Time-series measurements of turbulent flow field using image processing system

K. Kobayashi, J. Sakakibara, K. Hishida, M. Maeda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationExperimental and Numerical Flow Visualization
PublisherPubl by ASME
Pages155-162
Number of pages8
ISBN (Print)0791808742
Publication statusPublished - 1991 Dec 1
EventWinter Annual Meeting of the American Society of Mechanical Engineers - Atlanta, GA, USA
Duration: 1991 Dec 11991 Dec 6

Publication series

NameAmerican Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED
Volume128

Other

OtherWinter Annual Meeting of the American Society of Mechanical Engineers
CityAtlanta, GA, USA
Period91/12/191/12/6

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Kobayashi, K., Sakakibara, J., Hishida, K., & Maeda, M. (1991). Time-series measurements of turbulent flow field using image processing system. In Experimental and Numerical Flow Visualization (pp. 155-162). (American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED; Vol. 128). Publ by ASME.