Abstract
An LDA probe with optimized measuring volume was obtained based on repeated adjustments of a preconfigured LDA system with a calibrated spinning disc. A retriggerable pulse-width-and-time-delay module was used to trigger and freeze favorable Doppler bursts. After a repeated beam-steering procedure and a fringe-pattern analysis, we found that the variation of fringe spacing throughout the measuring volume was reduced from 3% to 0.28%, such that the adjusted probe gave more accurate measurements. To verify this applicability in velocity calibration, the fringe spacing of the adjusted LDA measuring volume was treated as a velocity coefficient, and its mean and measurement uncertainty was experimentally estimated. Analysis shows that the expanded uncertainty of the coefficient was 0.10% at the 95% level of confidence for both the components of the LDA. The results demonstrated that the adjusted LDA system was qualified to perform accurate flow measurement.
| Original language | English |
|---|---|
| Pages (from-to) | 291-304 |
| Number of pages | 14 |
| Journal | Optics and Lasers in Engineering |
| Volume | 38 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2002 Nov 1 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Mechanical Engineering
- Electrical and Electronic Engineering
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Adjustment and evaluation of an LDA probe for accurate flow measurement. / Yang, Cheng Tsair; Wu, Meng Chai; Chuang, Han-Sheng.
In: Optics and Lasers in Engineering, Vol. 38, No. 5, 01.11.2002, p. 291-304.Research output: Contribution to journal › Article
TY - JOUR
T1 - Adjustment and evaluation of an LDA probe for accurate flow measurement
AU - Yang, Cheng Tsair
AU - Wu, Meng Chai
AU - Chuang, Han-Sheng
PY - 2002/11/1
Y1 - 2002/11/1
N2 - An LDA probe with optimized measuring volume was obtained based on repeated adjustments of a preconfigured LDA system with a calibrated spinning disc. A retriggerable pulse-width-and-time-delay module was used to trigger and freeze favorable Doppler bursts. After a repeated beam-steering procedure and a fringe-pattern analysis, we found that the variation of fringe spacing throughout the measuring volume was reduced from 3% to 0.28%, such that the adjusted probe gave more accurate measurements. To verify this applicability in velocity calibration, the fringe spacing of the adjusted LDA measuring volume was treated as a velocity coefficient, and its mean and measurement uncertainty was experimentally estimated. Analysis shows that the expanded uncertainty of the coefficient was 0.10% at the 95% level of confidence for both the components of the LDA. The results demonstrated that the adjusted LDA system was qualified to perform accurate flow measurement.
AB - An LDA probe with optimized measuring volume was obtained based on repeated adjustments of a preconfigured LDA system with a calibrated spinning disc. A retriggerable pulse-width-and-time-delay module was used to trigger and freeze favorable Doppler bursts. After a repeated beam-steering procedure and a fringe-pattern analysis, we found that the variation of fringe spacing throughout the measuring volume was reduced from 3% to 0.28%, such that the adjusted probe gave more accurate measurements. To verify this applicability in velocity calibration, the fringe spacing of the adjusted LDA measuring volume was treated as a velocity coefficient, and its mean and measurement uncertainty was experimentally estimated. Analysis shows that the expanded uncertainty of the coefficient was 0.10% at the 95% level of confidence for both the components of the LDA. The results demonstrated that the adjusted LDA system was qualified to perform accurate flow measurement.
UR - http://www.scopus.com/inward/record.url?scp=0036833068&partnerID=8YFLogxK
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U2 - 10.1016/S0143-8166(01)00152-X
DO - 10.1016/S0143-8166(01)00152-X
M3 - Article
AN - SCOPUS:0036833068
VL - 38
SP - 291
EP - 304
JO - Optics and Lasers in Engineering
JF - Optics and Lasers in Engineering
SN - 0143-8166
IS - 5
ER -