VELOCITY CORRELATION MEASUREMENTS IN THE MIXING REGION OF A JET,

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)

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1963
Accession Number
AD0436673

Entities

People

  • Marc A. Kolpin

Organizations

  • AGARD

Tags

DTIC Thesaurus Topics

  • Aerodynamics
  • Convection
  • Demographic Cohorts
  • Diameters
  • Flow
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Measurement
  • Mechanics
  • Motion
  • Physical Properties
  • Training
  • Turbulence
  • Turbulent Flow

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster