An investigation of exhaust smoke dispersion for a generic frigate by numerical analysis and experiment

Dobrucali, Erinç; Ergin, Selma

doi:10.1177/1475090217742240

Cited by 4 publications

(5 citation statements)

References 21 publications

(35 reference statements)

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“…As can be seen from the literature review, there are many detailed numerical studies dealing with the exhaust smoke dispersion of ships, but only few experimental and analytical studies are available in the literature. This study develops further the analysis of the authors by flow visualization and analytical results on the exhaust gas dispersion from the generic frigate [18][19][20][21][22]. In the previous works of the author, the problem of the exhaust gas dispersion of frigate has been studied by using numerical techniques.…”

Section: Introductionmentioning

confidence: 94%

“…Park et al investigated the flow of the exhaust-gas from the ship's funnel, analytically [17]. In the studies of Ergin et al, Dobrucali and Ergin and Ergin and Dobrucali, the interaction of the exhaust smoke with the super-structure of a frigate is analysed [18][19][20][21][22]. The analysis was conducted for the exhaust gas with a variety of four yaw angles, velocities and the temperatures.…”

Section: Introductionmentioning

confidence: 99%

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Flow visualization and analytical study on the exhaust gas diffusion of a frigate

Dobrucali

2021

Pomorstvo (Online)

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Wind tunnel flow visualization tests were conducted to analyse the efflux velocity impacts and the yaw angle on the smoke dispersion of the exhaust for a generic frigate. An analytical study was also implemented to obtain the exhaust plume trajectories. The 1/100 scale generic frigate, having a platform for helicopters on the aft of the ship, was built and employed during the experimental study. The forward and astern cruises of the frigate were considered. It is found that the plume height and the exhaust gases momentum increase with the velocity ratio. The problem of smoke nuisance was observed for the ratios with low velocity such as K=0.2. The plume was also directed towards the helicopter platform when the yaw angles are higher than 10°. The experimental results are compared with the analytical solutions for three different velocity ratios. The compliance between the experimental and analytical results is found to be consistent.

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Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Flow visualization and analytical study on the exhaust gas diffusion of a frigate

Dobrucali

2021

Pomorstvo (Online)

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“…Pollutant emissions from ships traveling between different ports in the Marmara Sea, have been investigated by the ITU Ship Emission Laboratory for more than 15 years. [16][17][18][19][20][21][22][23] The research covers direct emission measurements aboard ships, emission control of ships, efficiency management, and emission inventory using AIS data. NOx, SO 2 , CO, CO 2 , HC, and PM were measured on board a ferry sailing at Marmara Sea between the Eskihisar and Topcular ferry using Ultra-Low Sulfur Diesel as fuel [23][24][25][26][27] (see Table 1).…”

Section: Experimental Campaign Carried Outmentioning

confidence: 99%

Possible approaches to the study of emissions from ships during their operations in ports

Ergin,

Mocerino,

Quaranta

2023

Proceedings of the Institution of Mechanical Engineers, Part M:

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The emissions from ships are the key factor influencing the air quality near large ports. Although ship emissions are difficult to quantify, doing so can help port management find logistical solutions that can reduce the impact of having a large number of giant ships in a limited space. The joint study between the University of Naples and Istanbul Technical University, which focuses on the investigation of ship emissions in ports, is presented in this paper. It is expected that this study will lead to create new techniques for calculating, measuring, and validating emissions from ships at ports.

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“…The different plume behaviors of the exhaust from different numbers of container ship stacks were quantitatively analyzed based on mass fraction via CFD simulation [14]. The effects of the efflux velocity, operational conditions, stack geometry, and buoyancy on the exhaust dispersion of generic frigates have been investigated numerically [15].…”

Section: Introductionmentioning

confidence: 99%

Dispersion Simulations of Exhaust Smoke Discharged from Anchor-Handling Tug Supply Vessel under Various Wind Conditions

Jeong

Ji²,

Jeong³

et al. 2023

Applied Sciences

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Exhaust smoke discharged from marine vessels and offshore plants not only contaminates the hull and cargo but is also the main cause of deterioration in the crew’s health and working environment. Rules and regulations have been implemented and have become stricter in recent decades. In this study, the exhaust smoke flow around an anchor-handling tug supply vessel in a stationary state, which has been seldom studied, is analyzed using computational fluid dynamics. The study investigates the effect of changing the wind speed and direction, which primarily affects the flow and dispersion of the smoke, to verify the suitability of the environment for the crew. To assess the environment, the recommended and comfortable concentrations of NO2 are used. The results demonstrate that a higher wind speed worsens the effect of the exhaust flow on the environment, owing to lower-pressure values and regions behind the structures. The emission of exhaust smoke is unsatisfactory when the wind flows from the side or rear of the vessel, instead of from the bow. Differing from previous studies conducted on general merchant vessels in navigating conditions, it was found that side winds can also have detrimental environmental effects in the stationary state. Adopting the original design of exhaust pipes leads to the distribution of exhaust smoke over the deck, exceeding the recommended exposure limit. Increasing the height of the pipes is identified as a simple but effective method to facilitate the smooth discharge of exhaust smoke.

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An investigation of exhaust smoke dispersion for a generic frigate by numerical analysis and experiment

Cited by 4 publications

References 21 publications

Flow visualization and analytical study on the exhaust gas diffusion of a frigate

Flow visualization and analytical study on the exhaust gas diffusion of a frigate

Possible approaches to the study of emissions from ships during their operations in ports

Dispersion Simulations of Exhaust Smoke Discharged from Anchor-Handling Tug Supply Vessel under Various Wind Conditions

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