Accession Number:

AD0272241

Title:

MICROWAVE STUDIES OF FLOW FIELDS AROUND HYPERVELOCITY PROJECTILES

Descriptive Note:

Corporate Author:

GENERAL DYNAMICS CORP POMONA CA POMONA DIV

Personal Author(s):

• SCHOONOVER, M.
• SIPERLY, B.
• SHORT, W.

Report Date:

1961-06-30

Pagination or Media Count:

34.0

Abstract:

The flow surrounding hypersonic bodies in the atmosphere is studied experimentally and theoretically to explain the observable properties of re- entry nose cones. The experimental studies were performed in a ballistic range using blunt plastic models traveling at velocities up to 26,000 fps. The bodies and their wakes were observed with microwave equipment at 2 frequencies, a schlieren system and an UV detector. What appeared to be a transition from laminar to turbulent flow in the wake was detected at 1 mm Hg. The theoretical analysis required to compute the number of electrons per unit length of wake was completed. It was also shown theoretically that the electron concentration as a function of radial distance in the wake can be computed from microwave reflections at several frequencies.

Descriptors:

• *ATMOSPHERE ENTRY
• *HYPERVELOCITY PROJECTILES
• *WAKE
• AERIAL TARGETS
• AIR FORCE OPERATIONS
• BLUNT BODIES
• COMPUTER PROGRAMMING
• DATA PROCESSING
• DIGITAL COMPUTERS
• GAS IONIZATION
• GUIDED MISSILES
• HYPERSONIC CHARACTERISTICS
• JET FIGHTERS
• LAMINAR BOUNDARY LAYER
• LAUNCHING SITES
• MICROWAVES
• MODEL TESTS
• NOSE CONES
• PLASMA SHEATHS
• PLASMAS(PHYSICS)
• REENTRY VEHICLES
• REFLECTION
• REFUELING
• SCHEDULING
• SURFACE TO SURFACE
• TANKER AIRCRAFT
• TURBULENCE
• WARFARE
• WIND TUNNEL MODELS

Subject Categories:

• Spacecraft Trajectories and Reentry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE