Page 462 - Practical Design Ships and Floating Structures

Practical Design of Ships and Other Floating Structures 437
You-Sheng Wu, Wei-Cheng Cui and Guo-Jun Zhou (Eds)
0 2001 Elsevier Science Ltd. All rights reserved

VISCOUS FLOW CALCULATIONS USED FOR DREDGER DESIGN

M. Hoekstra I, A. de Jager and H.H. Valkhof

' MARIN, P.O. Box 28,6700 AA Wageningen, the Netherlands
IHC Holland NV Dredgers, P.O. Box 1,2960 AA Kinderdijk, the Netherlands

ABSTRACT

For a single screw Hopper Dredger, which meanwhile has been constructed and is operating
successfully now, as shown below, IHC HOLLAND NV DREDGERS (IHC) studied the viscous flow
and the related wake distribution with the aid of MARIN's viscous flow code PARNASSOS. Due to
the very short building time, demanded by the owner, the yard was forced to skip the usual model test
programme. Instead, computational fluid dynamics was chosen to verify the design and to make sure
that a reasonable inflow for the propeller was obtained, a necessary condition for the avoidance of
vibration problems. The study concerns the viscous flow calculations for a preliminary and modified
hull form at model and full scale Reynolds numbers, while for a few calculations the effect of the
propeller has been included.

. *1

KEYWORDS
Propeller, Computational fluid dynamics, Viscous flow, Wake distributions, Reynolds number