Springer Online Journal Archives 1860-2000
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Abstract Methods of inserting and photographing tracers in an air stream are described. Successive positions of micrometer-sized oil drops are determined in centimeter-sized fields of a low power microscope by triple flash illumination at known intervals of 10 to 500 microseconds. Tracer positions read from the picture are entered into a computer and velocities calculated throughout the field. Some examples of computer displays of velocity fields are presented.
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