Optimization on submarine stern design

Abstract

This article discusses the optimum hydrodynamic shape of the submarine stern based on the minimum resistance. Submarines consist of two major categories of hydrodynamic shape: the teardrop shape and the cylindrical middle-body shape. Due to the parallel middle-body shape in most of the naval submarines, those with cylindrical middle-body are studied here. The bare hull has three main parts: bow, cylinder and stern. This article proposes an optimum stern shape by the computational fluid dynamics method via Flow Vision software. In the hydrodynamic design point of view, the major parameters of the stern included the wake field (variation in fluid velocity) and resistance. The focus of this article is on the resistance at fully submerged mode without any regard for free surface effects. First, all the available equations for the stern shape of submarine are presented. Second, a computational fluid dynamics analysis has been performed according to the shape equations. For all the status, the following parameters are assumed to be constant: velocity, dimensions of domain, diameter, bow shape and total length (bow, middle and stern length).

Hydrodynamic Force of Resistance of Tourist Underwater Vehicle’s Bare Hull with Diff erent Heads using OpenFOAM

“…Parametric equations for the spherical and elliptical bow and stern read: for spherical bow and stern (3) for elliptical bow (4) for elliptical stern (5) To satisfy the symmetry boundary condition for around the domain, the domain length (L t ) and diameter (D t ) were considered as L t =1.4L oa and D t =4D s , respectively [29].…”

“…Optimization of the bare hull form of submarine was presented in [4], while DREA (Defense Research Establishment * Corresponding author Atlantic) model, as one of the standard bare submarine hull forms is proposed [5][6]. DREA model specifi es the bare hull in three parts: bow, mid-body, and tail.…”

“…As mentioned earlier, submarines and other UVs designs should incorporate hydrodynamic shaping, and some research has been conducted on optimizing submarine bare hull forms [4][5][6][7][8][9]. In this regard, , the purpose of this paper is to present Computational Fluid Dynamics (CFD) analysis of UV's bare hull geometry with spherical heads (S-S), spherical bow and elliptical stern (S-E), and both elliptical heads (E-E) (see Figure 1), with respect to the forward speed in the infi nitely deep water.…”

Bodies-of-revolution in turbulent flow: comparing computation with experiment

“…The body consisted of three parts -the bow section (0< / <2.67), the cylindrical recovery section (2.67< / <10), and the stern section (10< / <12.67). The bow section is a half prolate spheroid , the recovery section has a constant diameter , and the contour of the stern follows a 4th-order power law to minimize the drag [3]. The body was rigidly supported by an aerodynamically shaped sting (NACA 0015) (more detail of the set-up is given in Ding et al [1]).…”

Optimum design of acoustic stealth shape of underwater vehicle model with conning tower

“…The next work [5] involved examining an underwater vehicle or torpedosegmented bare hull (bow, middle, and stern) using different linear CFD calculations and comparing the results to obtain an underwater vehicle hull shape with less resistance. Using the CFD method and FLOW VISION software, the optimal L/D of the hydrodynamic shape of a cylindrical hull was proposed [6].…”