Sensitivity Analysis of Hydrodynamic Coefficients for a Submarine by Indirect Method for Evaluation and Optimization of its Maneuverability

One of the essential subjects, affecting on submarine's performance is a comprehensive knowledge of its maneuverability and sensitivity to change hydrodynamic parameters. The hydrodynamic parameters are assessable by experiments which are directly related to geometric and environmental parameters. Since these coefficients are the result of the fluid-structure interaction, they have a degree of uncertainty and are not constants. The main objective of this paper is to evaluate the sensitivity of the hydrodynamic coefficient of a submarine to understand the its response to uncertainty of these coefficients. In this research, the dependence of hydrodynamic momemt to circular maneuverability diameter resulted by rudders was investigated. Furthermore, low sensitivity of drag coefficients against lift coefficients by control surfaces and submarine body were also considered. Increasing of lift coefficient related to maneuverability and decreasing the drag in slowness and stability of submarine are of the other outcomes.