Pool fire burning characteristics and risks under wind-free conditions: State-of-the-art

Guo, Youwei; Xiao, Guoqing; Wang, Lingyuan; Chen, Chao; Deng, Hongbo; Mi, Hongfu; Tu, Chu; Li, Yuanyuan

doi:10.1016/j.firesaf.2023.103755

Cited by 16 publications

(4 citation statements)

References 128 publications

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“…In [9] there is an overview of studies on the combustion of petroleum products in basins. Flame pulsations, specific mass burning rate, flame height, heat transfer by radiation are considered.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Construction of the stochastic model of thermal radiation from a flammable liquid spill fire

Oliinyk

2023

EEJET

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The object of this study is the process of liquid combustion in the pool, and the subject of the study is the characteristics of the random process that describes the heat flow by radiation. Such, in particular, are the law of distribution, mathematical expectation, and correlation function. An experimental study of the combustion of used motor oil in a pool measuring 9.5×8.7 m2 was carried out. The mathematical expectation and variance of the cross-sectional area of the flame were determined by video recording followed by the analysis of individual frames. Testing of the hypothesis about the normal law of distribution of the cross-sectional area showed that with a confidence probability of 0.95, the proposed hypothesis does not contradict the experimental data. A selective correlation function and its approximation in the form of σ2exp(–α|τ|) were constructed. Due to the linear relationship between the cross-sectional area and the heat flux by radiation from the fire, the latter will also have a normal distribution law. At the same time, the magnitude of pulsations (the ratio of the rms deviation to the mathematical expectation) for these random processes will be the same. The value of the parameter α of the correlation function will also be the same. Taking into account the inertial properties of the device for measuring the heat flux density, a comparison of the experimentally measured values of the heat flux density with the calculated ones was carried out. The measurement results fall into the intervals corresponding to the confidence probability of 0.95. At the same time, the maximum deviation between calculated and experimental data is 14 %. From a practical point of view, the built stochastic model opens up possibilities for taking into account random flame pulsations when determining safe zones for the location of personnel and equipment. The model can be used to specify the thermal effect of fire on steel and concrete structures

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Construction of the stochastic model of thermal radiation from a flammable liquid spill fire

Oliinyk

2023

EEJET

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“…Але горіння рідини в розливі довільної форми залишається не дослідженим. В [12] наведено огляд досліджень стосовно горіння нафтопродуктів в басейнах. Розглянуто пульсації полум'я, питому масову швидкість вигорання, висоту полум'я, теплопередачу випромінюванням.…”

Section: аналіз літературних даних і постановка проблемиunclassified

“…Параметричний опис поверхні полум'я над розливом рідини в умовах вітру дається формулою (11), що після підстановки в них (10) дає опис поверхні полум'я у вигляді (12). Використання опису поверхні полум'я в параметричній формі дозволяє визначити значення нормального вектору до поверхні -формули ( 13), (14).…”

Section: обговорення результатів моделювання випромінюючої поверхні п...unclassified

Developing a model of the radiating surface of a flame over a flammable liquid spill in the presence of wind

Oliinik,

Basmanov

2023

PES

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The object of the study is a spill fire. The subject of the study is the geometric characteristics of the flame, in particular, the length and angle of inclination. The model of the radiating surface of a flame over a burning liquid spill of an arbitrary shape is constructed. The essence of the approach is that the length of the flame at a given point is equal to the length of the flame at the point of the circular spill located at the same distance from the boundary of the spill. It allows generalizing the known empirical dependences for the case of spills of arbitrary shape. The flame length is a power-law function of the distance to the spill boundary and the mass loss rate per unit area. To take into account the effect of wind on the shape of the flame, the empirical dependence of the length and angle of inclination of the flame on the wind speed is used. It is assumed that the wind deforms the flame in such a way that all points of the flame surface deviate by the same angle from the vertical. Wind inclines the flame from the vertical axis more significantly for the smaller size of the spill and smaller mass loss rate per unit area. This is due to the formation of more powerful upward currents over the combustion center when its size and intensity of liquid combustion increase. A model of the radiating surface of the flame was constructed in a parametric form. The results obtained from the model are in good agreement with the experimental ones. The relative error for the angle of deviation of the flame by the wind from the vertical axis does not exceed 9%. In practice, this opens up opportunities for calculating the thermal impact on nearby technological objects, as well as determining safe zones for the location of personnel and equipment involved in fire suppression. The model can be used to specify the thermal effect of fire on steel and concrete structures.

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“…While many of the mechanical and physical properties of CMF have been well studied and reported, its thermal properties are yet to be understood. It is notable that although labscale experimental tests are more manageable, large-scale experimental studies, particularly those that need to be carried out at high temperatures (such as torch fire and jet fire tests), are cost-intensive and require numerical simulations to predict material performance [3][4][5]. Some important thermal properties needed for developing a finite element model (FE) of material under extreme heat are their thermal conductivity, specific heat capacity, surface emissivity and coefficient of thermal expansion.…”

Section: Introductionmentioning

confidence: 99%

Thermal Emissivity and Heat Capacity of Composite Metal Foam

Amoafo-Yeboah,

Rabiei

2024

J. Compos. Sci.

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Composite metal foam (CMF) is a new class of material based on a mixture of metal matrix composites and metal foams. While the mechanical properties of CMF are well studied, its thermal properties, particularly at extreme temperatures, are yet to be evaluated and established. This study investigates the specific heat capacity of stainless-steel composite metal foam at temperatures up to 1200 °C while comparing data obtained using the laser flash method and a differential scanning calorimetry method (DSC). Moreover, it outlines a detailed procedure for investigating the surface emissivity of composite metal foam (CMF) as a function of the emissivity of separate components (spheres and matrix). It uses experimental and analytical procedures to show how emissivity is directly affected by surface roughness, temperature, sphere curvature and viewing angles. The CMF used in this study consists of 316L stainless steel matrix and stainless-steel hollow spheres with varying sphere sizes.

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Pool fire burning characteristics and risks under wind-free conditions: State-of-the-art

Cited by 16 publications

References 128 publications

Construction of the stochastic model of thermal radiation from a flammable liquid spill fire

Construction of the stochastic model of thermal radiation from a flammable liquid spill fire

Developing a model of the radiating surface of a flame over a flammable liquid spill in the presence of wind

Thermal Emissivity and Heat Capacity of Composite Metal Foam

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