Fire plume characteristics of annular pool fire with different cylindrical obstacles in a ship engine room

Zhang, Shaogang; Fang, Wei; Shi, Long; Liu, Jianghong; Wang, Jinhui; Cong, Beihua

doi:10.1016/j.oceaneng.2023.114253

Cited by 7 publications

(4 citation statements)

References 20 publications

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“…Wang [31] simulated a fire in the cabin of a ship through FDS, extracted the time-varying temperature field information, used it as an input variable into the ANSYS structural mechanical behavior simulator to carry out the thermo-mechanical coupling calculations, and probed into the mechanical response characteristics of the cabin structure under different fire locations; the results showed that the structural stress distribution was not uniform under the different fire locations, and the maximum temperature stress was 76 MPa at the height of the fire source of 2 m. Cylindrical obstacles such as weighing columns can lead to collapse and fire spread after burning. Numerical analyses allow us to obtain the temperature changes in different materials during combustion and to understand their effects on the outside world [32][33][34][35]. The importance of avoiding potential human injury and property damage from cabin fires is significant, and it follows that the realization of unmanned improvements to the intricate duct wiring in the nacelle [36] and an optimized engine structure [37][38][39] can also minimize the risk of human casualties.…”

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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“…It has been found that the height of the smoke layer in a ship engine room fire gradually increases with the gradual increase in the volume of mechanically supplied air [15]. When the flame spreads through the obstacles in a ship engine room fire, it merges above the obstacles [16]. This shows the competition between the flame height enhancement effect and the weakening impact.…”

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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“…3D numerical models can be used to simulate the ignition of evaporated marine fuel above a heated surface [24,25], revealing various combustion features. Relevant studies found that increased ventilation velocity results in elevated burn rates and temperature decreases at the tops of ship engine rooms while triggering a decrease in temperature [26][27][28]. Additionally, obstacles in fuel pools primarily affect the air entrainment of fire plumes, resulting in flame oscillation behaviors [29,30].…”

Section: Introductionmentioning

confidence: 99%

Influence of Edge-Limited Hot Surfaces on Accidental Ignition and Combustion in Ship Engine Rooms: A Case Study of Marine Diesel Leakage

Liu,

Wang,

et al. 2024

JMSE

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To extend initial ignition-related fire prevention in ship engine room, this work presents a case study of marine diesel leakage for identifying accidental ignition by hot surface. Based on a self-designed experimental platform, a full-scale innovative experimental arrangement was conducted for diesel leakage-related hot surface ignition (HSI) tests in a ship engine room. A series of parameters (e.g., heat transfer, evaporation mode, ignition position, ignition delay time, flame instability, and combustion behavior) for improving the initial HSI of diesel leakage on an edge-limited hot surface were analyzed. A transient sequence corresponding to a change in leakage flow rates ranging from 7.5 mL to 25 mL was tested, and hot surface temperatures (HSTs) were adjusted between 390 °C to 525 °C. Puffing motion accelerated the mixing of HSI-driven vapors with fresh air, which was affected by the edge-based limitation and HSTs. The case study identified the effects of hot surface shape and the most important combinations of HSI-driven combustion characteristics for estimating initial ignition responses. Based on this current work, prediction models were proposed for determining the HSI height of marine diesel for varying leakage flow rates and HSTs. The results indicate that HSI height increases with leakage flow rate and HSI position is influenced by edged hot surfaces, leading the vertical centerline to shift towards the side of the edge structure. The results also revealed that the ignition delay time of diesel leaked onto an edged hot surface decreases as leakage flow rate increases. This change causes the initial HSI to occur earlier, potentially creating an extra risk in ship engine rooms.

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Fire plume characteristics of annular pool fire with different cylindrical obstacles in a ship engine room

Cited by 7 publications

References 20 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 Lateral Airflow on Initial HSI and Flame Behavior of Marine Fuel in a Ship Engine Room: Experiment and Analysis

Influence of Edge-Limited Hot Surfaces on Accidental Ignition and Combustion in Ship Engine Rooms: A Case Study of Marine Diesel Leakage

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