Pulse-Burst Cross-Correlation Doppler Global Velocimetry

被引：2

作者：

Fahringer, Jr Timothy W. ^{[1
]}

Burns, Ross A. ^{[1
]}

Danehy, Paul M. ^{[2
]}

Bardet, Philippe M. ^{[3
]}

Felver, Josef ^{[4
]}

机构：

[1] NASA, Langley Res Ctr, Natl Inst Aerosp, Hampton, VA 23681 USA

[2] NASA, Langley Res Ctr, Adv Measurement & Data Syst Branch, MS 493, Hampton, VA 23681 USA

[3] George Washington Univ, Mech & Aerosp Engn, 800 22nd St NW SEH 3580, Washington, DC 20052 USA

[4] Spectral Energies LLC, Dayton, OH 45430 USA

来源：

AIAA JOURNAL | 2020年 / 58卷 / 06期

关键词：

MODE LASER;

D O I：

10.2514/1.J059172

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

An 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 >1000 times. A demonstration of the technique has been performed in a 50 ms(-1) turbulent jet, where the accuracy and precision of the technique was determined to be 5 and 3 ms(-1), respectively, when compared with particle image velocimetry.

引用

页码：2364 / 2369

页数：6

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