PREDICTION OF AERODYNAMICCHARACTERISTICS FOR SLENDER BLUFF BODIES WITH DIFFERENT NOSE CONE SHAPES
Journal Title: International Journal of Mechanical and Production Engineering Research and Development (IJMPERD ) - Year 2017, Vol 7, Issue 2
Abstract
In this work, the numerical approach is used to verify the aero/hydrodynamic performance of different geometries of nose cones. Computational methods predict the flow characteristics fairly accurately in order to validate the data obtained from experiments. The simulation involves muzzle velocity that range from 5m/s to 25 m/s i.e. 1.69 to 8.4 x 105and calculated for the different angle of attack, -10 to 20 degrees, to demonstrate the flow behavior around the shells. Nosecone is the most forward section of any slender moving bodies which are used in rockets, guided missiles, submarines, aircraft drop tanks and aircraft fuselage to reduce the aerodynamic or hydrodynamic drag. The basic geometry of bluff body is cylinder with variant nosecone shapes such as flat and tapered head, with moderate to low taper ratios and conical head. The aerodynamic behavior of the cylinder structures, lift, drag, and pressure distribution are illustrated for low subsonic speed. Better results are obtained for cylinder with conical head and cylinder with shapes having low and medium taper show approximately similar results.
Authors and Affiliations
VASISHTA BHARGAVA, YD DWIVEDI
Keywords
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