdl.handle.net/1721.1/85580 |
| _version_ | 1811076840373092352 |
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| author | McKay, Ian |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering McKay, Ian |
| author_sort | McKay, Ian |
| collection | MIT |
| description | By combining the aeroelastic and vortex-forced flutter modes of a thin plastic strip, its oscillation frequency can be confined to scale monotonically with fluid velocity. This principle has been used to produce a low-cost, mm-scale anemometer that measures air speed to ±(5% + 0.5m/s) from 1–18m/s. The device uses a 2mm slot-type photointerrupt detector to monitor the fundamental frequency of a 7μm thick Kapton strip suspended parallel to air flow. This paper describes the prototype and three of the experiments that informed its design. These investigated the effect of a bluff body on flutter onset velocity, the effect of filament geometry on bending position, and the effect of the superposition of the vortex-forced and aeroelastic flutter modes on discretely-measured flutter frequency. The experiments demonstrate that a trapezoidal filament in the wake of a similarly-sized bluff body is well-suited for this novel flow measurement strategy. |
| first_indexed | 2024-09-23T10:28:46Z |
| format | Article |
| id | mit-1721.1/85580 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:28:46Z |
| publishDate | 2014 |
| publisher | ASME International |
| record_format | dspace |
| spelling | mit-1721.1/855802022-09-27T09:41:41Z A mm-Scale Aeroelastic Oscillation-Based Anemometer McKay, Ian Massachusetts Institute of Technology. Department of Mechanical Engineering McKay, Ian By combining the aeroelastic and vortex-forced flutter modes of a thin plastic strip, its oscillation frequency can be confined to scale monotonically with fluid velocity. This principle has been used to produce a low-cost, mm-scale anemometer that measures air speed to ±(5% + 0.5m/s) from 1–18m/s. The device uses a 2mm slot-type photointerrupt detector to monitor the fundamental frequency of a 7μm thick Kapton strip suspended parallel to air flow. This paper describes the prototype and three of the experiments that informed its design. These investigated the effect of a bluff body on flutter onset velocity, the effect of filament geometry on bending position, and the effect of the superposition of the vortex-forced and aeroelastic flutter modes on discretely-measured flutter frequency. The experiments demonstrate that a trapezoidal filament in the wake of a similarly-sized bluff body is well-suited for this novel flow measurement strategy. 2014-03-10T17:28:54Z 2014-03-10T17:28:54Z 2012-11 Article http://purl.org/eprint/type/ConferencePaper 978-0-7918-4523-3 http://hdl.handle.net/1721.1/85580 McKay, Ian. “A Mm-Scale Aeroelastic Oscillation-Based Anemometer.” ASME 2012 International Mechanical Engineering Congress and Exposition. Volume 7: Fluids and Heat Transfer, Parts A, B, C, and D (November 9, 2012). en_US http://dx.doi.org/10.1115/IMECE2012-93081 Proceedings of the ASME 2012 International Mechanical Engineering Congress and Exposition. Volume 7: Fluids and Heat Transfer, Parts A, B, C, and D Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf ASME International Ian McKay |
| spellingShingle | McKay, Ian A mm-Scale Aeroelastic Oscillation-Based Anemometer |
| title | A mm-Scale Aeroelastic Oscillation-Based Anemometer |
| title_full | A mm-Scale Aeroelastic Oscillation-Based Anemometer |
| title_fullStr | A mm-Scale Aeroelastic Oscillation-Based Anemometer |
| title_full_unstemmed | A mm-Scale Aeroelastic Oscillation-Based Anemometer |
| title_short | A mm-Scale Aeroelastic Oscillation-Based Anemometer |
| title_sort | mm scale aeroelastic oscillation based anemometer |
| url | http://hdl.handle.net/1721.1/85580 |
| work_keys_str_mv | AT mckayian ammscaleaeroelasticoscillationbasedanemometer AT mckayian mmscaleaeroelasticoscillationbasedanemometer |