LINEAR DESIGN OF SUPERCAVITATING CASCADE SECTIONS

A method for designing two-dimensional supercavitating cascade sections is developed. Linear superposition is utilized to produce a foil section that has a low drag-to-lift ratio and yet has a reasonably thick cavity. Foils of three elementary pressure distributions are analyzed separately; i.e., a low drag-pressure distribution, a concentrated leading-edge pressure, and a flat plate with angle of attack. The double spiral vortex model is taken for the cavity termination. The pressure distributions are superposed to give the desired lift and cavity thickness for any specified cavity length and cascade geometry. The cavity drag, the cavitation number, and the foil-cavity shape are the main output of the computer program. Cascade parameters are shown to strongly influence the previouly mentioned quantities as well as the leading-edge shape.

• Corporate Authors:

  Naval Ship Research and Development Center

  Ship Performance Department
  Bethesda, MD  United States  20034
• Authors:
  • Yim, B
  • Higgins, L
• Publication Date: 1974-3

Media Info

• Features: References;
• Pagination: 40 p.

Subject/Index Terms

• TRT Terms: Cavitation (Mechanics); Cavitation erosion; Propellers; Supercavitating hydrofoils
• Old TRIS Terms: Cavity dynamics
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00057037
• Record Type: Publication
• Source Agency: Naval Ship Research and Development Center
• Report/Paper Numbers: #4239
• Files: TRIS
• Created Date: Jul 31 1974 12:00AM