CAVITATION SUPPRESSION AND STRESS EFFECTS IN HIGH-SPEED FLOWS OF WATER WITH DILUTE MACROMOLECULE ADDITIVES

Experiments were carried out to study the effect of dilute aqueous polymer solutions on flow-generated cavitation inception. The cavitation inception on 1/4 and 1/2-in.-dia. models with a hemispherical nose in a blowdown water tunnel was inhibited at an observed range of Reynolds numbers. Reduction of the incipient cavitation number to 30 percent of its value for tap water was observed, depending on the kind of polymer used, its concentration, and the Reynolds number. Flow velocity field visualization was achieved by optical techniques, which measured the flow velocities and was used to correct values computed from venturi pressure drop. (Author)

• Supplemental Notes:
  • Presented at the Winter Annual Meeting of the American Society of Mechanical Engineers held in Los Angeles, Calif. on 16-20 Nov. 69, Paper No. 69-WA/FE-32. Also available from Journal of Basic Engineering, Sep 70, pp459-466.
• Corporate Authors:

  University of California, La Jolla

  La Jolla, CA  United States  92037
• Authors:
  • Ellis, A T
  • Waugh, J G
  • Ting, R Y
• Publication Date: 1969-8-11

Media Info

• Pagination: 9 p.

Subject/Index Terms

• TRT Terms: Additives; Cavitation (Mechanics); Nonnewtonian flow; Polymers
• Old TRIS Terms: Model testing; Polymer additives
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00024845
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: Res Rpt
• Contract Numbers: N00014-67-A-01090007, N60530-12164, N60530-69-C-0030
• Files: TRIS
• Created Date: Feb 4 1972 12:00AM