Quantitative evaluation of explosion consequences in urban underground drainage

Li, Yuanzhi; Qian, Xinming; Yuan, Mengqi; Hou, Longfei; Wu, Yanyan; Duanmu, Weike; Chen, Jun

doi:10.1016/j.tust.2020.103779

Cited by 6 publications

(3 citation statements)

References 28 publications

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“…The application of small-scale experiments could not fully evaluate the complex, simultaneous, and coupling effects of pressure, temperature, and seismic waves, which were not linearly related . There are fewer studies on the analysis of real explosion phenomena in large-scale gas explosion experiments. , In addition, natural wind and high-pressure gas leakage will increase the turbulence intensity of the gas cloud, which could aggravate the consequences of an explosion.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

“…17 There are fewer studies on the analysis of real explosion phenomena in large-scale gas explosion experiments. 18 , 19 In addition, natural wind and high-pressure gas leakage will increase the turbulence intensity of the gas cloud, which could aggravate the consequences of an explosion.…”

Section: Introductionmentioning

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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“…The utility tunnel not only saves urban space but also facilitates the management and maintenance of pipelines [2,3]. With strong policy support, the total mileage of urban underground utility tunnels in China has rapidly increased, making it the world's leader [4]. However, the frequent occurrence of fire accidents in these tunnels has drawn widespread public attention.…”

Section: Introductionmentioning

confidence: 99%

Research on the Fire Extinguishing Efficiency of Low-Pressure Water Mist in Urban Underground Utility Tunnel Cable Fires

Jia,

Xia,

Ning

et al. 2023

Fire

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Low-pressure water mist fire extinguishing systems are a cost-effective and highly reliable option for fire protection. However, they have not yet seen widespread use in urban underground utility tunnels. To validate the fire extinguishing effectiveness of the system in cable fires within urban utility tunnels and to identify the key factors influencing its efficiency, a scaled-down test platform for low-pressure water mist fire extinguishing in utility tunnels was constructed, and a series of fire extinguishing tests was conducted. The test results demonstrate that low-pressure water mist can rapidly and effectively extinguish cable fires in utility tunnels, with the quickest fire extinguishing time of 7 s. Within 50 s of activating the system, the internal temperature of the tunnel can be reduced from 650 °C to 40 °C. Among the influencing factors, the pressure and nozzle flow coefficient have a significant impact on the fire extinguishing efficiency, while nozzle spacing has a relatively smaller effect. Thus, when the nozzle spacing meets the requirement of “no dead zones”, priority should be given to increasing the pressure and nozzle flow coefficient.

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The destructive form and response analysis of buried concrete pipes under the action of internal explosion loads

Zhao,

Fang

et al. 2024

Engineering Failure Analysis

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Quantitative evaluation of explosion consequences in urban underground drainage

Cited by 6 publications

References 28 publications

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

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

Research on the Fire Extinguishing Efficiency of Low-Pressure Water Mist in Urban Underground Utility Tunnel Cable Fires

The destructive form and response analysis of buried concrete pipes under the action of internal explosion loads

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