Page 484 - Practical Design Ships and Floating Structures

Practical Design of Ships and Other Floating Structures 459
You-Sheng Wu, Wei-Cheng Cui and Guo-Jun Zhou (Eds)
8 2001 Elsevier Science Ltd. All rights reserved

A CFD-BASED PARAMETRIC STUDY ON THE SMOKE BEHAVIOR
OF A TYPICAL MERCHANT SHIP

Eunseok Jin, Jaedon Yoon and Yongsoo Kim

Daewoo Shipbuilding & Marine Engineering Co., Ltd.,
1-Aju-Dong, Koje-City, Kyungnam, 656-714 Republic of Korea

ABSTRACT

In this paper, a CFD based parametric study is introduced, which is intended to investigate the smoke
behavior depending on the funnel and accommodation arrangement. Corresponding calculation results
were analyzed systematically and a simple measure was obtained, which hopefully could be applied to
the preliminary design of funnel and accommodation arrangement. In modeling the geometry, elements
having minor effects on the flow field were excluded and its reasonableness was proved by some pre-
calculations. But, the remaining elements that have considerable effects were modeled and the analyses
were performed in pretty realistic conditions. Properties that have significant effects on the behavior
were chosen as parameters to be investigated. Each parameter was varied in a given range.
Calculations were performed for all models resulting from the parameter variations. Analyzing all the
calculation results, influences of the parameters on the smoke behavior and a simple measure to predict
the smoke exhaust performance was obtained.

KEYWORDS

CFD, Parametric study, Smoke behavior, Funnel height, Deckhouse height, Funnel position, NO2 iso-
surface. Particle track

1 INTRODUCTION
For last several years DSME (Daewoo Shipbuilding and Marine Eng. Co., Ltd.) has practiced
numerous model tests and CFD analyses concerning the smoke exhaust performance of the funnel.
Through these experiences, now DSME has a good knowledge of a flow around the funnel and
especially, its ability of CFD analysis is on a fairly high level. But there is no standard to use properly
in the funnel design, By the way, recently, owner’s requirements for the model test or CFD analysis to
guarantee the smoke exhaust performance are increasing and thus the related costs are increasing.
Therefore, a proper method to estimate the smoke exhaust performance is highly required.
The behavior of the smoke exhausted from ship funnel is important in relation to the onboard hazard
such as pollution, high temperature, machinery malfunction and so on. And it strongly depends on the
funnel and accommodation arrangement. Therefore, it is required to estimate the smoke exhaust