Accession Number : AD0436673

Title :   VELOCITY CORRELATION MEASUREMENTS IN THE MIXING REGION OF A JET,

Corporate Author : ADVISORY GROUP FOR AERONAUTICAL RESEARCH AND DEVELOPMENT PARIS (FRANCE)

Personal Author(s) : Kolpin, Marc A.

Report Date : APR 1963

Pagination or Media Count : 17

Abstract : Measurements of space-time correlations of the u-component of turbulence in the mixing region of a jet are presented. It is shown that the longitudinal correlation function depends only on nondimensional quantities. On a given cylinder, the convection speed of the turbulent field was different for the different eddy sizes, varying from the local mean speed for small eddies to half the local mean exit-speed for the large eddies. The lateral correlation function for zero time delay is shown to be monotonically decaying with increased wire separation. Measurements of the angular correlation function are reported which show no correlation of the fluctuations across the diameter of the jet. (Author)

Descriptors :   (*JET MIXING FLOW, TURBULENCE), MODEL TESTS, CYLINDRICAL BODIES, WIRE, ANEMOMETERS, ANALOG SYSTEMS, DATA PROCESSING, CORRELATION TECHNIQUES, FLUID FLOW, VELOCITY, SHEAR STRESSES, VORTICES, STABILITY, AERODYNAMIC CHARACTERISTICS, NOISE.

Distribution Statement : APPROVED FOR PUBLIC RELEASE