Rudder Force and Moment Measurements on a 1/4-Scale SES 100 Rudder

Abstract

Force and moment measurements were obtained in the NSRDC 36-in. variable-pressure water tunnel on a high-speed rudder with a geometric aspect ratio of 1.47. Data presented adhere to Froude scaling with an attempt to scale appropriate cavitation number. The cavitation index was varied from 3.4 to 0.16 for angles of attack of 0 to 29 deg. Lift, drag, and rudder stock torque were all significantly affected by variations in the cavitation number. Additional data are presented for Froude scaling only without considering the effect of cavitation number. The report also indicates a decrease in forces and moments with ventilation of the rudder at the trailing edge versus no ventilation.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1973
Accession Number
AD0772520

Entities

People

  • David W Taylor
  • Douglas E. Layne

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Acquisition
  • Aspect Ratio
  • Bending Moments
  • Coordinate Systems
  • Data Acquisition
  • Flow
  • Froude Number
  • Marine Engineering
  • Measurement
  • Models
  • Reynolds Number
  • Ships
  • Surface Effect Ships
  • Test And Evaluation
  • Trailing Edges
  • Variable Pressure
  • Ventilation

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Marine Hydrodynamics