Author(s)

J. Kulczyk

Abstract

The author presents a computational model of propeller operating in the wake of inland navigation flat-bottomed vessel. Using this model it is possible to compute propeller performance as well as propeller-hull interaction coefficients (wake fraction and thrust deduction factor) with limited depth of waterway taken into account. The surface distribution technique was applied to solve a flow over nozzle (part of ducted propeller) and potential component of flow between hull and waterway bottom. Vortex lattice model was used for screw propeller or impeller. Simplified Reynolds equation is being solved to determine axial velocity in flow domain. Results of performed calculations exhibit good agreement with available results of model tests. 1 Introduction Screw propeller located at the stern of a hull operates in non-uniform velocity

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