Accession Number : AD0612168

Title :   AN EXPERIMENTAL STUDY OF TURBULENT BOUNDARY LAYER STRUCTURE.

Descriptive Note : Final rept.,

Corporate Author : COLORADO STATE UNIV FORT COLLINS FLUID DYNAMICS AND DIFFUSION LAB

Personal Author(s) : Plate, E. J. ; Sandborn,V. A.

Report Date : DEC 1964

Pagination or Media Count : 49

Abstract : The report covers work done in preparation for a systematic investigation of the nature of aerodynamic roughness, and of the effect of thermal stratification on the turbulence structure in forced convection environments over rough and smooth surfaces. The investigations are based on data taken in a meteorological wind tunnel. After completion of the tunnel check out, exploratory measurements were made of the distributions of velocity and temperature in a thermally stratified flow (of unstable stratification) and of the velocity profiles above small sample plates covered with different types of sand roughness. A study of the flow of air over flexible roughness was the first comprehensive study which lead to definite conclusions. While the wind tunnel was readied for experimental work, side studies were undertaken for developing techniques for measuring profiles of mean velocities and mean temperatures, and for measuring fluctuations of temperatures and of velocities.

Descriptors :   (*TURBULENT BOUNDARY LAYER, SURFACES), VELOCITY, TEMPERATURE, AERODYNAMIC CHARACTERISTICS, GAS FLOW, SURFACE PROPERTIES, THERMAL PROPERTIES, DISTRIBUTION, RESISTANCE THERMOMETERS, THERMOCOUPLES, WIND TUNNELS, CALIBRATION, PRESSURE, MEASUREMENT, MATHEMATICAL ANALYSIS

Distribution Statement : APPROVED FOR PUBLIC RELEASE