Experimental determination of the integral scale of turbulence in the boundary layer
Abstract
It is shown that conventional methods (Taylor's method, the FriedmannKeller method) of determining the scale of turbulence are unsuitable under conditions of inhomogeneous wall flow, the chief reason being that the distribution of the integral scale of turbulence will depend on the choice of transverse coordinate. In regions where the values of the correlation coefficient along lines of equal scale of turbulence do not depend on the mean transverse coordinate, it is proposed that the correlation coefficient be represented as a function of the dimensionless parameter eta/Ly, where eta is the distance between probes and Ly is the integral scale of turbulence. Close to the wall, the scale of turbulence can be represented as a function of the correlation coefficient if the distance between probes is sufficiently small that the turbulence can be considered locally homogeneous.
 Publication:

Akademiia Nauk SSSR Sibirskoe Otdelenie Izvestiia Seriia Tekhnicheskie Nauki
 Pub Date:
 February 1978
 Bibcode:
 1978SiSSR........3D
 Keywords:

 Flow Measurement;
 Nonuniform Flow;
 Turbulent Boundary Layer;
 Wall Flow;
 Boundary Layer Equations;
 Correlation Coefficients;
 Flat Plates;
 HotWire Anemometers;
 Scale (Ratio);
 Fluid Mechanics and Heat Transfer