An Experimental Investigation of the Flowfield around a Yawed Cone

An experimental investigation of the flowfield associated with a highly yawed five degree half-angle cone has been conducted in the wind tunnels at the U.S. Naval Ordnance Laboratory (NOL). The measurements, obtained for the most part at Mach 5, included surface pressure distributions, flow visualization photographs, and leeward side flowfield surveys. Analysis of these results indicates that the flowfield associated with a highly yawed cone at high supersonic velocities resembles that of a circular cylinder in a supersonic crossflow. The essential difference between these flowfields is the presence in the cone flowfield of a "vortical singularity like" gradient which separates the flow traversing the stronger portion of the shock wave on the windward side from the flow traversing the weaker portion of the shock wave on the leeward side.