Acoustic wave control using glow discharge plasma

Vladimir Soukhomlinov, V. Stepaniuk, C. Tarau, V. Ötügen, V. Sheverev, Ganesh Raman

Research outputpeer-review

Abstract

The reflection of sound waves by glow discharge plasma was studied theoretically. The main thrust of the investigation was to determine the effectiveness of using glow discharge plasma as a tool in flow control applications. Plasma offers a unique possibility of flow control by remotely introducing energy into the gas medium. In can be generated in a target region of the gas using electromagnetic radiation. Recent experiments demonstrated that a plasma "sheet" attenuate a sound wave by up to 10 dB1. In the present work, sound wave reflection from the gas-plasma boundary is analyzed theoretically. Based on Euler's equations, a onedimensional equation for propagation of the sound wave through a gas with temperature gradients is derived, which was found to be identical to the classical Schroedinger's equation for propagation of the quantum particle through a potential barrier. An analytical solution for the sound reflection coefficient is obtained. The values of the reflection coefficients calculated for realistic temperature distributions in the gas-plasma boundary are encouraging and indicate that glow discharge plasma, indeed, may be a viable method for aeroacoustic control. The analytical results for the onedimensional acoustic wave propagation through plasma agree well with numerical results, which are obtained using the unsteady one-dimensional Euler's equations using a second-order accurate finite difference scheme.

Original languageEnglish
Title of host publication1st Flow Control Conference
Publication statusPublished - 2002
Event1st Flow Control Conference 2002 - St. Louis, MO
Duration: 24 Jun 200226 Jun 2002

Conference

Conference1st Flow Control Conference 2002
CountryUnited States
CitySt. Louis, MO
Period24/06/0226/06/02

Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Aerospace Engineering
  • Control and Systems Engineering

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