Accession Number:

AD0679181

Title:

VELOCITY DECAY IN THE INTERMEDIATE WAKE REGION BEHIND HYPERSONIC SPHERES

Descriptive Note:

Technical note

Corporate Author:

CANADIAN ARMAMENT RESEARCH AND DEVELOPMENT ESTABLISHMENT (QUEBEC)

Personal Author(s):

• Lahaye, C.
• Heckman, D.

Report Date:

1968-05-01

Pagination or Media Count:

14.0

Abstract:

Axial velocity decay data for hypersonic sphere wakes obtained with the sequential spark and probe array techniques were fitted with an equation of the form V sub wV sub infinity symbol C sub 1 XD raised to the power C sub 2. This power law is found to fit the data very well for axial distances between 300 and 1000 body diameters behind the body. Values of C sub 1 and C sub 2 obtained from sequential spark measurements are given as a function of radial distance from the wake axis. Near the axis, the absolute value of C sub 2 is slightly greater than unity, decreasing to about one-third at radial distances of about two body diameters.

Descriptors:

• *SPHERES
• HYPERSONIC CHARACTERISTICS
• LEAST SQUARES METHOD
• PROJECTILES
• RELAXATION TIME
• VELOCITY
• WAKE

Subject Categories:

• Aerodynamics
• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE