Thermographic laser Doppler velocimetry

Ojo, Anthony O.; Fond, Benoit; Van Wachem, Berend G. M.; Heyes, Andrew L.; Beyrau, Frank

Abstract

We propose a point measurement technique for simultaneous gas temperature and velocity measurement based on thermographic phosphor particles dispersed in the fluid. The flow velocity is determined from the frequency of light scattered by BaMgAl10O17:Eu2+ phosphor particles traversing the fringes like in conventional laser Doppler velocimetry. Flow temperatures are derived using a two-color ratio method applied to the phosphorescence from the same particles. This combined diagnostic technique is demonstrated with a temperature precision of 4%–10% in a heated air jet during steady operation for flow temperatures up to 624 K. The technique provides correlated vector-scalar data at high spatial and temporal resolution.

Citation

Ojo, A. O., Fond, B., Van Wachem, B. G. M., Heyes, A. L., & Beyrau, F. (2015). Thermographic laser Doppler velocimetry. Optics letters, 40(20), 4759-4762. https://doi.org/10.1364/ol.40.004759

• Journal Article Type: Article
• Acceptance Date: Sep 15, 2015
• Online Publication Date: Oct 13, 2015
• Publication Date: Oct 15, 2015
• Deposit Date: Feb 8, 2021
• Publicly Available Date: Feb 8, 2021
• Journal: Optics Letters
• Print ISSN: 0146-9592
• Publisher: Optica
• Peer Reviewed: Peer Reviewed
• Volume: 40
• Issue: 20
• Pages: 4759-4762
• DOI: https://doi.org/10.1364/ol.40.004759
• Keywords: Combustion diagnostics; Remote sensing and sensors; Flow diagnostics; Laser Doppler velocimetry; Temperature; Fluorescent and luminescent materials
• Public URL: https://hull-repository.worktribe.com/output/3713554
• Publisher URL: https://www.osapublishing.org/ol/fulltext.cfm?uri=ol-40-20-4759&id=330601
• Related Public URLs: https://strathprints.strath.ac.uk/54715/