Accession Number : AD0785872

Title :   A Buoyancy-Propelled-Test-Body Laboratory Facility.

Descriptive Note : Final rept. May 66-Feb 74,

Corporate Author : MINNESOTA UNIV MINNEAPOLIS ST ANTHONY FALLS HYDRAULIC LAB

Personal Author(s) : Killen,John M.

Report Date : JUN 1974

Pagination or Media Count : 35

Abstract : The physical form of a buoyancy-propelled-test-body facility and some preliminary test results are described. The facility is a 26-meter-high, 1.067-meter-diameter standpipe which can be filled with water or other liquid. An axisymmetric body rises by buoyancy and is guided up the center on a taut restraining cable. Sensors for measurement of velocity and displacement are incorporated into the guide cable. The standpipe is also equipped to provide pull-down and release of the test body, initial acceleration, and stopping. The confined space of a standpipe within the laboratory permits controlled use of drag reducing polymer in the test liquid and nucleus removal to reduce cavitation. (Modified author abstract)

Descriptors :   *Acoustic measurement, *Underwater sound, *Drag reduction, *Test equipment, Test facilities, Buoyancy, Boundary layer, Surface properties, Pressure measurement, Periodic variations, Polymers, Vertical orientation

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE