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:

1972-12-01

Pagination or Media Count:

65.0

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