EXPERIMENTAL INVESTIGATIONS OF HYPERSONIC FLOW AROUND TWO-DIMENSIONAL CIRCULAR CYLINDERS.

Abstract : The paper describes an experimental investigation of the flow phenomena about a two-dimensional circular cylinder in a hypersonic stream. The purpose of the investigation was to record properties of the flow regions which have a direct effect on the wake behind a twodimensional circular cylinder. All data were obtained at a nominal Mach number of 14 and a stagnation temperature of 1800R. The total pressure settings were between 600 and 2000 psia, although the majority of the data was taken at 1000, 1200, 1400, or 1600 psia. Model diameters varied from 1/4 to 3/4 inch, however tests about 3/8 and 1/2 inch diameter models were most common. Data concerning pressure distributions at the body, in the base flow region and near wake were obtained. In addition, some qualitative results were obtained with the hot wire anemometer at the body surface. (Author)