AEOLIAN TONES ASSOCIATED WITH RESONANT VIBRATION.

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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

Author(s):
Leehey, Patrick ; Hanson, Carl E.
Author Organization(s):
MASSACHUSETTS INST OF TECH CAMBRIDGE ACOUSTICS AND VIBRATION LAB
Descriptive Note:
Technical rept.,
Pagination:
0051

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
A/V-76234-4
Contract/Grant Number(s):
Nonr-3963(26)
Project Number(s):
NR-264-027
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*CYLINDRICAL BODIES, *VIBRATION), (*SOUND, AERODYNAMIC CHARACTERISTICS), VORTICES, RESONANT FREQUENCY, THEORY, OSCILLATION, LIFT, REYNOLDS NUMBER, INTENSITY
Field(s)/Group(s):
Aerodynamics, Acoustics, Fluid Mechanics
Keyword(s):
*AEOLIAN TONES, VORTEX SHEDDING
Report Date:
1969 Jun 01