Journal article
A Transverse Oscillation Approach for Estimation of Three-Dimensional Velocity Vectors, Part II: Experimental Validation
The 3-D transverse oscillation method is investigated by estimating 3-D velocities in an experimental flowrigsystem. Measurements of the synthesized transverse oscillatingfields are presented as well. The method employs a 2-D transducer; decouples the velocity estimation; and estimates the axial, transverse, and elevation velocity components simultaneously.
Data are acquired using a research ultrasound scanner. The velocity measurements are conducted with steady flow in sixteen different directions. For a specific flow direction with [α,β]= [45,15]°, the mean estimated velocity vector at the center of the vessel is (vx,vy,vz) = (33.8,34.5,15.2) ± (4.6,5.0,0.6)cm/s where the expected velocity is (34.2,34.2,13.0)cm/s.
The velocity magnitude is 50.6 ± 5.2cm/s with a bias of 0.7cm/s.The flow angles α and β are estimated as 45.6 ± 4.9° and 17.6± 1.0°. Subsequently, the precision and accuracy are calculated over the entire velocity profiles. On average for all direction,the relative mean bias of the velocity magnitude is −0.08%.
For α and β, the mean bias is −0.2° and −1.5°. The relative standard deviations of the velocity magnitude ranges from 8 to 16%. For the flow angles, the ranges of the mean angular deviations are 5° to 16° and 0.7° and 8°.
Language: | English |
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Publisher: | IEEE |
Year: | 2014 |
Pages: | 1608-1618 |
ISSN: | 15258955 and 08853010 |
Types: | Journal article |
DOI: | 10.1109/TUFFc.2013.006238 |
ORCIDs: | Stuart, Matthias Bo , Tomov, Borislav Gueorguiev and Jensen, Jørgen Arendt |
2D transducer 3D transverse oscillation method Estimation Oscillators Standards Transducers Ultrasonic variables measurement Vectors Velocity measurement angular deviation axial velocity components elevation velocity components experimental flow-rig system flow angles flow direction steady flow three-dimensional velocity vector estimation transverse oscillating fields transverse velocity components ultrasonic transducers ultrasonic velocity measurement ultrasound scanner velocity magnitude velocity measurements