Parametric study on ship’s exhaust-gas behavior using computational fluid dynamics

Sunho Park,Jiman Yang,Shin Hyung Rhee

doi:10.1080/19942060.2016.1260057

Abstract

ABSTRACTThe influence of design parameters related to a ship’s exhaust-gas behavior was investigated using computational fluid dynamics (CFD) for an 8,000 TEU container carrier. To verify the numerical methods, the results were studied by comparing with experimental results. Several test conditions, i.e. various load conditions of ship, wind angle, deckhouse breadth, radar mast height, and exhaust-pipe height and shape were considered for a ship’s exhaust gas flow around the 8,000 TEU container carrier. The influence of the design parameters on contamination by the exhaust gas was quantified, after which the principal parameters to avoid contamination were selected. Finally, the design guideline of yP/H = 2 was suggested to avoid the contamination from the ship’s exhaust gas using the CFD results, model tests, and sea trials.

Highlights

With container ships becoming larger and faster in recent years, ships up to 18,000 TEU in size have recently emerged
8,000 TEU to 10,000 TEU container ships, which are the main ships operated by shipping companies, have an integrated deckhouse and funnel
8,000 TEU to 10,000 TEU container ships cannot secure an appropriate height for the funnel exhaust pipe due to the restriction on the size of ship and air draft according to the port and harbor, making these ships vulnerable to damages related to the exhaust gas

Summary

Introduction

With container ships becoming larger and faster in recent years, ships up to 18,000 TEU in size have recently emerged. In mega-sized container ships over 13,000 TEU, a twin island configuration that allocates the deckhouse and the funnel separately is primarily used. In terms of exhaust gas disposal, the twin island type is better than an integrated type. 8,000 TEU to 10,000 TEU container ships, which are the main ships operated by shipping companies, have an integrated deckhouse and funnel. 8,000 TEU to 10,000 TEU container ships cannot secure an appropriate height for the funnel exhaust pipe due to the restriction on the size of ship and air draft according to the port and harbor, making these ships vulnerable to damages related to the exhaust gas. The exhaust gas causes negative effects on noise, vibration, and heat damage to INMASAT-C antenna by high temperature (Park, Heo, Yu, & Rhee, 2011). The crew’s health and the air quality deteriorate when it is brought into the deckhouse (Lirn, Lin, & Shang, 2014), and can cause economic losses due to contaminated cargo

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Conclusion