Accession Number : AD0754422

Title :   Fluctuating Pipe Pressures Produced by Modulated Jet Flow.

Descriptive Note : Technical rept.,

Corporate Author : NAVAL ACADEMY ANNAPOLIS MD MICHELSON PHYSICAL LAB

Personal Author(s) : Elder,Samuel A.

Report Date : DEC 1972

Pagination or Media Count : 65

Abstract : The precise way in which sound pressure fluctuations are produced by the interaction of a jet and resonator remains in dispute. The report suggests that two current theories for the sound production mechanism may be comprehended by a more general approach, based on conservation of linear momentum and conservation of mass. Equating force per unit area exerted by the jet on a control volume containing the mixing region to the difference in pressure along the pipe axis leads to an expression for acoustic particle velocity in the standing wave as a function of the jet driving flow spectrum. (Author)

Descriptors :   (*VIBRATION, ACOUSTIC PROPERTIES), RESONATORS, INTERACTIONS, GAS FLOW, WAVE PROPAGATION, THEORY, MATHEMATICAL MODELS, SOUND GENERATORS

Subject Categories : Acoustics
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE