Accession Number:
AD0739250
Title:
Drag Coefficients of Spheres in Hypersonic Non-Continuum Flow.
Descriptive Note:
Final rept. 1 Oct 68-31 Jul 70,
Corporate Author:
VON KARMAN INST FOR FLUID DYNAMICS RHODE-SAINT-GENESE (BELGIUM)
Personal Author(s):
Report Date:
1971-11-30
Pagination or Media Count:
43.0
Abstract:
A modulated force probe with a sensitivity in the microgram range was employed to measure the drag forces on spheres in the Mach 5 range with an R.M.S. error of or - 1. Flow properties in the free jet were used to calculate sphere drag coefficients. The resulting values cover the flow regimes from near-free-molecule to transitional. A correlation parameter - an effective Knudsen number based on body-free stream molecular collisions - is shown to provide a reasonable correlation for a large variety of sphere drag measurements.
Descriptors:
Subject Categories:
- Guided Missile Reentry Vehicles
- Fluid Mechanics