ANALYSIS OF WAKE SURVEY AND BOUNDARY LAYER MEASUREMENTS FOR THE R/V ATHENA REPRESENTED BY MODEL 5366 IN THE ANECHOIC WIND TUNNEL
This report presents results of wake survey and boundary layer profile measurements for a model representing a twin-screw displacement ship. These measurements were obtained in a wind tunnel using hot wire anemometers. Wake surveys were conducted in the propeller disk and ahead of the propeller plane with and without the propeller operating. Circumferential distributions of the longitudinal, tangential, and radial velocity components at four radial locations and a harmonic analysis of each component are included. The boundary layer profile measurements were obtained at three longitudinal locations in the area of the shafting and struts. A comparison of full-scale, model-scale towing tank, and wind tunnel measurements is presented. Model-scale boundary layer velocity profiles ahead and astern of the propeller plane were smaller than the full-scale profiles. The model wake surveys ahead of the propeller plane showed no significant differences with and without the propeller operating. The data from the wind tunnel wake survey in the propeller plane agreed better with the full-scale data than the towing tank data.
David Taylor Naval Ship R&D CenterShip Performance Department
Bethesda, MD USA 20084
- Hurwitz, R B
- Jenkins, D S
- Publication Date: 1980-7
- Pagination: 95 p.
- TRT Terms: Boundary layer flow; Propulsion; Prototype tests; Tanks (Containers); Towing devices; Velocity; Wakes; Wind tunnels
- Old TRIS Terms: Towing tanks; Twin screws; Velocity analysis; Wake surveys
- Subject Areas: Design; Marine Transportation;
- Accession Number: 00325853
- Record Type: Publication
- Report/Paper Numbers: DTNSRDC/SPD-0833-02 Final Rpt.
- Files: TRIS
- Created Date: Mar 12 1981 12:00AM