Experimental Determination of the Subsonic Aerodynamic Characteristics of an Ogive-Cylinder Body Including a Comparison with Theoretical Estimates. Volume 1

摘要

Wind tunnel tests made on an ogive cylinder body of 6:1 fineness ratio are reported. The distribution of pressure on the body was measured over an incidence range of -1 to 10 degrees. The local loading distributions were obtained by integration of the pressure coefficients; further integration yielded the overall normal force and pitching moment coefficients and hence the center of pressure position. It is shown that the aerodynamic characteristics are very sensitive to conditions in the base region and that unexpectedly large loadings are present over the last 10% of the body length. It is indicated that the bluff asymmetric model support system may be the source of some additional interference effects at the higher incidences, even though it is some 3.7 body diameters downstream of the base. The experimental results are compared with theoretical estimates obtained by an inviscid ring-source method of estimation for axisymmetrical bodies.