Angular response of hot wire probes
A new equation for the convective heat loss from the sensor of a hot-wire probe is derived which accounts for both the potential and the viscous parts of the flow past the prongs. The convective heat loss from the sensor is related to the far-field velocity by an expression containing a term represe...
| Main Authors: | , , |
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| Format: | Journal article |
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IOP Publishing
2017
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| _version_ | 1797051060287700992 |
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| author | Di Mare, L Jelly, T Day, I |
| author_facet | Di Mare, L Jelly, T Day, I |
| author_sort | Di Mare, L |
| collection | OXFORD |
| description | A new equation for the convective heat loss from the sensor of a hot-wire probe is derived which accounts for both the potential and the viscous parts of the flow past the prongs. The convective heat loss from the sensor is related to the far-field velocity by an expression containing a term representing the potential flow around the prongs, and a term representing their viscous effect. This latter term is absent in the response equations available in the literature but is essential in representing some features of the observed response of miniature hot-wire probes. The response equation contains only four parameters but it can reproduce, with great accuracy, the behaviour of commonly used single-wire probes. The response equation simplifies the calibration the angular response of rotated slanted hot-wire probes: only standard King's law parameters and a Reynolds-dependent drag coefficient need to be determined. |
| first_indexed | 2024-03-06T18:14:27Z |
| format | Journal article |
| id | oxford-uuid:0422ed93-b4af-4e39-b21e-a0c793fd11dd |
| institution | University of Oxford |
| last_indexed | 2024-03-06T18:14:27Z |
| publishDate | 2017 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | oxford-uuid:0422ed93-b4af-4e39-b21e-a0c793fd11dd2022-03-26T08:50:07ZAngular response of hot wire probesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:0422ed93-b4af-4e39-b21e-a0c793fd11ddSymplectic Elements at OxfordIOP Publishing2017Di Mare, LJelly, TDay, IA new equation for the convective heat loss from the sensor of a hot-wire probe is derived which accounts for both the potential and the viscous parts of the flow past the prongs. The convective heat loss from the sensor is related to the far-field velocity by an expression containing a term representing the potential flow around the prongs, and a term representing their viscous effect. This latter term is absent in the response equations available in the literature but is essential in representing some features of the observed response of miniature hot-wire probes. The response equation contains only four parameters but it can reproduce, with great accuracy, the behaviour of commonly used single-wire probes. The response equation simplifies the calibration the angular response of rotated slanted hot-wire probes: only standard King's law parameters and a Reynolds-dependent drag coefficient need to be determined. |
| spellingShingle | Di Mare, L Jelly, T Day, I Angular response of hot wire probes |
| title | Angular response of hot wire probes |
| title_full | Angular response of hot wire probes |
| title_fullStr | Angular response of hot wire probes |
| title_full_unstemmed | Angular response of hot wire probes |
| title_short | Angular response of hot wire probes |
| title_sort | angular response of hot wire probes |
| work_keys_str_mv | AT dimarel angularresponseofhotwireprobes AT jellyt angularresponseofhotwireprobes AT dayi angularresponseofhotwireprobes |