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Submarine Resistance Force Characteristics Determination After Modification of Depth Rudder System

Kiciński Radosław, Jurczak Wojciech

Advances in Science and Technology. Research Journal

2021

Vol. 15, no 1

1--9

A submarine, as a technical object, has many systems which are necessary for operation. In addition to the weapon systems, there are many systems required for the safe operation under the water. The submarine steering system is one of them. The article presents the principle of operation and the modification concept of the stern rudders of the project 207 (Kobben class) submarine. On the basis of measurements, the resistance force characteristics were determined. A calculation model was proposed using CFD (Computational Fluid Dynamics) and CAE (Computer Aided Engineering) techniques to determine the resistance force characteristics during the design stage. Then, the measured resistance force characteristics were used to verify the calculation model. Using the proposed method, the resistance force characteristics for an existing submarine were determined, and then its modification was proposed. The simulation results for the modified rudder design allowed determining the reduction of the ship resistance force for the new solution. Lower resistance force means lower demand for electrical power in the engine room, which consequently affects the operational safety by increasing maneuverability and improving the immersion curve. The proposed modification enables to reduce the power consumption by about 8 kW and reduced the resistance force by 2%, which increased the ship’s autonomy.

Mechanical Coupled BLDC Motors for Energy Saving in Submarine Application

Isfahani A. H., Ahmadi F.

Przegląd Elektrotechniczny

2011

R. 87, nr 9a

316-320

Energy saving is an important issue in mobile applications where portable energy resources are limited. This paper proposed a configuration consists of a coupled set of two brushless permanent magnet motors instead of conventional single motor configuration to increase the efficiency in a wide range of motor operation points. Proposed system includes two brushless DC permanent magnet motors with ratings equal to one third and two third of the original single motor rate. A proper control system is then designed for appropriate usage of these motors in different operation speeds. Simulation results demonstrate an efficiency improvement in a wide range of speed control.

W artykule zaproponowano dwa sprzężone bezszczotkowe silniki zamiast konwencjonalnego pojedynczego silnika dla zwiększenia efektywności układu napędowego w zastosowaniu do łodzi podwodnych.