Aerodynamic Drag on Spiked Blunt Bodies in Low-Density Hypersonic Flow

Item

Title
Aerodynamic Drag on Spiked Blunt Bodies in Low-Density Hypersonic Flow
Date
1964
Index Abstract
Coming Soon
Photo Quality
Incomplete
Report Number
AEDC TDR 64-160
Creator
Sims, William H.
Hahn, Jerry S.
Corporate Author
ARO, Inc.
Extent
21
NTRL Accession Number
AD603567
Identifier
AD0603567
Distribution Classification
1
Contract
AF 40(600)-1000
DoD Project
None Given
DoD Task
None Given
DTIC Record Exists
Yes
Distribution Change Authority Correspondence
None
Abstract
Aerodynamic drag on spiked blunt bodies was measured in hypersonic, low-density flow of nitrogen. Two models were tested: a spherically capped cone of 10-deg halfangle at 0 < alpha < 40 deg, and a right circular cylinder at alpha = 0. Reynolds numbers, based on total body lengths and free-stream conditions, varied from 200 to 1200. Mach number was constant at 10.1. Results were compared with modified Newtonian and free-molecule calculations. Effects of hypersonic rarefied flow are apparent, with drag coefficient increasing for large angles of attack for all spike lengths. A correlation procedure suggested in an earlier report for a large class of similar bodies at 0-deg angle of attack is shown to be effective in the case of spiked bodies too. It is apparent that the marked reduction of drag effected by use of spikes on blunt-nosed bodies at higher Reynolds numbers is greatly diminished when low Reynolds numbers exist. However, a moderate reduction is shown for small angles of attack at the Reynolds numbers of the present experiment.
Report Availability
Full text available by request
Date Issued
1964-08
Publisher
Arnold Air Force Station, TN : Arnold Engineering Development Center, Air Force Systems Command, United States Air Force
Provenance
IIT
Type
report
Format
21 pages ; 28 cm.

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