Numerical Study on Effect of the Length of the Spike Attached to the Blunt Nose on Drag reduction
The present work is a description of flow field around a hemispherical nose cylinder model with a spike in the free stream of Mach number of 6. In this numerical analysis, axisymmetric Reynolds-averaged Navier-Stokes equations are solved using AUSM flux splitting and standard k-ε turbulence model. The results are validated with an experimental study. The purpose of this paper is to study the effect of length of the spike attached to the blunt nose on drag reduction compared to without spike blunt nose. The lengths of the spike are considered 1.5 and 2 times of the base diameter of the model. The results for spiked-body show a significant reduction of the total drag coefficient. Also the model with more spike length has almost more drag reduction.