HYDRODYNAMIC DRAG OF THREE-DIMENSIONAL BODIES BY MEANS OF A LASER DOPPLER WAKE SURVEY

An investigation of the application of Laser Doppler Anemometry to the determination of hydrodynamic drag by means of a wake survey is described. The experimental study, which was limited to viscous drag, is discussed. The particular objects studied were a MIT Series of yacht keels, with the without turbulence stimulation, at varying angles of attack, and varying Reynolds number. A discussion is given of the theory relating to the calculation of drag from a wake velocity survey. A series of guidelines are given for the use of the Laser Doppler Anemometer System for future studied in the MIT Water Tunnel facility. Graphs and tabulated results of the calculated drag coefficients versus Reynolds number are given, along with a commentary on the particular results.

• Corporate Authors:

  Massachusetts Institute of Technology

  Department of Ocean Engineering, 77 Massachusetts Avenue
  Cambridge, MA  United States  02139
• Authors:
  • Knobel, J R
• Publication Date: 1978-2

Subject/Index Terms

• TRT Terms: Anemometers; Drag; Hydrodynamics; Lasers; Measurement; Reynolds number; Test facilities; Wakes
• Old TRIS Terms: Drag measurement; Laser anemometers; Wake surveys; Water tunnel testing
• Subject Areas: Design; Hydraulics and Hydrology; Marine Transportation;

Filing Info

• Accession Number: 00173916
• Record Type: Publication
• Source Agency: Massachusetts Institute of Technology
• Report/Paper Numbers: MS Thesis
• Files: TRIS
• Created Date: May 3 1978 12:00AM