A CALCULATION METHOD OF UNSTEADY PROPELLER CAVITATION USING QUASI-STEADY CALCULATION RESULTS

This paper deals with a calculation method to obtain the shape of unsteady cavity sectional geometry on a propeller blade operating in a non-uniform wake field. The method makes use of calculated cavity geometry by a quasi-steady calculation. This method is based on the consideration about a non-uniform flow field around a propeller blade section operating in a non-uniform wake field. A calculation result based on this method shows the suppression of cavity length and volume in the cavity growing process, the phase delay of the maximum cavity volume and the acceleration of cavity collapse. This means that the hysteresis of the cavity length which was pointed out by Tulin (1980) could be expressed by this method. However, the decrease of the total cavity volume compared to the quasi-steady calculation result could not be clearly obtained. The detail geometry of cavity on the propeller blade does not coincide with the scale model experiment results precisely. Further improvement are required on these points.

• Supplemental Notes:
  • J Kansai Soc Naval Architects, n 224, Sept 1995, p 35 [7 p, 11 ref, 1 tab, 8 fig]
• Authors:
  • OKAMOTO, Y
• Publication Date: 1995

Language

• Japanese

Subject/Index Terms

• TRT Terms: Atmospheric pressure; Cavitation (Mechanics); Cavitation erosion; Propellers
• Old TRIS Terms: Pressure fluctuation
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00718723
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Mar 27 1996 12:00AM