Jan Kulczyk

Analysis of screw propeller 4119 using the Fluent system

The aim of this paper was to carry out an analysis of screw propeller 4119 using the RANS method. A computer program for creating spatial propeller geometry was developed for this purpose. Two-equation turbulence models: k-ɛ and k-ω were adopted for calculations. The calculations were performed for an isolated propeller. The results were used to determine the propellers hydrodynamic characteristics. The calculation results were compared with experimental results.

Analysis of hull resistance of pushed barges in shallow water

Analysis of hull resistance of pushed barges in shallow water These authors performed a set of numerical calculations of water flow around pushed barges differing to each other by bow forms. The calculations were executed by means of FLUENT computer software. Turbulent free-surface flow of viscous liquid was considered. In this paper the calculated values of barge hull resistance split into bow, cylindrical and stern part components, have been compared and presented.

Coefficients of Propeller-hull Interaction in Propulsion System of Inland Waterway Vessels with Stern Tunnels

Propeller-hull interaction coefficients - the wake fraction and the thrust deduction factor - play significant role in design of propulsion system of a ship. In the case of inland waterway vessels the reliable method of predicting these coefficients in early design stage is missing. Based on the outcomes from model tests and from numerical computations the present authors show that it is difficult to determine uniquely the trends in change of wake fraction and thrust deduction factor resulting from the changes of hull form or operating conditions. Nowadays the resistance and propulsion model tests of inland waterway vessels are carried out rarely because of relatively high costs. On the other hand, the degree of development of computational methods enables’ to estimate the reliable values of interaction coefficients. The computations referred to in the present paper were carried out using the authors’ own software HPSDKS and the commercial software Ansys Fluent.

Logistic Conditions of Container Transportation on the Oder Waterway

The paper contains the analysis of the possibility of container transportation on the Oder Waterway (the Gliwice Canal, the canalized stretch of the Oder River, and the regulated stretch of the Oder River), on the assumption that the waterway complies with conditions of class III European waterway. The analysis is based on the concept of modern motor cargo vessel, adjusted to hydraulic parameters of waterway. The vessel is designed for ballasting when passing under bridges. The amount of ballast water that enables transportation of two tiers of containers is given. The costs of waterborne transportation are compared to the costs of rail transportation of containers on selected shipping routes. http://www.transnav.eu the International Journal on Marine Navigation and Safety of Sea Transportation Volume 12

Methods of Determination of Frictional Resistance for Prediction of Total Resistance of Inland Waterway Vessels

Abstract In the present paper presented are the results of prediction of total resistance of inland waterway vessels based on model test data. In scaling the resistance from model to full scale the extrapolation with two-dimensional frictional resistance formulation (without form factor) was applied, combined with different methods of determination of frictional (viscous) resistance coefficient. There were used the equations that include the effect of water depth, with and without account for pressure gradient. It was shown that limited depth of water substantially affects the frictional resistance. The results of example calculations are compared to resistance prediction made using the ITTC 1957 model-ship correlation line. Example calculations take into account the limited depth of water. Depending on the applied method of determination of frictional resistance coefficient the resultant total resistance of inland waterway vessel is higher or lower than the resistance based on the ITTC 1957 correlation line. The effect of water depth depends on the ratio of water depth to ship draught (h/T), on ship speed, and on the composition of a convoy. The extrapolation of resistance was made without including the form factor. Computations are made based on model test data for an inland waterway cargo vessel, for a kombi-type convoy of an inland waterway cargo vessel and a dumb barge, and for a convoy of two dumb barges without a pushboat.

Heeling Moment Acting on a River Cruiser in Manoeuvring Motion

Abstract By using fully theoretical method the heeling moment due to centrifugal forces has been determined for a small river cruiser in turning manoeuvre. The authors applied CFD software for determination of hull hydrodynamic forces, and open water characteristics of ducted propeller for estimation of thrust of rudder-propellers. Numerical integration of equations of 3DOF motion was used for prediction of ship trajectory and time histories of velocities, forces and heeling moment.

Hydrodynamic conditions and traffic volume against reliability of inland waterway transport

Analysis of the impact of navigation conditions and traffic intensity on the reliability of inland waterborne transportation on the Oder River is presented in this paper. It was shown that present hydrologic conditions in this waterway do not allow to meet basic standards that every transportation system must comply with. Fundamental reasons are the low water depth and ice cover on the route. Ship failures and accidents have minor influence on reliability. The number of accidents on the Oder River depends on traffic intensity and amount of ships. The number of accidents is influenced by conditions of navigation. Such relationship is not observed on the German waterways. There the inattention of crew and excessive ship speed are the fundamental reasons of accidents.