Reflection and transmission of acoustic waves from a moving layer /
George G. Steinmetz and Jag J. Singh.

Description

Main Author

Steinmetz, George G.

Related Names

Singh, Jag J.
Langley Research Center.
United States. National Aeronautics and Space Administration.

Language(s)

English

Published

Washington, D.C. : National Aeronautics and Space Administration : 1972.

Subjects

Space vehicles.
Refraction.
Dummy variables.

Summary

The refraction of acoustic waves by a moving medium layer is theoretically treated and the expressions for reflection and transmission coefficients are determined. The moving medium layer velocity is assumed to have a space dependence in one direction. A partitioning of the moving medium layer into constant-velocity sublayers is introduced and the number of sublayers is allowed to increase until the reflection and transmission coefficients converage to their respective values. Numerical results for several sublayer approximations of Poiseuille's flow are presented as functions of the moving layer velocity for several angles of incidence of the acoustic wave. The degenerate case of single constant-velocity layer is also treated, both theoretically and by a numerical analysis.

Physical Description

21 p. : ill. ; 27 cm.

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