Pulse-Burst Cross-Correlation Doppler Global Velocimetry
2020; American Institute of Aeronautics and Astronautics; Volume: 58; Issue: 6 Linguagem: Inglês
10.2514/1.j059172
ISSN1533-385X
AutoresTimothy W. Fahringer, Ross A. Burns, Paul M. Danehy, Philippe M. Bardet, Josef Felver,
Tópico(s)Heat Transfer Mechanisms
ResumoAn image-based flow velocimetry technique coupling pulse-burst laser technology and the cross-correlation Doppler global velocimetry (CC-DGV) technique is presented as a faster variant of the CC-DGV method. By scanning the laser frequency during the burst, the total scan time per velocity measurement can be reduced from 2–4 minutes (Cadel and Lowe, Optics and Lasers in Engineering, Vol. 71, Aug. 2015, pp. 51–61) to 10 ms, which is a speed increase of times. A demonstration of the technique has been performed in a turbulent jet, where the accuracy and precision of the technique was determined to be 5 and , respectively, when compared with particle image velocimetry.
Referência(s)