Experimental Study on the Burning Characteristics of Transformer Oil Pool Fires

Zhao, Jinlong; Wang, Shansheng; Zhang, Yaobi; Zhou, Rui; Yang, Rui

doi:10.1021/acs.energyfuels.0c00175

Cited by 38 publications

(12 citation statements)

References 40 publications

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“…To quantify the flame entrainment coefficient, Hu et al 29 established a generalized flame entrainment coefficient solution model, as follows: where Q̇ * is the dimensionless heat release rate, Δ T z is the temperature rise at height z (°C), Δ T f is the temperature rise at the flame tip (°C), α is the entrainment coefficient, Z is the vertical height above the orifice (m), h is the flame height (m), and D is the orifice diameter (m). where Q̇ * is the dimensionless heat release rate, Q̇ is the heat release rate (kW), the fuel effective heat of combustion is 40 MJ kg –1 , 45 ρ 0 is the ambient air density (kg/m 3 ), c 0 is the specific heat at constant pressure (kJ kg –1 K –1 ), T 0 is the ambient temperature (K), g is the gravitational acceleration (m/s 2 ), and D is the orifice diameter (m).…”

Section: Resultsmentioning

confidence: 99%

Experimental Investigation of the Combustion Behavior of Transformer Oil Jet Flame

Sun

Liu

et al. 2022

ACS Omega

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Transformer oil jet fire is one of the most dangerous types of fires in substations. The combustion behavior of transformer oil jet fire produces uncontrollable hazards to personnel and equipment and even triggers a domino effect. However, the jet fire combustion behavior of such materials as transformer oil has not been revealed before. Investigation of the combustion behavior of transformer oil jet fire has positive implications for the prevention and control of substation fires. In this paper, KI25X transformer oil was used as fuel. A series of transformer oil jet fire experiments were conducted with variable orifice diameters (5, 10, and 15 mm) with heat release rates ranging from 200 to 659.2 kW. The results showed that the entrainment coefficient of transformer oil jet fire was greater than that of pure gas phase jet fire. The entrainment coefficient of transformer oil jet fire was 0.029. Using dimensionless theory, it was proposed that the imaginary point source was proportional to the 0.317 power of Froude number. Based on the point source model, a dimensional analysis model with Reynolds number was developed. The radiation fraction of transformer oil jet fire was proportional to the −0.133 power of Reynolds number. This study played an important role in improving the jet combustion behavior of transformer oil.

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Section: Resultsmentioning

confidence: 99%

Experimental Investigation of the Combustion Behavior of Transformer Oil Jet Flame

Sun

Liu

et al. 2022

ACS Omega

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“…In addition, the mass burning rate (m') is written as

m^{'} = (c_{p} (T_{italicboil} - T_{\infty}) + L_{V}) = q_{f}

. With radiation‐controlled combustion (D > 0.2 m), the effects of heat conduction and heat convection can be disregarded 27 . The low‐pressure environment hardly affects radiative heat feedback from the flame to the fuel surface.…”

Section: Resultsmentioning

confidence: 99%

Experimental investigation on RP‐3 aviation kerosene large‐scale pool fires at high altitude

et al. 2022

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RP‐3 aviation kerosene is a standard fuel that is used in civil aircraft and is a substitute for Jet‐A fuel. This paper investigates the combustion behaviour of RP‐3 aviation kerosene in an open space in the low‐pressure environment of a plateau. A series of large‐scale pools with diameters ranging from 0.4 m to 2.82 m combustion experiments are performed. Typical combustion characteristic parameters, including combustion rate, flame height and axial plume temperature distribution is measured. Results show that a low‐pressure environment significantly affects pool fires. With combustion rate, there is a linear variation law between oil pool size and combustion rate. The experimental data are fitted as a means of obtaining the large‐scale combustion rate relationship equation at low pressure. Experimental flame height data is compared using classical prediction models. Prediction model coefficients at low pressure are determined. The axial plume temperature distribution is greater than in the literature findings due to flames becoming longer in a low‐pressure environment. The three regimes in McCaffery's model are redefined and correlate well with the vertical temperature profile of the pool centreline. The results of the experimental investigation will help research fire hazards in low‐pressure environments while also contributing to the provision of basic data for the development of firefighting operation strategies.

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“…Two video cameras at a speed of 25 frames per second were employed to record the flame behavior, based on which the flame length was calculated using a flame images processing method [17,18]. Videos of the flames were converted to a series of binary pictures and the probability of flame intermittency was then calculated.…”

Section: Methodsmentioning

confidence: 99%

Experiments and modeling of the temperature profile of turbulent diffusion flames with large ullage heights

Zhao

Zhang

Song

et al. 2023

Fuel

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Experimental Study on the Burning Characteristics of Transformer Oil Pool Fires

Cited by 38 publications

References 40 publications

Experimental Investigation of the Combustion Behavior of Transformer Oil Jet Flame

Experimental Investigation of the Combustion Behavior of Transformer Oil Jet Flame

Experimental investigation on RP‐3 aviation kerosene large‐scale pool fires at high altitude

Experiments and modeling of the temperature profile of turbulent diffusion flames with large ullage heights

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