Accession Number : AD0717730

Title :   Spinning Modes in Ducted Submersible Vehicle Propellers,

Corporate Author : MASSACHUSETTS UNIV AMHERST SCHOOL OF ENGINEERING

Personal Author(s) : Russell,G. A.

Report Date : NOV 1970

Pagination or Media Count : 23

Abstract : The spinning mode theory, first developed in the study of jet engine compressor pure tone noise, is applied to the ducted marine propeller. Because of the lower number of blades and lower rotational speeds, the interaction noise generated in the marine situation can give rise to non-decaying spinning modes. A graphical procedure for predicting these non-decaying modes is developed and discussed. (Author)

Descriptors :   (*PROPELLERS(MARINE), *PROPELLER NOISE), (*UNDERWATER VEHICLES, PROPELLERS(MARINE)), SHROUDED PROPELLERS, ROTATION, MATHEMATICAL ANALYSIS

Subject Categories : Marine Engineering
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE