SAIL POSITION AND NOTCH-TAIL MODIFICATION TO REDUCE THE DRAG OF A MINI SUBMARINE

The aim of the research work was to investigate the position of sail and the additional notch on tail of a mini submarine to reduce the force resistance. The tail position parameter was modelled as the ratio of the submarine the total length of the hull (L) to the sail distance (X), whereas the notch was represented by several notch designs. Computational Fluid Dynamic (CFD) simulation routines were conducted to examine the investigated two design parameters, i.e. sail position and notch configuration. Once the optimal model of the sail position was obtained, the additional notches model were tried. The simulation results show that the best position of the sail is when the L/X ratio is 3 and the notch model is T1 (three go around notches) in standard HT05 airfoil. The selected configurations provide the optimized sail position and notch model for the designed mini submarine.