Sage Journals: Discover world-class research

Abstract

This work simulates propeller-hull interaction effects by a novel method namely, coupling a Vortex Lattice Method (VLM) with a RANSE solver. The VLM generates the propeller forces based on the inputs of blade geometry, wake at propeller inlet, the required thrust and the propeller revolutions. The propeller forces thus obtained are distributed in the fluid domain at the propeller disk region at specific cells. These cells lie close to the blade coordinates and the forces are assigned to the centroids of cells by means of a user-defined function (UDF). The introduction of the body forces into the fluid domain, emulates the propeller action in the field of flow with consequent influences on the flow kinematics. Therefore the interaction effect between propeller and ship hull is simulated successfully by coupling the two methods. Thereby the kinematical aspects such as effective wake conditions are obtained. The results based on the methodology have been verified by comparison with data from the KCS ship available in recent published literature. The method establishes a successful numerical tank approach in understanding the ship hull-propeller interaction problem.

Keywords

Vortex Lattice Method RANSE solver User Defined Function (UDF)Propeller-hull interaction

References

Simonsen

C. D.

and Stern

(2005), RANS “Maneuvering Simulation of Esso Osaka with Rudder and a Body-Force Propeller”. Journal Ship Research, Vol. 49, No. 2, pp. 98–120.

Tahara

Wilson

, and Carrica

2005. “Comparison of free-surface capturing and tracking approaches to modern container ship and prognosis for extension to self-propulsion simulator”, Proc CFD workshop Tokyo 2005, 548–555.

Karl

Chao and Carrica

(2005). “Numeric propulsion for the KCS container ship, Proc CFD workshop Tokyo (2005), 483–489.

FLUENT 6.2 User's Guide (2006), Copyright Fluent Incorporate.

Kerwin

J. E.

(1984). “A vortex lattice method for propeller blade design”, MIT PBD-10 users manual, Massachusetts institute of technology.

Olsen

(2001). “Optimization of propellers using Vortex lattice method”, PhD thesis, Denmark technical university.

Kerwin

J. E.

Lee

C.S.

(1978). “Prediction of steady and unsteady marine propeller performance by numerical lifting surface theory” SNAME Transactions, Vol.86, 1978, pp. 218–253.

Dhinesh

Murali

Suramanian

V.A.

, (2009) “Estimation of hull-propeller performance by numerical lifting surface model hull using RANSE solver” Ships and Offshore Structures, Vol. 2(2), 1–15.

Hino

(2005) Preprints of CFD Workshop Tokyo 2005, National Maritime Research Institute, Tokyo, Japan.

Simulation of Propeller – Hull Interaction Using Ranse Solver

Abstract

Keywords

References