The procedure developed involves measuring the unsteady propeller forces derived from operating in a circumferentially non-uniform inflow. This involves wake generation and survey, force measurement, and data analysis. The study was undertaken to expand the capability of the M.I.T. Variable Pressure Water tunnel to measure the six components (a force and moment in three dimensions) of unsteady propeller force. This is accomplished by foil and semiconductor strain gages applied to the stiff driveshaft on which the propeller is mounted. These signals are amplified, signal averaged, and computer analyzed for harmonic content. Strain gage waterproofing and electrical wiring problems encountered resulted in a limiting of the effective to partial dynamometer operation. This necessitated a more detailed description of the apparatus than usual, so that future experimenters may use component capability.

  • Corporate Authors:

    Massachusetts Institute of Technology

    Department of Ocean Engineering, 77 Massachusetts Avenue
    Cambridge, MA  United States  02139
  • Authors:
    • Pfister, W C
  • Publication Date: 1971-6

Subject/Index Terms

Filing Info

  • Accession Number: 00034671
  • Record Type: Publication
  • Source Agency: Massachusetts Institute of Technology
  • Files: TRIS
  • Created Date: Sep 29 1973 12:00AM