Numerical Investigation of the Effects of Underwater Aft Cone Angle and Length-to-Beam Ratio on Hull Efficiency

Year 2017, Issue: 208, 71 - 88, 11.07.2017

Yasemin Arıkan Özden Fahri Çelik

Abstract

The use of submarines in
military, touristic, oceanographic surveys and seashore areas has increased in
recent years. Much of the scientific research in submarine hydrodynamics has
focused on the issues of acoustics and propulsion. One of the most important
differences from the submarine dimensions in determining the propulsion
characteristics is to define the angle of the stern cone. In this study, the
effect of stern cone angle and aspect ratio (L / B) on hull efficiency is
investigated by a computational fluid dynamics method (HAD). DARPA Suboff
submarine is derived for different stern cone and different L / B ratios, so
that displacement volume remains constant. For different submarine geometries,
resistance and propulsive properties were investigated by performing flow
analysis with/without propeller. The effect on the propeller-body interaction
of the stern cone is given as the thrust deduction, the effective wake
coefficient and the hull efficiency.

Keywords

Submarine, Wake coefficient, Thrust deduction, Hull Efficiency, Cone Angle, Computational-Experimental Fluid Dynamics

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