PRACTICAL QUASI-CONTINUOUS METHOD TO ESTIMATE UNSTEADY CHARACTERISTICS OF PROPELLER

This paper presents a practical Quasi-Continuous Method (QCM) to estimate the unsteady characteristics of propeller in a wake based on the modified QCM proposed in a previous paper. Taking into consideration the effect of shed vortex system in addition to bound and trailing vortex system, the strength of bound vortex distribution is obtained and the unsteady thrust and torque of the propeller is calculated. For the pressure distribution on the propeller blade, the concept of unsteadily equivalent 2-D wing is introduced and then the pressure distribution is calculated using Moriya's method. The QCM method is applied to the Wagner problem and then to a conventional propeller and a highly-skewed propeller.

• Supplemental Notes:
  • Trans Soc Naval Arch West Japan, n 84, Aug 1992, p 23 [14 p, 8 ref, 17 fig]
• Authors:
  • Murakami, M
  • Kuroi, M
• Publication Date: 1992

Language

• Japanese

Subject/Index Terms

• TRT Terms: Numerical analysis; Propellers; Steady state; Vortices; Wakes
• Old TRIS Terms: Propeller efficiency; Unsteady state
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00706745
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM