Accession Number : AD0288656

Title :   AERO-FORCES ACTING ON A BLUNT BODY WITH SEPARATED FLOW

Corporate Author : CALIFORNIA UNIV BERKELEY INST OF ENGINEERING RESEARCH

Personal Author(s) : YUEN,YUN-SING

Report Date : 30 OCT 1962

Pagination or Media Count : 1

Abstract : Normal and axial force coefficients were calculated theoretically for a blunt body. Concurrently, aerodynamic forces acting on a model of the same body type were measured in a supersonic, rarefied gas flow at a Reynolds number of 2260 per inch and nominal Mach number of 4.0, so that the laminar separation was involved in the area bounded by the cylinder and cone. The experimental results, plotted in coefficient form, were compared to the theoretical predictions which consisted of Newtonian hypersonic theory with viscous corrections. The axial force coefficients based on the experimental data were within 3% of the predicted values at low angles of attack (less than 6 degrees). The experimental normal force coefficients ere adequately predicted with a similar trend by the theoretical analysis with a maximum error of about 15% over the entire range of both angle of attack and center body positi n. (Author)

Descriptors :   *AERODYNAMIC CHARACTERISTICS, *AXIALLY SYMMETRIC FLOW, *BLUNT BODIES, *BOUNDARY LAYER, *DRAG, *LIFT, *SUPERSONIC FLOW

Distribution Statement : APPROVED FOR PUBLIC RELEASE