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Experiments on Struts Piercing the Water Surface

Perry, Byrne (1954) Experiments on Struts Piercing the Water Surface. California Institute of Technology , Pasadena, CA. (Unpublished)

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Water tunnel measurements were made on rectangular bar and circular cylinder struts piercing the free water surface. These were run at several depths and velocities in order to measure drag forces and to investigate the mechanism by which air often ventilates down behind such struts. It was found that the ventilation mechanism depends on viscous wake phenomena in a manner similar to ventilation behind fully-submerged bodies. Moreover, in fully-ventilated flow the forces are well predicted by application of two-dimensional cavity theory. A hysteresis effect on ventilation and forces was observed and found to be caused by surface tension. This last may explain some discrepancies between the present drag data and that previously taken on circular cylinders in a towing tank.

Item Type:Report or Paper (Technical Report)
Additional Information:Department of the Navy Naval Ordnance Test Station Contract N123s-91875 Task Order No. 5. Report No. E-55.1.
Group:Hydrodynamics Laboratory
Funding AgencyGrant Number
Naval Ordnance Test StationN123s-91875
Record Number:CaltechAUTHORS:20150526-135328932
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:57821
Deposited On:27 May 2015 19:01
Last Modified:03 Oct 2019 08:29

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