Effects of Fire Location and Forced Air Volume on Fire Development for Single-Ended Tunnel Fire with Forced Ventilation

Zhao, Jinlong; Wang, Zhenhua; Hu, Zhenqi; Cui, Xinyuan; Peng, Xiandu; Zhang, Jianping

doi:10.3390/fire6030111

Cited by 6 publications

(4 citation statements)

References 25 publications

(30 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In reference [9], a numerical model of a driving roadway was established but with a different research focus. Their study concentrated on the flow field distribution of the longitudinal section and placed the fire source in the middle of the roadway.…”

Section: Discussionmentioning

confidence: 99%

“…The results of this study provide new experimental information, which will help to improve understanding of the characteristics of tunnel fires during construction and allow firefighters to make better decisions in the rescue process. Jinlong Zhao [9] discussed the influence of fire location and air volume on the development of tunnel fires. The distribution characteristics of the flow field in the longitudinal section of the excavation space were analyzed and divided into three regions: turbulent zone, turbulent transition zone, and steady flow zone.…”

Section: Related Workmentioning

confidence: 99%

See 1 more Smart Citation

Study on the Temperature and Smoke Movement in the Event of a Fire in a Semiclosed Tunnel under Water Spray

Li,

Zhang,

et al. 2023

Fire

View full text Add to dashboard Cite

Semiclosed tunnels are very common in engineering construction. They are not connected, so they easily accumulate heat. Once a fire breaks out in a semiclosed tunnel, the route for rescue workers to enter is limited, so it is tough to get close to the fire source. In this paper, taking a mine excavation roadway with local pressure ventilation as an example, the temperature field distribution and water spray fire prevention characteristics of the excavation roadway face were studied using numerical simulation and theoretical analysis. This paper provides an explanation of a dynamics-based smoke management method for water spraying in a semiclosed tunnel as well as the equilibrium relationship between droplet drag force and smoke buoyancy. A method was first developed to calculate the quantity of smoke blockage based on the thickness of the smoke congestion. The local ventilation and smoke movement created a circulating flow in the excavation face, which was discovered by investigating the velocity and temperature fields of the excavation face. The size of the high-temperature area and the pattern of temperature stratification varied due to this circulating flow. When local ventilation and sprinkler systems were operating simultaneously, when the volume of smoke was small, the smoke avoided the majority of the water spray effect with the circulation flow; however, when the volume of smoke was large, the effect of the circulation flow decreased and the smoke gathered close to the sprinkler head. At this time, the blocking effect of the water spray was significant. The mean square error analysis revealed that activating the sprinkler had the most significant cooling impact on the wall on one side of the air duct.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Study on the Temperature and Smoke Movement in the Event of a Fire in a Semiclosed Tunnel under Water Spray

Li,

Zhang,

et al. 2023

Fire

View full text Add to dashboard Cite

show abstract

“…Research confirming the validity of using natural fibers as reinforcement to improve the thermal properties of polymer composites has been documented in numerous industry publications, including studies [ 53 , 54 , 55 ].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Urtica dioica and Vitis vinifera Fibers on the Thermal Properties and Flammability of Polylactide Composites

Majka,

Piech,

Piechaczek

et al. 2024

Materials

View full text Add to dashboard Cite

This study focuses on examining the influence of bast fibers on the flammability and thermal properties of the polylactide matrix (PLA). For this purpose, Urtica dioica and Vitis vinifera fibers were subjected to two types of modifications: mercerization in NaOH solution (M1 route) and encapsulation in an organic PLA solution (M2 route). In a further step, PLA composites containing 5, 10, and 15 wt% of unmodified and chemically treated fibers were obtained. The results of the tests show that only biocomposites containing mercerized fibers had a nearly 20% reduced flammability compared to that of PLA. Moreover, the biofiller obtained in this way belongs to the group of flame retardants that generate char residue during combustion, which was also confirmed by TGA tests. The M2 modification route allowed to achieve higher mass viscosity than the addition of unmodified and M1-modified fibers. The reason is that fibers additionally encapsulated in a polymer layer impede the mobility of the chain segments. The inferior homogenization of the M2-modified fibers in the PLA matrix translated into a longer combustion time and only a 15% reduction in flammability.

show abstract

“…This Special Issue touches on many issues central to understanding turbulent combustion and fire accidents in confined spaces [16][17][18]. These articles highlight the particularity and hazards of fires in confined spaces, which should receive widespread attention and be researched in depth.…”

Section: Introductionmentioning

confidence: 99%

Smoke Movement and Control in Tunnels under Construction: Recent Research Progress and Future Directions

Yao

Xia

Wang

et al. 2023

Fire

Self Cite

View full text Add to dashboard Cite

show abstract

Effects of Fire Location and Forced Air Volume on Fire Development for Single-Ended Tunnel Fire with Forced Ventilation

Cited by 6 publications

References 25 publications

Study on the Temperature and Smoke Movement in the Event of a Fire in a Semiclosed Tunnel under Water Spray

Study on the Temperature and Smoke Movement in the Event of a Fire in a Semiclosed Tunnel under Water Spray

The Influence of Urtica dioica and Vitis vinifera Fibers on the Thermal Properties and Flammability of Polylactide Composites

Smoke Movement and Control in Tunnels under Construction: Recent Research Progress and Future Directions

Contact Info

Product

Resources

About