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RESEARCH PAPERS

Cavitation Testing of Propellers in a Free Surface Tunnel Utilizing Micro Air Bubble Control

[+] Author and Article Information
K. Albrecht, O. Bjorheden

KMW MARINE Lab., Kristinehamn, Sweden

J. Fluids Eng 97(4), 523-531 (Dec 01, 1975) (9 pages) doi:10.1115/1.3448102 History: Received February 05, 1975; Online October 12, 2010

Abstract

Cavitation testing in a free surface tunnel presents specific problems in terms of low content of undissolved micro air bubbles in the water owing to the high de-aerating capacity of the tunnel. Such air nuclei are necessary to provide realistic conditions for the inception and extension of cavitation, in particular bubble cavitation at intermediate propeller loading. This paper gives a brief discussion of the problem in relation to some test results obtained in the new free surface tunnel at the KMW Marine Laboratory. A special device built into the tunnel circuit to produce the necessary amount of micro bubbles and its effect on cavitation and propeller forces is described.

Copyright © 1975 by ASME
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