Visualization and Velocity Measurement of Flow through Impeller of a Multi Blade Fan by Using PIV Technique

Visualization and velocity measurement of flow through impeller of a multi blade fan have been carried out with PIV technique. Tracer particle image was taken by a still camera. Test section was illuminated by dual laser beam sweep method. The obtained double exposured photograph was low density particle image. It was analyzed by auto-correlation method with personal computer. Reconstructed vector diagram shows a good agreement with that obtained by a particle tracking method.