A Theoretical Study on Air Bubble Motion in a Centrifugal Pump Impeller

[+] Author and Article Information
Kiyoshi Minemura

Department of General Education, Nagoya University, Nagoya, Japan

Mitsukiyo Murakami

Department of Mechanical Engineering, Nagoya University, Nagoya, Japan

J. Fluids Eng 102(4), 446-453 (Dec 01, 1980) (8 pages) doi:10.1115/1.3240721 History: Received September 18, 1979; Online October 26, 2009


Equations of motion for air bubbles in a centrifugal pump impeller were obtained and solved numerically for a flow in a radial-flow-type impeller, and the results were compared with experiments. Governing factors for the bubble motion are the force due to the pressure gradient, the drag force due to the flow resistance of the surrounding liquid, and the inertia force due to virtual mass of the liquid. If the bubble diameter is reduced continuously, the effect of the inertia force is also reduced and trajectories of the air bubbles approach more and more to the path of the flowing water.

Copyright © 1980 by ASME
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