EXPERIMENTS WITH VORTEX GENERATORS TO IMPROVE THE FLOW OVER A SHIP'S STERN IN ORDER TO REDUCE OPERATIONAL NOISE AND VIBRATION

During trials of a 31,000 t (30,000 ton) tanker, unacceptable noise levels were measured in cabins near the stern and local structural vibration occurred in some adjacent areas especially at shallow draught. Both the noise and vibration were attributed to the operation of the propeller in a non-uniform velocity field. Wind tunnel experiments using a reflex model of the ship showed that vortex generators could make a marked improvement in the velocity distribution of the wake. Based on these tests a vortex generator configuration was developed and fitted to the ship. However, although there was a significant reduction in vibration, there was no corresponding reduction in the noise levels in the cabins.

  • Corporate Authors:

    Aeronautical Research Laboratories

    P.O. Box 4331, GPO, Dept of Defense
    Melbourne, Victoria 3001,   Australia 
  • Authors:
    • Matheson, N
  • Publication Date: 1975-9

Media Info

  • Pagination: 85 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00181024
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: ARL/AERO NOTE-358
  • Files: TRIS
  • Created Date: Sep 14 1978 12:00AM