Flow-field characteristics and normal-force correlations for delta wings from Mach 2.4 to 4.6An experimental investigation has been conducted to determine the upper-surface flowfield types and the normal-force characteristics of a series of delta wing models at supersonic speeds. Flow-visualization data were used to classify the flowfields into seven primary types: shockless attached flow, separation bubble, classical vortex, vortex with shock, shock with no separation, shock-induced separation, and separation bubble with shock. The pressure distributions were integrated to obtain upper and lower surface normal-force loadings. A minimal effect of sweep was observed on the upper-surface normal force at constant Mach number and a minimal effect of Mach number was noted for the 75 deg delta wing lower-surface normal force. The normal-force coefficients for all test conditions were correlated, and a single empirical equation was formulated from which the normal-force coefficient could be calculated as a function of Mach number, angle of attack, and wing aspect ratio.
Document ID
19890037651
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Covell, Peter F. (NASA Langley Research Center Hampton, VA, United States)
Wesselmann, Gary F. (USAF, Arnold Engineering Development Center Arnold Air Force Station, TN, United States)