MEASUREMENT OF SPEED IN DIRECTION PERPENDICULAR TO FLOW SECTIONAL PLANE

摘要

PURPOSE:To realize a three-dimensional analysis by measurement of fluctuation of concentrations of an infrared-heated plane by intensity of heat-radiating energy and of that of a visual plane by intensity of scattered light. CONSTITUTION:A slit heat ray 5H is irradiated in a pulse state to a flow field of gaseous colloid located in a model chamber 1 and colloid grains are heated instantaneously existing in a plane flow of any section. Then, photographic record of an infrared-heated flow field is taken with an infrared TV-camera 20H and displayed on a monitoring TV 21H and a light intensity of this heat image is converted to an electrical signal for detection by a photosensor set 22H on a Braun-tube and when this is removed of an image scanning signal through a filter 23, then a fluctuation of concentration on a certain point of infrared-heated plane and flow field can be measured. Then, from the flow field visualized by slit light 5V irradiated parallel to the heat ray, scattered lights proportional to the concentration can be obtained and by processing fluctuation of brightnesses of an image on the monitoring TV 21V by the same process as the heat image, a three-dimensional fluctuation of concentrations can be measured from both infrared-heated plane and visualized plane.