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Spectral and correlation characteristics of the turbulent boundary layer on an extended flexible cylinder

Spectral and correlation characteristics of the turbulent boundary layer on an extended flexible... In marine geophysical seismological prospecting extensive use is made of towed receiving systems consisting of extended flexible cylinders containing acoustic sensors over which the water flows in the longitudinal direction. The boundary layer pressure fluctuations on the cylinder surface are picked up by the sensors as hydrodynamic noise. This paper is concerned with the study of the energy and spacetime characteristics of the pressure fluctuations in the turbulent boundary layer on an extended flexible cylinder in a longitudinal flow. The pressure fluctuations on the cylinder surface have been investigated experimentally for ReX=(2–4)·107, a dimensionless diameter of the pressure fluctuation sensors d p + =dpu*/ν=500, where dp is the sensor diameter, u* the dynamic viscosity, andν the viscosity coefficient, and frequencies 0.023≤Ω≤11.259 (Ω=ωδ*/U∞). The spectral and correlation characteristics of the pressure fluctuations on the surface of the flexible cylinder are found to differ from the corresponding characteristics for a rigid cylinder [1–4]. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Fluid Dynamics Springer Journals

Spectral and correlation characteristics of the turbulent boundary layer on an extended flexible cylinder

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References (12)

Publisher
Springer Journals
Copyright
Copyright
Subject
Physics; Fluid- and Aerodynamics; Classical and Continuum Physics; Classical Mechanics; Engineering Fluid Dynamics
ISSN
0015-4628
eISSN
1573-8507
DOI
10.1007/BF01051721
Publisher site
See Article on Publisher Site

Abstract

In marine geophysical seismological prospecting extensive use is made of towed receiving systems consisting of extended flexible cylinders containing acoustic sensors over which the water flows in the longitudinal direction. The boundary layer pressure fluctuations on the cylinder surface are picked up by the sensors as hydrodynamic noise. This paper is concerned with the study of the energy and spacetime characteristics of the pressure fluctuations in the turbulent boundary layer on an extended flexible cylinder in a longitudinal flow. The pressure fluctuations on the cylinder surface have been investigated experimentally for ReX=(2–4)·107, a dimensionless diameter of the pressure fluctuation sensors d p + =dpu*/ν=500, where dp is the sensor diameter, u* the dynamic viscosity, andν the viscosity coefficient, and frequencies 0.023≤Ω≤11.259 (Ω=ωδ*/U∞). The spectral and correlation characteristics of the pressure fluctuations on the surface of the flexible cylinder are found to differ from the corresponding characteristics for a rigid cylinder [1–4].

Journal

Fluid Dynamics – Springer Journals

Published: Jan 11, 2005

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