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A complete design of ship propellers using the new computer system

Hull of a Ship Moving in Calm Water with Constant Velocity, Mar. Tech. Transactions , Vol. 5, 1994 Koronowicz T.: The Computer Method for Prediction of the Velocity Field Behind a Full-scale Ship Hull, Polish Maritime Research Vol. 10, No. 1, 2003 Koronowicz T., Szantyr J. A., Chaja P.: A Computer System for the Complete Design of Ship Propellers , paper presented at the XVII International Conference on Hydrodynamics in Ship Design, Polanica Zdrój, Poland 19-21 September 2007 Koronowicz

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A complete design of ducted propellers using the new computer system

References Koronowicz T., Krzemianowski Z., Tuszkowska T., Szantyr J.A.: A Complete Design of Ship Propellers Using the New Computer System , Polish Maritime Research No. 1 Vol. 16 (2009) Koronowicz T.: The Algorithm of the Design Program Based on the Single Layer Lifting Surface for the Highly Skewed Propellers (in Polish), Report of the IFFM No. 296/86 Koronowicz T.: Design of Ducted Propellers of Technologically Simple Geometry (in Polish), Proc. 5 th Symposium of Ship

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A method for selection of parameters of ship propulsion system fitted with compromise screw propeller

References Bojko J.: Development of US Navy (in Polish). Bandera. February 2004 Kobyliński L.: Ship propellers (in Polish). Transport Publishing House (Wydawnictwa Komunikacyjne). Warszawa 1955 Carlton J.S.: Marine Propellers and Propulsion . Butterworth Heineman Basin A.M., Miniowicz I.J.: Teoria i rasczet grebnych wintow (in Russian). Leningrad 1963 Szantyr J.: Designing the controllable pitch propellers by means of

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A complete design of contra-rotating propellers using the new computer system

References Bjaerne E.: Systematic Studies of Contra-rotating Propellers for Merchant Ships , Transactions RINA 1973 Glover E. J.: Contra-rotating Propellers for High Speed Cargo Vessels , Transactions NECIES, February 1967 van Gunsteren L. A.: Application of Momentum Theory in Contra-rotating Propellers , International Shipbuilding Progress, No. 206, 1971 Koronowicz T., Krzemianowski Z., Tuszkowska T., Szantyr J. A.: A Complete Design of Ship Propellers

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A complete design of tandem co-rotating propellers using the new computer system

References Koronowicz T., Krzemianowski Z., Tuszkowska T., Szantyr J. A.: A complete design of ship propellers using the new computer system . Polish Maritime Research. No. 1/2009, vol. 16 Koronowicz T., Krzemianowski Z., Tuszkowska T., Szantyr J. A.: A complete design of ducted propellers using the new computer system . Polish Maritime Research. No. 2/2009, vol. 16 Koronowicz T.: Algorithm of the Design Program Based on the Single Layer Lifting Surface Model Applied to the

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Numerical Simulations Of Hydrodynamic Open-Water Characteristics Of A Ship Propeller

Abstract

The paper presents the results of numerical simulations of ship propeller operation bearing the name of Propeller Open Water (POW) Tests. The object of tests was a sample ship propeller (PPTC1), the geometrical and kinematic data of which are available, along with the results of model tests, on the official page of the research centre involved in the measurements. The research aimed at verifying the correctness of results of numerical simulations performed in the model and real scale. The results of numerical analyses performed in the model scale were confronted with those measured in the experiment. Then, making use of dimensionless coefficients which characterise propeller’s operation, the recorded model data were extrapolated to real conditions and compared with corresponding results of simulations. Both the numerical simulations and the experimental research were performed for the same propeller load states. The reported research is in line with other activities which aim at developing advanced numerical methods to support the process of ship propeller designing.

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Water-lubricated bearings of ship propeller shafts - problems, experimental tests and theoretical investigations

Water-lubricated bearings of ship propeller shafts - problems, experimental tests and theoretical investigations

In recent years can be met ships whose propeller shaft polymer bearings are lubricated with water. It results from simplicity and associated low cost of such solution which is also environmentally friendly as no risk of pollution is involved. However the solution is not free of disadvantages. The main problem is intensive wear of bush material, occurring in certain cases. It very often results from errors of improper design and machining and mounting operations. Another problem is a limited value of its hydrodynamic load-carrying capacity, resulting from low viscosity of water used as a lubricating medium.

As results from the performed research investigations, bearing of the kind is a highly sensitive unit. Problems of choosing a suitable bearing clearance, designing an optimum bush geometry, selecting a proper bush material are crucial for lifitime of the bearing.

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A Method to Assess Transverse Vibration Energy of Ship Propeller Shaft for Diagnostic Purposes

Abstract

The article discusses a key problem of ship propulsion system vibration diagnostics, which concerns assessing this part of mechanical energy transmitted from the main engine to the ship propeller which is dissipated due to propeller shaft vibration. A simplified calculation model is proposed which allows the total energy of the generated torsional vibration to be assessed from the shaft deflection amplitude measured at the mind-span point between the supports. To verify the developed model, pilot tests were performed on the laboratory rotational mechanical system test rig. In those tests, cyclic bending moment was applied to a unified (cylindrical) material sample, which modelled, at an appropriate scale, structural and functional properties of a real propeller shaft.

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Influence of main design parameters of ship propeller shaft water-lubricated bearings on their properties

Influence of main design parameters of ship propeller shaft water-lubricated bearings on their properties

In recent years more and more frequently can be met ships in which propeller shaft water-lubricated polymer bearings have been applied. It results from their simplicity and associated relatively low initial and operational cost as compared with the complex classical sealed system based on oil-lubricated bearings. It is worth mentioning that the water-lubricated bearings are also environmentally friendly as no risk of pollution with lubricating oil used in classical systems, is involved. Design procedure of bearings in question based on materials made available by producers is relatively simple. However it turns out that choice of an appropriate sliding material, clearance value and optimum arrangement of lubricating grooves may greatly influence bearing's properties. As results from the performed research investigations, bearing of the kind is a highly sensitive unit. Problems of choosing a suitable bearing clearance, designing an optimum bush geometry, selecting a proper bush material are crucial for life time of the bearing. In particular the problem is in forming hydrodynamical properties of bearing as owing to its operation in the fluid friction regime durability of bearings, the very responsible units of propulsion transmission system, can be greatly extended.

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Prediction of power demand for ship motion control system of sea mining ship fitted with tubular winning system

Prediction of power demand for ship motion control system of sea mining ship fitted with tubular winning system

One of the crucial systems of sea mining ship for poly-metallic concretions is its motion control system (SMC). Power of such system depends on sea environment characteristics and main dimensions of the ship. It can be expected that it will have important influence on total power of the ship's power plant and in effect on the mining ship's dimensions. In this paper is presented one of the possible ways of preliminary estimation of design power of SMC system for sea mining ship. Since details of design solution of such system for the ship in question are unknown (ships of the kind have not been built so far) the presented results should be considered to be the first estimation of the order of the power demand.

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