Behavior of Air Bubbles in an Axial-Flow Pump Impeller

[+] Author and Article Information
M. Murakami

Department of Mechanical Engineering, Nagoya University, Nagoya, Japan

K. Minemura

College of General Education, Nagoya University, Nagoya, Japan

J. Fluids Eng 105(3), 277-283 (Sep 01, 1983) (7 pages) doi:10.1115/1.3240986 History: Received December 22, 1981; Online October 26, 2009


Motion of air bubbles in a high-specific-speed axial-flow pump impeller was analyzed on the basis of measured streak lines of air bubbles in the impeller. The results were compared with those obtained by a numerical solution of the bubble motion equations for three dimensional flow. Governing factors of the bubble motion are the drag force due to the surrounding water and the force due to the pressure gradient. Trajectories of the bubbles deviate somewhat from the streamlines of water, and the amount of the deviation is dependent on the bubble diameter and also on specific-speeds of the pumps and flow rate of water.

Copyright © 1983 by ASME
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