CAVITATION AND PRESSURE FLUCTUATIONS ON MODELS AND FULL-SCALE AND THEIR INTERPRETATION

To investigate the scale effect of model propeller testing, three model propeller testing, three model propellers <1:18.67, 1:28, 1:35> of the containership Sydney Express were tested in the cavitation tunnels at HSVA. The development of cavitation phenomena was observed photographically and measurements were made of pressure fluctuations on plates suspended in the wake field at a distance of 0.3D from the propeller. The results are compared with full-scale measurements made by laser light scattering. In addition, tests were carried out with a model of the skewed propeller HSVA No. 2047 fitted to the ro-ro ship Lillooet, and the results compared with full-scale measurements. The investigations show the influence of cavitation nuclei on propeller-excited pressure fluctuations. This effect is entirely dependent on the speed of the propeller. Another major problem investigated in the course of this work was "tunnel effect". The study has demonstrated the possibility of improving the reliab- ility of cavitation tests by using screens to simulate the actual wake field. The cavitation extensions observed in all three tunnels are in good agreement with those observed aboard the Sydney Express.

• Supplemental Notes:
  • Jahrbuch der Schiffbautechnischen Gesellschaft, 76 <1982>, p.451 (20 pp., 24 ref., 2 tab.)
• Authors:
  • Weitendorf, E A
  • Friesch, J
  • Chao, K Y
• Publication Date: 1982

Language

• German

Subject/Index Terms

• Old TRIS Terms: Lillooet; Sydney express
• Subject Areas: Marine Transportation;

Filing Info

• Accession Number: 00685776
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM