Analysis of total resistance for different ship speeds

The paper shows method for analyzing total resistance of ship which calculated on Froude numbers from 0.14 to 0.41. To this method the hull surface divides into its component surfaces to the ship length. This approach allows to calculate the distribution of resistance forces along the ship length. Based on this data hull zones for correcting can be selected, and a better comparison of several hull can be made. First of all mathematical scheme of total resistance calculating develops and validates in the OpenFOAM software. The standard solver interDyMFoam and DTMB 5415 hull data uses. Three grids uses for mesh convergence. To implement the proposed method the DTMB 5415 hull divides into 22 surfaces along the length. According to the results of numerical simulations the curves of distribution of resistance force along the hull length for the different ship speeds obtain. Due to analysis of curves two versions of hull develops based on DTMB 5415 hull: without bulb and with streamlined bulb. Both hulls have lower resistance at all speeds compared to the DTMB 5415 base hull. Due to analysis of resistance force distribution curves of new hulls distributed resistance force on middle and stern parts of hull does not depend on ship speed and stem part lines. Stem part of hull has the most important influence on total resistance.