Effect of sharp/oblate nose on a model subsonic rocket measured by PIV

Abstract

What is the difference between the wake past a rocket with sharp nose or with oblate nose? The measurement by Particle Image Velocimetry tries to answer at velocities 5 – 20 m/s (i.e. Reynolds numbers 20 thousand to 79 thousand). A simple model rocket is 3D printed with body diameter of 60 mm, total height 4 D, i.e. 240 mm. The maps of mean stream-wise velocity, stream-wise fluctuations and span-wise fluctuations are compared.