An experimental technique for the study of velocity profiles in a laminar jet using a pulsed nitrogen laser
Armstrong, David T.
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A nonintrusive technique for flow visualization of momentum jets has been investigated. A flow system containing a fluid photosensitive to ultraviolet radiation (a solution of mineral spirits and photochromic dye) has been constructed for generating a momentum jet in a test chamber. An ultraviolet beam (337.1 nm) from a pulsed nitrogen gas laser was fired through the test chamber producing opaque traces in the jet and ambient fluid. Movement of the fluid deformed these traces and produced a record of fluid flow. Velocity distributions have been obtained in laminar jets.