FLOW NOISE OF STREAMLINED BODIES FALLING FREELY IN WATER

FLOW NOISE OF STREAMLINED BODIES FALLING FREELY IN WATER

Sound pressure fluctuations were measured by single hydrophones imbedded in streamlined, plastic, laminar flow bodies about 10 inches long and with trailing cables while the bodies dropped through water at Lake Pend Oreille, Idaho. The pressure levels approximated those of the ambient noise measured...

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Bibliographische Detailangaben
1. Verfasser: Laitinen,P O
Format: Report
Sprache:eng
Schlagworte:
BOUNDARY LAYER
CONICAL BODIES
FLUID FLOW
FLUID MECHANICS
FREE FALL MODELS
HYDRODYNAMIC CONFIGURATIONS
HYDROPHONES
INSTRUMENTATION
MODEL TESTS
Most Project-2
NOISE
NOISE ANALYZERS
PRESSURE
TURBULENCE
TURBULENT BOUNDARY LAYER
UNDERWATER
UNDERWATER SOUND
VELOCITY
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Beschreibung
Zusammenfassung:Sound pressure fluctuations were measured by single hydrophones imbedded in streamlined, plastic, laminar flow bodies about 10 inches long and with trailing cables while the bodies dropped through water at Lake Pend Oreille, Idaho. The pressure levels approximated those of the ambient noise measured with the bodies submerged at rest, unless the body boundary layers were intentionally tripped into turbulence by tripping wires. Relative broadband pressure values and relative pressure spectra were derived and are explained along with applicable flow noise theory. (Author)