Pressure Signatures of a Cylindrical Body Moving in Aqueous Solutions of Poly(Ethylene Oxide).
Abstract
A whirling arm apparatus was successfully developed and tested for investigating the pressure signatures of submerged bodies of length less than one foot. The pressure signature of a cylindrical body, nine inches long and one inch in diameter, moving at constant velocities of 1.57, 1.84, and 2.36 m/s in aqueous solutions of poly(ethylene oxide) WSR-301 at concentrations of 0, 50, 100, and 200 wppm was investigated under laminar flow conditions; Reynolds numbers, based on length, were in the range from 360,000 to 540,000. A regular laminar flow pattern was investigated utilizing the body with a hemispherical bow and tapered stern, and a laminar flow pattern with forced fluid separation followed by reattachment was investigated by utilizing a squared-off bow and a tapered stern. A barium titanite crystal hydrophone was used as the sensor. No apparent difference in the pressure signature was found which could be attributed to the addition of the polymer into solution. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1970
- Accession Number
- AD0717584
Entities
People
- Ray Cowden Witter
Organizations
- Naval Postgraduate School