Base Drag of Noncircular Irregular Shaped Bodies at High Speeds

Abstract

If flow velocity equals sound velocity, base drag coefficient is a significant part of drag coefficient and it depends on variety of flow and geometrical parameters. Drag, base drag, drag coefficient and base drag coefficient for four bodies with same width, height and length and different shape are estimated by CFD (ANSYS Fluent) at high speeds. For different rear surface curvature, at high flow velocity, share of base drag at drag of body and flow field as contour of vector of velocity coloured by pressure are shown and analysed.