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Leading-Edge Flutter of Supercavitating Hydrofoils

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Title Leading-Edge Flutter of Supercavitating Hydrofoils
 
Creator Brennen, C.
Oey, K. T.
Babcock, C. D.
 
Subject Caltech Library Services
 
Description This paper presents the results of experiments and analysis of the phenomenon of leading-edge flutter which has been observed to occur for supercavitating hydrofoils. The experiments confirmed the existence of such a single-degree-of-freedom flutter involving chordwise bending and indicated that for long, natural (or vapor-filled) cavities the reduced flutter speed, [formula], was in the range 0.15 to 0.23. Secondary effects observed were the variation with the angle of attack (a minimum flutter speed occurred at 10 deg) and with foil mass ratio. Shorter cavities typically yielded lower flutter speeds due to a complex interaction between the bubble collapse process occurring in the cavity closure region and the unsteady hydrodynamic load on the foil. Finally, a relatively simple theoretical analysis for supercavitating hydrofoils with elastic axes aft of midchord is presented. This linear analysis yields reduced flutter velocities somewhat lower than those observed.
 
Date 1980-09
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://authors.library.caltech.edu/61/1/BRE040.pdf
Brennen, C. and Oey, K. T. and Babcock, C. D. (1980) Leading-Edge Flutter of Supercavitating Hydrofoils. Journal of Ship Research, 24 (3). pp. 135-146. ISSN 0022-4502. http://resolver.caltech.edu/CaltechAUTHORS:BREjsr80 <http://resolver.caltech.edu/CaltechAUTHORS:BREjsr80>
 
Relation http://resolver.caltech.edu/CaltechAUTHORS:BREjsr80
http://authors.library.caltech.edu/61/