Abstract
The channels of the fluid machinery and plants have rather simple contours of the cross and longitudinal sections such as quadratic surfaces or tori. Murai and et al's method for the use of a non-metric camera and Okamoto et al's method for multi-layer analytical photogrammetry with a little modification were applied to photogrammetry through the surfaces of the channels. The results of experimental investigations on the plane and the cylindrical surface with a circular cross-section as the refraction planes revealed that the methods have sufficient accuracy for the flow measurements by the CCD-camera and image-proccesor system.
