Accession Number : AD0695066

Title :   AEOLIAN TONES ASSOCIATED WITH RESONANT VIBRATION.

Descriptive Note : Technical rept.,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE ACOUSTICS AND VIBRATION LAB

Personal Author(s) : Leehey,Patrick ; Hanson,Carl E.

Report Date : JUN 1969

Pagination or Media Count : 51

Abstract : Measurements of oscillating lift coefficient, spanwise correlation length, Strouhal number, and radiated sound intensity were made on the same cylinder under the same test conditions over a Reynolds number range of 4000 to 6450. These measurements verified that the Curle theory of dipole radiation as expressed by Phillips for the Aeolian tone holds for a cylinder resonantly excited by a periodic wake in air. For small amplitude vibration, the increase of oscillating lift coefficient with Reynolds number accounts for the increase of sound intensity. (Author)

Descriptors :   (*CYLINDRICAL BODIES, *VIBRATION), (*SOUND, AERODYNAMIC CHARACTERISTICS), VORTICES, RESONANT FREQUENCY, THEORY, OSCILLATION, LIFT, REYNOLDS NUMBER, INTENSITY

Subject Categories : Aerodynamics
      Acoustics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE