Abstract:

A computational study based on the Cartesian grid method and Euler solver for the three-dimensional inviscid flow around a fin with a bulge has been conducted. Compared with the fin without bulges, the aerodynamic characteristics of the a fin with a bulge are changed, especially for the drag. This paper explains the general issues of the grid generation and Euler solver. The computational Mach contours agree well with the corresponding experimental ones. Effects of the existence and position of a bulge have been discussed.

Key words: bulge, fin, Euler equations, octree structure, Cartesian grid