Acoustic Transducer of Turbulent Pressure Fluctuations
in a Temperature-Stratified Medium
E. B. Kudasheva, *, L. R. Yablonikb, **, and Jian-hua Liuc
Translated by A. Seferov
aSpace Research Institute, Russian Academy of Sciences, Moscow, 117997 Russia
bJoint-Stock Company “I.I. Polzunov Scientific and Development Association on Research and Design of Power Equipment”,
St. Petersburg, 191167 Russia
cChina Ship Scientific Research Center, Wuxi, Jiangsu, 214082, China
Correspondence to: *e-mail: kudashev@iki.rssi.ru
Correspondence to: **e-mail: yablonik@gmail.com
Received 29 March, 2017
Abstract—The operation of an acoustic transducer in a temperature-stratified medium is investigated. The formation of a response of piezoceramic transducers of pressure fluctuations under the action of temperature fluctuations in a working medium on the sensor element is considered. The attenuation of the temperature signal of a pressure transducer in a turbulent boundary layer is calculated numerically. The effect of distortions of the spectral levels of pressure fluctuations detected by a sound transducer in the field of temperature inhomogeneities is investigated for the example of measurements of turbulent pressure fluctuations in a boundary layer during vertical ascent of the device to the surface from a specified depth in a deep sea.
Keywords: turbulent boundary layer, pressure fluctuations, temperature-stratified medium, acoustic transducer, pyroelectric effect
DOI: 10.1134/S1063771018010116