Accession Number : AD0618460

Title :   MEASURED TRANSITION FROM LAMINAR TO TURBULENT FLOW AND SUBSEQUENT GROWTH OF TURBULENT WAKES,

Corporate Author : MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s) : Clay,W. G. ; Labitt,M. ; Slattery,R. E.

Report Date : 08 SEP 1964

Pagination or Media Count : 5

Abstract : Turbulent transition distances and growth of turbulent wakes behind 3/16-in. copper-clad aluminum spheres traveling through rarefied air at 18,000 to 20,000 fps are presented. The data are taken by two independent methods: twin schlieren systems (optical) and a UHF microwave cavity (electronic). The turbulent transition distances are measured to several thousands of sphere diameters at the lower pressures by both methods. Turbulent wake widths are also determined by both techniques and the 1/3 power growth rate is confirmed for these velocities. (Author)

Descriptors :   (*WAKE, TURBULENCE), (*LAMINAR FLOW, TURBULENCE), (*SPHERES, TURBULENCE), COPPER, VACUUM, SCHLIEREN PHOTOGRAPHY, MICROWAVE EQUIPMENT, PHYSICAL PROPERTIES, HYPERVELOCITY PROJECTILES, ABLATION, ELECTRONS

Distribution Statement : APPROVED FOR PUBLIC RELEASE