TY - GEN
T1 - Time-series measurements of turbulent flow field using image processing system
AU - Kobayashi, K.
AU - Sakakibara, J.
AU - Hishida, K.
AU - Maeda, M.
PY - 1991/12/1
Y1 - 1991/12/1
N2 - A time series whole field velocity measurement was accomplished by the digital image processing. Laser light sheet illuminated the flow field synchronizing with CCD camera, and obtained images were recorded on the VTR with interval of 1/30 sec. Individual images were transferred from VTR under the control of personal computer with DSP (digital signal processor) to the image grabber, and the velocity vectors were evaluated using the cross-correlation technique. The time series analysis of the system showed good agreement with those of simultaneously applied LDV measurements. The present techniques applied to the thermally stratified shear flow in a horizontal pipe provided instantaneous and time series whole field velocities from 1400 planes (47 sec), and spatial eddy motions were revealed from the measurement which was unable to measure by point-measuring techniques.
AB - A time series whole field velocity measurement was accomplished by the digital image processing. Laser light sheet illuminated the flow field synchronizing with CCD camera, and obtained images were recorded on the VTR with interval of 1/30 sec. Individual images were transferred from VTR under the control of personal computer with DSP (digital signal processor) to the image grabber, and the velocity vectors were evaluated using the cross-correlation technique. The time series analysis of the system showed good agreement with those of simultaneously applied LDV measurements. The present techniques applied to the thermally stratified shear flow in a horizontal pipe provided instantaneous and time series whole field velocities from 1400 planes (47 sec), and spatial eddy motions were revealed from the measurement which was unable to measure by point-measuring techniques.
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M3 - Conference contribution
AN - SCOPUS:0026405607
SN - 0791808742
T3 - American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED
SP - 155
EP - 162
BT - Experimental and Numerical Flow Visualization
PB - Publ by ASME
T2 - Winter Annual Meeting of the American Society of Mechanical Engineers
Y2 - 1 December 1991 through 6 December 1991
ER -