Numerische Untersuchung des Eisbrechwiderstandes eines Schiffes bei kontinuierlicher Bewegung im ebenen Eis Schlussbericht

Available from TIB Hannover: RN 3770(256)+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman

Numerische Vorhersage des Eisbrechwiderstandes eines Schiffes im ebenen Eis Schlussbericht

The icebreaking resistance of a ship advancing in level ice was investigated. In the course of the investigations it has turned out that the icebreaking resistance is to a great extent a hydrodynamic phenomenon, which can be investigated with the methods of CFD, and inpart, specially at low speeds a problem of solid mechanics. Two numerical models are under development: (1) The icebreaking process at the design waterline; (2) the motion of the broken ice floes under the ship hull. In Part 1 the computed results show already good correlation with the experimental results. During the course of this research project the numerical algorithms of the program Part 1 were developed further. A better convergency and a faster numerical solution were reached. The numerical model in Part 2 is still in an intensive development phase. For purposes of validation model experiments were carried out with one ship model. We have been able to show that a numerical prediction of the ship resistance is a realistic goal. Significant or decisive steps in this direction, that is, in direction numerical ice tank, were taken. (orig.)SIGLEAvailable from TIB Hannover: RN 3770(275) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman

Aftbody development for icebreaking vessels with regard to propulsion, maneuvering and astern performance Final report

New aftbodies were developed for a twin screw icebreaker and a single screw icebreaking cargo vessel. The Russian icebreaker DIKSON and the ice-going multi-purpose cargo vessel of the SA-15 class were used as the basic hull forms. The task of this study was to improve the propulsion, the maneuvering capability and the astern icebreaking performance of these vessels. Models of the new aftbody designs were manufactured and examined together with the basic vessels under various ice conditions in the HSVA ice tank. (orig.)SIGLEAvailable from TIB Hannover: RN 3770(228)+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman

Numerische Vorhersage des Eisbrechwiderstandes eines Schiffes im ebenen Eis und Abschaetzung der Propeller-Eis-Wechselwirkung Schlussbericht

SIGLEAvailable from TIB Hannover: F01B570 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung und Forschung, Berlin (Germany)DEGerman

Numerische Vorhersage des Eisbrechwiderstandes eines Schiffes im ebenen Eis Schlussbericht

The icebreaking resistance of a ship advancing in level ice was investigated. In the course of the investigations it has turned out that the icebreaking resistance is to a great extent a hydrodynamic phenomenon, which can be investigated with the methods of CFD, and inpart, specially at low speeds a problem of solid mechanics. Two numerical models are under development: (1) The icebreaking process at the design waterline; (2) the motion of the broken ice floes under the ship hull. In Part 1 the computed results show already good correlation with the experimental results. During the course of this research project the numerical algorithms of the program Part 1 were developed further. A better convergency and a faster numerical solution were reached. The numerical model in Part 2 is still in an intensive development phase. For purposes of validation model experiments were carried out with one ship model. We have been able to show that a numerical prediction of the ship resistance is a realistic goal. Significant or decisive steps in this direction, that is, in direction numerical ice tank, were taken. (orig.)SIGLEAvailable from TIB Hannover: RN 3770(275) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman