High Frequency Flow Noise
Final rept. 7 Feb 1973-6 Feb 1974
TEXAS UNIV AT AUSTIN APPLIED RESEARCH LABS
Pagination or Media Count:
A high frequency flow noise study was conducted at the Applied Research Laboratories ARL, The University of Texas at Austin. The facility for measurement of flow noise is described. Data are presented for two frequencies, 100 kHz and 200 Khz, and for three soundhead array designs, a planar array, a cylindrical array, and a liquid lens. Data from acoustical measurements show 1 the effects of the speed of the soundhead through the water, 2 the effects of array location within a planar hydrophone housing, 3 the effects of streamlining soundheads, and 4 the effects of streamlining surface piercing struts. The liquid lens hydrophone configuration proved most noise resistant. Recommendations are made for reduction of flow noise by means of soundhead design. Parameters for future flow noise experiments are presented.
- Acoustic Detection and Detectors
- Fluid Mechanics