An experimental and non-dimensional study on the vertical temperature distribution of a sealed ship engine room fire

Wang, Jinhui; Jiao, Yu; Shi, Long; Xie, Qiangqiang; Li, Guoqiang; Chen, Weijiong; Zhang, Shaogang

doi:10.1016/j.oceaneng.2018.07.018

Cited by 31 publications

(8 citation statements)

References 33 publications

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“…Wu et al [10] researched mass burning rates and flue gas temperatures under mechanical vents by conducting large-scale experiments on a nacelle platform. Wang [11] observed through experimental studies that the temperature rise distribution of closed ship cabin fires is different from that of open fires, and the experimental results showed that the vertical temperature gradient is smaller. Simultaneously, due to the relatively poor ventilation conditions in a ship's engine room, the oxygen consumption of multiple power machines usually leads to a low oxygen content.…”

Section: Literature Reviewmentioning

confidence: 99%

A Numerical Study on the Smoke Dispersion and Temperature Distribution of a Ship Engine Room Fire Based on OpenFOAM

Zhao,

Miao

et al. 2023

Sustainability

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To further study the smoke dispersion and the temperature distribution in ship engine room fires, the fire dynamics solver buoyantReactingFOAM in the software OpenFOAM-10 is used to conduct a numerical simulation study on a pool fire caused by fuel oil leakage in a ship engine room. The applicability of this solver in simulating ship-engine-room-scale fires is validated by comparing it with experimental data. The impact of the mechanical ventilation, fire area, and fire position on the smoke dispersion and the temperature distribution in the ship engine room during the fire are considered in the simulation study, with a focus on the control room and the escape exit. The simulation results of buoyantReactingFOAM agree well with the experimental data. The simulated results of the case study show that for both in the control room and near the escape exit, among the factors of fire position, fire area, and the ventilation situation, the fire position affects the temperature distribution and the smoke dispersion most heavily, followed by the fire area and then the ventilation situation, which has the least influence on them. But, compared to the control room, the influence degree of the ventilation air velocity in the escape exit is larger than that in the control room. With an increase in the fire area, the spread rate of high temperature and high smoke concentration increases. With an increase in the ventilation air velocity, the aggregation degree of smoke and temperature decreases, but its decreasing range is very small when the ventilation air velocity is larger than 2 m/s.

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Section: Literature Reviewmentioning

confidence: 99%

A Numerical Study on the Smoke Dispersion and Temperature Distribution of a Ship Engine Room Fire Based on OpenFOAM

Zhao,

Miao

et al. 2023

Sustainability

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“…For an open fire, x is assumed to be a constant while for an enclosure fire, x is expected to be larger in the beginning but decreases after oxygen becomes limited. Wang et al (2018) suggest that in a sealed compartment, the average combustion efficiency of heptane during the whole combustion process is about 0.75. For a fuel-controlled heptane pool fire, the combustion efficiency is a constant at about 0.92, according to the work in Yao et al (2021).…”

Section: Heat Release Ratementioning

confidence: 99%

Effect of opening geometries on fire development in a ro-ro space

Lei

Olofsson

Ingason

et al. 2022

Ships and Offshore Structures

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A series of model scale experiments were conducted to study the fire development in a ro-ro deck with various opening geometries. The experiments were performed in a 1/8 reduced scale model with a heptane pool fire as fire source. Experimental results show that both the ventilation factor and the opening position affect the fire development. The critical opening ratio for the fire to self-extinguish is 4%, with the opening locating at the bottom of the side walls while no self-extinction is found for other tests. A higher opening position and a larger opening height provide better flow exchange between the deck and the ambient, but this effect is only obvious for 4% opening. Numerical study shows that Fire Dynamic Simulator used with default simple settings underestimates the fire development and yields an early extinction when fire self-extinction occurs. For freely developed fire with large openings, FDS gives more close results to experiments.

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“…Indeed, a fire in a ship engine room is different from a regular cabin fire, and the former's suppression is key to the safety structure of a ship. Wang et al [10] carried out a series of experimental tests in a scaled ship engine room and found that the temperature gradient of a ship engine room fire increased with fire size. In the case of a fire accident on the ship Le Boreal [11], it was significant that the ship fire had neither a root cause nor a simple cause concerning the unsafe actions of engineers or even management.…”

Section: Introductionmentioning

confidence: 99%

Effect of Lateral Airflow on Initial HSI and Flame Behavior of Marine Fuel in a Ship Engine Room: Experiment and Analysis

Wang,

Ming,

Liu

et al. 2023

JMSE

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The flame behavior of engine fires, such as those caused by leaked fuel coming into contact with an ignition source, is significant in practical applications, where flame detection is used to minimize the damage of the attendant ship fire safety problem. In this work, the flame behavior of hot-surface ignition (HSI) under crossflow was studied, with a particular focus on the difference in lateral airflow velocities for HSI-driven flame deviations at the windward and leeward sides of a ship engine room; a problem such as this has not previously been quantified. Full-scale experiments were conducted in a ship engine room using marine diesel and hydraulic oil as the fuel, and by adopting lateral airflow with the velocities of 0 m/s, 1.0 m/s, 3.0 m/s, and 5.0 m/s, together with an HSI mechanism consisting of marine diesel and hydraulic oil coming into contact with elevated hot-surface temperatures. The results show that the effects of disturbing the combustible gaseous mixture for marine fuel HSI, at both the windward and leeward sides, strengthened as the airflow velocity increased. The HSI position of the leaked marine fuel in the engine room was strongly dependent on ventilation, while that under the airflow condition decreased with the increase in the hot-surface temperature. A model was proposed to characterize this difference on the basis of the HSI height, which was defined as the ratio of the height during the initial HSI to the stationary period. The results indicate that the scale of the flame gradually increased in the horizontal direction, which was significantly different from the result in the scenario without mechanical ventilation. The results also revealed that the fluctuation of hydraulic oil through the temperature field was significant and lasted for a long time under a low HSI temperature.

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An experimental and non-dimensional study on the vertical temperature distribution of a sealed ship engine room fire

Cited by 31 publications

References 33 publications

A Numerical Study on the Smoke Dispersion and Temperature Distribution of a Ship Engine Room Fire Based on OpenFOAM

A Numerical Study on the Smoke Dispersion and Temperature Distribution of a Ship Engine Room Fire Based on OpenFOAM

Effect of opening geometries on fire development in a ro-ro space

Effect of Lateral Airflow on Initial HSI and Flame Behavior of Marine Fuel in a Ship Engine Room: Experiment and Analysis

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