Numerical Prediction of Propeller-Hull Interaction Characteristics Using RANS Method

Abstract

The paper presents the results of computational evaluation of the hull-propeller interaction coefficients, also referred to propulsive coefficients, based on the unsteady RANS flow model. To obtain the propulsive coefficients, the ship resistance, the open-water characteristics of the propeller, and the flow past the hull with working propeller were computed. For numerical evaluation of propeller open-water characteristics, the rotating reference frame approach was used, while for self-propulsion simulation, the rigid body motion method was applied. The rotating propeller was modelled with the sliding mesh technique. The dynamic sinkage and trim of the vessel were considered. The free surface effects were included by employing the volume of fluid method (VOF) for multi-phase flows. The self-propulsion point was obtained by performing two runs at constant speed with different revolutions. The well-known Japan Bulk Carrier (JBC) test cases were used to verify and validate the accuracy of the case studies. The solver used in the study was the commercial package Star-CCM+ from SIEMENS.

CFD Analysis on the Development of Pre-Duct Shape to Improve Propeller Performance

“…Studies on the CFD in numerical simulation of propellers, especially propellers of type MP.687 that has been performed. With the development of a numerical viscous flow theoretical approach based on Reynolds-Averaged Navier Stokes (RANS) equations, propeller performance can be determined with good results are taken from [35][36][37][38]. The CFD model using ANSYS CFX software package, modeling the flow around the propeller with RANS equation for three dimensional unsteady viscous incompressible flow.…”

Numerical Investigation of the Scale Effect on the Flow around the Ship by using RANSE Method

“…The type of boundary conditions is defined as follows: The velocity inlet is applied on inlet, top and bottom of virtual towing tank, the flow behind the hull is pressure outlet, the two sides of virtual towing tank are the symmetry plane. No-slip wall condition is used on the ship hull [32].…”

“…Presently, thank the considerable development of computational resources, and numerical method, RANSE method is broadly applied to solve the hydrodynamics problems in general [5][6][7] and ship hydrodynamic problems in particular [4,[7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. In comparison with the experiment, RANSE method provides relatively reliable results, saving computational time and expenditure as no physical model requires [8,10,24]. In addition, RANSE also advances in simulating the ship resistance at full scale.…”

Numerical Prediction of Ship's Self-Propulsion Parameter by Using CFD Method

“…Among various methods to evaluate the shipʹs selfpropulsion, the CFD method is the most commonly used due to its accuracy and computational time [1][2][3][4]. Therefore, this paper aims to evaluate the shipʹs selfpropulsion based on the CFD method.…”