Applications of the modern CFD analysis methods to numeric propulsion simulation ships are presented. A RANSE-Solver for the computation of the viscous flow, a EULER-Solver for the determination of the propeller induced velocity and a potential Quasi Continuous Method for the propeller calculation were used in this project. The propeller body forces are assigned to the computation cells which are situated within the swept volume developed from rotating the propeller blades. With the EULER Solver we compute the velocity fields without and with the propeller effect in a quasi ideal fluid. The difference of these two calculations is the propeller induced velocity. The effective inflow is defined as the difference between the total flow velocity, which is one of the results of the RANSE solution in which the propeller effect is accounted for, and the propeller induced velocity. Following an iterative procedure the interaction between the hull, rudder and the propeller is simulated. Applications of the methods to numeric propulsion simulation for ships have shown promising results, which are in good agreement with the measurements. Comparisons of detailed results were made. For a slender model of Series 60 (C(B) = 0,60) the agreement between calculation and measurement with regard to the pressure as well as the velocity distributions is very good. For a tanker model (C(B) = 0,824) the flow separation, which was found out during the measurements without as well as with propeller, is well predicted, and the agreement between the calculated and the measured velocity distributions is satisfactory.


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    Title :

    Vereinfachte Methode zur Leistungsprognose unter genauer Erfassung der Wechselwirkung zwischen Schiffsrumpf, Ruder und Propeller


    Contributors:
    Chao, K.Y. (author)


    Publication date :

    2000


    Size :

    59 Seiten, 49 Bilder, 17 Quellen


    Type of media :

    Report


    Type of material :

    Print


    Language :

    German