| DOI | Resolve DOI: https://doi.org/10.1364/OL.416121 |
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| Author | Search for: Fan, Luming1ORCID identifier: https://orcid.org/0000-0002-9856-4853; Search for: Vena, Patrizio1; Search for: Savard, Bruno; Search for: Xuan, Guangtao1; Search for: Fond, BenoîtORCID identifier: https://orcid.org/0000-0002-8152-4126 |
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| Affiliation | - National Research Council of Canada. Aerospace
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| Funder | Search for: National Research Council of Canada |
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| Format | Text, Letter |
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| Abstract | This Letter introduces a new, to the best of our knowledge, particle streak velocimetry technique based on decaying streaks formed by individual phosphor particles following pulsed excitation. Tin-doped phosphor particles are dispersed into flows and excited by a pulsed UV laser light sheet. Emission streaks are recorded as a result of particle motion during the persistence of luminescence (here ∼27µs). The two components of the flow velocity are derived from the streaks without directional ambiguity by applying to each streak a two-dimensional fit describing a linearly moving point source with a mono-exponential decaying emission. This technique can achieve high spatial resolution compared to particle image velocimetry (PIV), while also requiring much fewer computational resources than particle tracking velocimetry (PTV) at high seeding densities. The wavelength-shifted luminescence also allows rejection of reflected laser light. The approach was validated in a free jet against simultaneous PTV and PIV and then successfully applied to measure a canonical boundary layer flow. |
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| Publication date | 2021-01-07 |
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| Publisher | Optica Publishing Group |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | a8d987c4-1dbe-4bc2-a69f-604540475278 |
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| Record created | 2023-01-19 |
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| Record modified | 2023-03-16 |
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