SOME CHARACTERISTICS OF A PARTIALLY CAVITATING HYDROFOIL

Cavitation is one of the most important in the field of ship hydrodynamics. It is almost unavoidable phenomena for heavily loaded screw propellers. In spite of many investigations that have been carried out for a long time, there are many problems left to be pursued. Especially quantitative explanations of cavitation are lacking or left vague. An experimental research on the steady state cavitation on a two-dimensional hydrofoil was undertaken at the cavitation tunnel of Tokyo University. The authors have added some experimental data, emphasizing the importance of pressure distribution itself rather than the total force or moment acting on a hydrofoil. To this end local pressures at four points on the suction side of the profile were measured and compared with calculations. Conclusions obtained are as follows: 1. A complicated type of cavitation named "activated sheet cavitation" occurs and plays a significant part as far as a two-dimensional hydrofoil at high angle of attack is concerned. 2. Pressure distribution in the wetted area are scarely affected by the presence of partial cavitation that covers the fore surface of a hydrofoil. 3. The pressure at the rear end of the cavity does not reach the stagnation pressure, and the reduction of C sub p is less than 20 percent of the non-cavitating C sub p. 4. Mathematical model of cavity, where the rear of cavity is represented by a distribution of weak sinks, shows fairly good agreement with experiment.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/05148499
• Corporate Authors:

  Society of Naval Architects of Japan

  23 Shiba-kotohiracho, Minato-ku
  Tokyo 135,   Japan 

  Society of Naval Architects of Japan

  15-16, Toranomon, 1-chome, Minato-ku
  Tokyo,   Japan 
• Authors:
  • Miyata, H
  • Tamiya, S
  • KATO, H
• Publication Date: 1972-12

Language

• Japanese

Media Info

• Pagination: p. 99-105
• Serial:
  • Journal of the Society of Naval Architects of Japan
  • Volume: 132
  • ISSN: 0514-8499

Subject/Index Terms

• TRT Terms: Cavitation (Mechanics); Cavitation erosion; Hydrofoils; Pressure; Propellers
• Uncontrolled Terms: Pressure distribution
• Old TRIS Terms: Cavitating hydrofoils
• Subject Areas: Design; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00051512
• Record Type: Publication
• Source Agency: Society of Naval Architects of Japan
• Files: TRIS
• Created Date: Mar 18 1974 12:00AM