Propane-air mixture deflagration hazard with different ignition positions and restraints in large-scale venting chamber

Chen, Guoxin; Ling, Xiaodong; Zheng, Yi; Gu, Meng; Wang, Haozhe; Yu, Anfeng

doi:10.1016/j.jlp.2021.104520

Cited by 7 publications

(5 citation statements)

References 20 publications

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“…In this research, the computational fluid dynamics tool flame acceleration simulator (FLACS) version 10.3 was employed to solve the equation. 31 FLACS is the Renault Navier−Stokes three-dimensional solver generally recognized in the industry, which is broadly utilized in the numerical simulation of flammable gas and dust explosion. FLACS solves the Favre-averaged conservation equations for mass, momentum, enthalpy, turbulent kinetic energy, dissipation rate of turbulent kinetic energy, mass fraction of fuel, and mixturefraction applying a finite volume method on a threedimensional structured Cartesian grid.…”

Section: Calculation and Analysis Methodsmentioning

confidence: 99%

“…In this study, the Navier–Stokes equation is used to describe the gas-phase control equation, the gas-phase flow field is solved by a simple solver, the standard k –ε model is utilized to describe the turbulent flow, and a simplified one-step reaction model is used to explain the explosion method of the combustible gas/air mixture. In this research, the computational fluid dynamics tool flame acceleration simulator (FLACS) version 10.3 was employed to solve the equation . FLACS is the Renault Navier–Stokes three-dimensional solver generally recognized in the industry, which is broadly utilized in the numerical simulation of flammable gas and dust explosion.…”

Section: Calculation and Analysis Methodsmentioning

confidence: 99%

“…In recent years, many scholars have studied the combustion and explosion properties associated with LPG. , In general, the explosion features of combustible gases are affected by various factors, like initial temperature and pressure, ,, ignition energy, , obstacles, ,− and gas composition. − Using LPG–air and propane–air mixtures, Huzayyin et al . estimated the laminar combustion rate and explosion index.…”

Section: Introductionmentioning

confidence: 99%

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Risk Assessment of Liquefied Petroleum Gas Explosion in a Limited Space

Wang

Luo

et al. 2021

ACS Omega

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In recent years, the explosion accidents of liquefied petroleum gas (LPG) have induced tremendous losses. To analyze the deflagration danger of LPG, the explosion pressure and flame propagation features of the premixed LPG−air mixture in a closed pipeline at increased initial pressures and temperatures were examined by the numerical method. It has been shown that with an increase in the initial temperature, the highest explosion pressure and explosion induction period decrease, while the maximum flame temperature increases. As the initial temperature rises, the formation of the tulip flame accelerates, and the depression of the flame front increases at the same time. The elevated initial pressure raises the highest explosion pressure and the maximum flame temperature. Nevertheless, when the initial pressure exceeds 0.5 MPa, its impact on the flame temperature slowly diminishes. In addition, the gray relational analysis approach was utilized to evaluate the correlation between the initial condition and the derived parameters. The findings indicate that the initial pressure exerts the largest influence on the four explosion parameters. The research finding is important for exposing the deflagration risk features of LPG under complicated working situations, evaluating the explosion risk of correlated procedures and devices, and formulating scientific and effective explosion-proof measures.

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Section: Calculation and Analysis Methodsmentioning

confidence: 99%

Section: Calculation and Analysis Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Risk Assessment of Liquefied Petroleum Gas Explosion in a Limited Space

Wang

Luo

et al. 2021

ACS Omega

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“…The CFD software FLACS-CFD was employed in this study. Referring to previous studies, 33 the computational domain consisted of 10 cm cube grids, with a total of about 1.57 million cells. The PLANE-WAVE condition, ignoring the reflection of pressure wave, was adopted in the ventilation direction, and the default Euler condition was applied in other directions.…”

Section: Numerical Simulationmentioning

confidence: 99%

Experimental and Numerical Study on Deflagration Characteristics of Large-Scale Propane–Air Mixture

Chen

Wang

et al. 2023

ACS Omega

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Seven deflagration tests of a propane−air mixture were carried out in a 22.5 m 3 large-scale chamber. The effects of initial volume, gas concentration, and initial turbulence intensity on deflagration characteristics were analyzed. The main frequency of the explosion wave was quantitatively determined by the combination of the wavelet transform and energy spectrum analysis. The results show that the explosive overpressure is formed by the discharge of combustion products and secondary combustion, and the effects of turbulence and gas concentration on the explosive overpressure are higher than the initial volume. Under the condition of weak initial turbulence, the main frequency of gas explosion wave is between 32.13 and 48.33 Hz. Under strong initial turbulence conditions, the main frequency of the gas explosion wave increases with the increase of overpressure, and the empirical formula of the relationship between the main frequency and overpressure is summarized, which could provide theoretical support for the design of mechanical metamaterials for oil and gas explosion. Finally, the flame acceleration simulator numerical model was calibrated through tests, and the overpressure simulation values were in good agreement with the experimental data. The leakage, diffusion, and explosion of a liquefied hydrocarbon loading station in a petrochemical enterprise were simulated. The lethal distance and explosion overpressure at key buildings are predicted for different wind speed conditions. The simulation results can provide a technical basis for evaluating personnel injury and building damage.

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“…Vapor cloud explosions have become one of the most serious explosion hazards in chemical processes.At present, most of the studies on the propagation of combustible gas explosions have focused on one(natural gas (Ma et al, 2022), lique ed petroleum gas (Wang et al, 2022;Huo et al, 2022;Huang et al, 2022), propane-air (Chen et al, 2021), hydrocarbon oil and gas mixtures (Wang et al, 2020b), hydrogen (Sathiah et al, 2016), etc.). For the gases studied in this paper, the current research involves experimental studies (Wang et al, 2018;Bao et al, 2016) and the in uence of different in uencing factors on the de agration process.…”

Section: Introductionmentioning

confidence: 99%

Study on the Characteristics of Single Tank Leakage Explosion Accidents in Tank Farm

Oyang,

Song,

et al. 2024

Preprint

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To quantitatively evaluate the consequences of a chain-detonation accident from a single tank leak in a tank farm, this paper simulates a leak-detonation accident based on the computational fluid dynamics (CFD) model with three different arrangements of field, one-way and L-shape distribution, and evaluates its impact on personnel and buildings. It combines the diffusion of combustible gases with subsequent deflagration due to accidental ignition. The diffusion behavior of the leaking gas with the wind is predicted and the danger zone created within the tank area is evaluated. Subsequently, a deflagration scenario due to the ignition of the flammable gas is simulated predicting the overpressure and high-temperature deflagration loads. Finally, the impact of a leaked gas deflagration on other tanks and personnel in the tank farm was evaluated. The hazardous area resulting from the diffusion of the leaking gas is mainly located on the right of the leaking tank. The hazards posed by different distribution arrangements of tank types also differed. The minimum radius to ensure safety under deflagration overpressure is 11.97 m. The present work is conducive to the determination of the safe distance between individual tanks in the new tank farm and the formulation of the safety protection.

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Propane-air mixture deflagration hazard with different ignition positions and restraints in large-scale venting chamber

Cited by 7 publications

References 20 publications

Risk Assessment of Liquefied Petroleum Gas Explosion in a Limited Space

Risk Assessment of Liquefied Petroleum Gas Explosion in a Limited Space

Experimental and Numerical Study on Deflagration Characteristics of Large-Scale Propane–Air Mixture

Study on the Characteristics of Single Tank Leakage Explosion Accidents in Tank Farm

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