FLUID BODY FLOW VISUALIZATION DEVICE AND VISUALIZATION METHOD

摘要

When visualizing the flow of a fluid body which is an object to be measured, a first fluid body which is treated as a tracer is supplied from a nozzle opening within a flow field of a second fluid body. A laser beam comprising a wavelength which the first fluid body absorbs is projected such that the laser beam traverses within the flow field. The position of the projection of the laser beam at such time is controlled so as to scan within the flow field. Conversely, the laser beam that passes through the flow field is collected, and the position whereat the first fluid body intersects the laser beam is derived using the scan intensity signal of the collected laser beam, visualizing the flow of the second fluid body. The position whereat the first fluid body intersects the laser beam is derived on the basis of a position on the temporal axis whereat the value of the scan intensity signal falls below a set threshold. It is possible with said visualization to reliably visualize the flow field even of a high-speed fluid body.