Accession Number : AD0257055

Title :   SPIKED BLUNT BODIES IN SUPERSONIC FLOW

Corporate Author : COLORADO UNIV BOULDER ENGINEERING EXPERIMENT STATION

Personal Author(s) : ALBUM,HYMAN H.

Report Date : JUN 1961

Pagination or Media Count : 1

Abstract : The force and moment characteristics of spiked bodies with hemispherical, hemispherical-flat, and flat noses were determined in a supersonic wind tunnel at angles of attack from zero to 10 degrees. The afterbodies were right circular cylinders. A fineness ratio of 3 was maintained for all of the basic bodies. The spikes were of five different configurations and ranged in length from 0.75 to 2.0 body diameters. Freestream conditions included Mach numbers from 2.0 to 3.0 and Reynolds numbers from 300,000 to 900,000 (based on body diameter). It was found that the spikes greatly reduced the zero-angle drag, made the drag extremely sensitive to angle of attack variations, substantially increased the lift, and also increased the normal force. The body nose shape proved to be a critical factor in determining the magnitude of these characteristics and whether or not the spikes would have a stabilizing effect on the body pitching moment characteristics. (Author)

Descriptors :   *AERODYNAMIC CONFIGURATIONS, *BLUNT BODIES, *DRAG, *SPIKES, AERODYNAMIC CHARACTERISTICS, CYLINDRICAL BODIES, FLUID MECHANICS, GAS FLOW, REDUCTION, STABILITY, SUPERSONIC FLOW, WIND TUNNELS

Distribution Statement : APPROVED FOR PUBLIC RELEASE