Accession Number : AD0634036

Title :   ORDER OF MAGNITUDE OF RADIATION FROM TURBULENT FLOW AND TURBULENCE EXCITED STRUCTURAL VIBRATION.

Descriptive Note : Technical rept.,

Corporate Author : J G ENGINEERING RESEARCH ASSOCIATES BALTIMORE MD

Personal Author(s) : Greenspon,Joshua E.

Report Date : DEC 1965

Pagination or Media Count : 27

Abstract : Expressions are derived for the cross spectral density of the far field pressure resulting from the vibration of an elastic surface excited by turbulence and from a rigid surface over which there is turbulent flow. The plate problem is worked out in detail and it is shown that for frequencies of the order of the resonance of the lowest plate modes the radiati4n is due primarily to elastic vibration, whereas at high frequencies corresponding to higher resonant modes in the plate the turbulent flow alone can b responsible for part of the radiation. The basic formulas are also derived for the cylinder. (Author)

Descriptors :   (*TURBULENCE, *VIBRATION), (*STRUCTURES, VIBRATION), MECHANICAL WAVES, STATISTICAL FUNCTIONS, CYLINDRICAL BODIES

Subject Categories : Fluid Mechanics
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE