Introduction of Iranian Hydrodynamic Series of Submarines (IHSS)

Introduction of Iranian Hydrodynamic Series of Submarines (IHSS)

This paper introduces and describes Iranian hydrodynamic series of submarines (IHSS) and for describing this series the submarine geometry and non-dimensional ratios are described. IHSS is a new Simple and useful instrument for hydrodynamic design of submarine that is introduced in this paper for first time. Standard series for ships and boats have been very common and applicable such as Series 60, Series 62 and Series 64, but for describing the hull of submarine there have not ever been any series. IHSS uses a special 15 digit code for each submarine hull and each code generally describes the geometry. The manner of this coding is presented in this paper. The main advantage of IHSS compared to other standard series is the presentation of hydrodynamic characteristics such as hydrodynamic coefficients for designing and calculating the maneuvering and resistance. Because of that, IHSS is named a hydrodynamic series. The main basis of this series for providing hydrodynamic characteristics is CFO method but in some cases the physical model test results will be used to validation of the results. In this paper only the general discussions about IHSS and coding are presented and the hydrodynamic results will be present in next papers. For providing general application of this series for all arbitrary tonnages and dimensions, descriptions of geometries are, firstly based on non-dimensional ratios and secondly, the geometries are considered as simple as possible so that the designers can select initial geometry from IHSS as a base and then the variations can be applied on it. Basis of submarine shape in IHSS is parallel middle body shape because the most usual shapes of today's submarines are such. The end part is conical without propeller, and the bow is elliptical.