Accession Number : AD0905053

Title :   The Relationship of Dynamic Pressure Fluctuations to Velocity Fluctuations.

Descriptive Note : Technical rept.,

Corporate Author : NAVAL UNDERWATER SYSTEMS CENTER NEWPORT R I

Personal Author(s) : Goodman,Louis ; Massey,Alan T.

Report Date : 11 OCT 1972

Pagination or Media Count : 30

Abstract : The pressure fluctuations on the surface of a body moving through a field of homogeneous turbulence are related to the velocity of fluctuations of the field. The results of the deformation theory of Massey and Goodman are used in Poisson's equation for pressure fluctuations to relate the two-point pressure correlation spectrum sensed by the body to the two-point velocity correlation spectrum occurring in the turbulent field before the body was introduced. How the deformation affects the frequency dependence of the sensed dynamic pressure is shown. The results are applied to the pressure autocorrelation on the surface of a two-dimensional body, predicting its specific frequency dependence in terms of the underformed turbulent velocity spectrum. (Author)

Descriptors :   (*FLUID FLOW, UNDERWATER ORDNANCE), DEFORMATION, TURBULENCE, PRESSURE, INTERACTIONS, VELOCITY, FLOW FIELDS, VISCOSITY, BOUNDARY LAYER, STAGNATION POINT, TWO DIMENSIONAL FLOW, VIBRATION, SHELLS(STRUCTURAL FORMS), INTEGRAL EQUATIONS, INTEGRAL TRANSFORMS, MAPPING(TRANSFORMATIONS), PARTIAL DIFFERENTIAL EQUATIONS, CONFORMAL MAPPING, HYDRODYNAMICS, FLUID DYNAMICS

Subject Categories : Numerical Mathematics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE