FIELD: physics.
SUBSTANCE: invention is intended for determination of velocity in mix of gaseous and liquid components, mostly steam flowing in steam pipeline of small diametre and mixed with liquid phase in the form of water drops of different size. In process of measurement two collimated light beams spaced in direction of flow at previously specified distance are sent via polyphase liquid medium by means of pipe transparent sections from illuminating device (light diode, junction laser). Scattered, deflected and weakened light is detected with the help of two photo detectors connected to two collimated beams for creation of two signals. Cross-relation function is calculated between two signals to determine time delay between signals; and average velocity of polyphase liquid medium is calculated as ratio of previously determined distance to time delay. In version of realisation pair of flat light beams are sent through liquid medium.
EFFECT: increased accuracy of measurement of average and local velocity of steam medium, possibility to define steam quality.
19 cl, 19 dwg
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