レーザ干渉法による流体の観測

概要

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Synopsis　The flow patterns of water flow passing through the cylindrical plastic tubes were studied by means of the interferometeric method. The measurements were performed simultaneously by photographic- and electronic detection using the He-Ne laser beam with a wave length of 6328 Å as an optical sorce. The favorable experimental conditions were discussed from experimental results obtained.　It is unavoidable to expend the time three long hours in order to establish a steady state by the flow system, moreover the residual fringe shifts were yet retained as much as 1/30-1/60 fringes per minute for following 2-3 hours. Disturbed flows, caused by pouring water into the flow tube, were reached to transient state within about 10 minutes. The distortion of flow tube, elongation of tube or bending of the window glasses, would reasonably occur although hybraulic pressure inside of tube not so differ from atmospheric pressure.　The experimental results suggest that the observations of fringes by dint of the simultaneous detections, photographic and electronic, give the quantative analyses of the local changes of flow.
山形大学の論文
1972-01-20