Fire properties in near field of square fire source with longitudinal ventilation in tunnels

Kurioka, Hitoshi; Oka, Y.; Satoh, Hiroomi; Sugawa, Osami

doi:10.1016/s0379-7112(02)00089-9

Cited by 361 publications

(135 citation statements)

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“…So many scholars have studied smoke temperature distribution, backflow distance and critical ventilation velocity when there's fire in longitudinal ventilation system (Jafari et al 2011;Li et al 2012;Zhang et al 2012;Vauquelin and Y 2006;Hu et al 2004;. Kurioka et al (2003) use three kinds of model tunnels to study the fire phenomena in the near field of a fire in a tunnel and the aspect ratio of tunnel cross-section, heat release rate and longitudinal forced ventilation velocity were varied. Based on the study an empirical formulae for flame tilt, apparent flame height, maximum temperature of the smoke layer and its position were developed.…”

Section: ．Introductionmentioning

confidence: 99%

Maximum Smoke Temperature in Non-Smoke Model Evacuation Region for Semi-Transverse Tunnel Fire

Lou

Qiu

Long

2017

JAFM

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Smoke temperature distribution in non-smoke evacuation under different mechanical smoke exhaust rates of semi-transverse tunnel fire were studied by FDS numerical simulation in this paper. The effect of fire heat release rate (10MW 20MW and 30MW) and exhaust rate (from 0 to 160m 3 /s) on the maximum smoke temperature in non-smoke evacuation region was discussed. Results show that the maximum smoke temperature in non-smoke evacuation region decreased with smoke exhaust rate. Plug-holing was observed below the smoke vent when smoke exhaust rate increased to a certain value. Smoke spreading distance can be divided into three stages according to changes of smoke exhaust rate. The maximum smoke temperature model concluded that the peak temperature rise at tunnel vault is proportional to 0.75 power of dimensionless fire power. The maximum temperature in non-smoke evacuation region decays exponentially with the increase of smoke exhaust rate. However smoke vent interval influences the dimensionless maximum temperature in nonsmoke evacuation region slightly. Smoke vent interval influences the dimensionless maximum temperature in non-smoke evacuation region slightly.

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Section: ．Introductionmentioning

confidence: 99%

Maximum Smoke Temperature in Non-Smoke Model Evacuation Region for Semi-Transverse Tunnel Fire

Lou

Qiu

Long

2017

JAFM

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“…Alpert et al [8] provided simple correlation equations to predict the maximum temperature and velocity at a given position, based on a generalized theory and experimental data. Kurioka et al [9] proposed a model to predict the maximum smoke temperature under the tunnel ceiling based on model-scale experiments. Hu et al [10][11][12] conducted a series of full-scale experiments to investigate the smoke temperature distribution, velocity, and maximum temperature along the corridor.…”

Section: Introductionmentioning

confidence: 99%

Scaled Experimental Study on Maximum Smoke Temperature along Corridors Subject to Room Fires

et al. 2015

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Abstract:In room-corridor building geometry, the corridor smoke temperature is of great importance to fire protection engineering as indoor fires occur. Theoretical analysis and a set of reduced-scale model experiments were performed, and a virtual fire model was proposed, to investigate the correlations between the maximum smoke temperature in corridors and the smoke temperature in rooms. The results show that the dimensionless virtual fire heat release rate (HRR) is characterized by quadratic-polynomial of the dimensionless smoke temperature in fire rooms. The dimensionless distance from a virtual fire source to the corridor ceiling varies linearly with the dimensionless smoke temperature in a room. Results of multiple regression indicate that, at the impingement area of virtual fire, the dimensionless maximum smoke temperature in corridors is only related to the dimensionless virtual fire HRR; in the non-impingement area of a virtual fire, the dimensionless maximum smoke temperature in corridors is a function of the dimensionless virtual fire HRR and dimensionless longitude distance. The viscosity and conduction exhibit an insignificant impact on the maximum temperature in the corridor. Through replacing the parameters of virtual fire with the dimensionless smoke temperature in fire rooms, the correlations between dimensionless maximum temperature in corridors and the dimensionless smoke temperature in fire rooms were proposed. OPEN ACCESSSustainability 2015, 7 11191

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“…Many bench scale tests have been performed to study the fire characteristics, smoke movement and control in case of a tunnel fire [8,9]. Numerical simulations have also been tried to predict the fire development and to investigate into the efficiency of different smoke control methods in tunnels [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…Numerical simulations have also been tried to predict the fire development and to investigate into the efficiency of different smoke control methods in tunnels [10,11]. Functional relationships have been derived from laboratory scale tests [8,9,13]. All the numerical simulation results and the functional relationships should be validated, especially by full scale data.…”

Section: Introductionmentioning

confidence: 99%

Full Scale Experiments On Studying Smoke Spread In A Road Tunnel

Hu¹,

Huo²,

Wang³

et al. 2005

Fire Safety Science - Proceedings of the Eigth International Sy

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Three full scale tests were conducted in a road tunnel to study the smoke spread with different fire sizes and wind speed conditions. The smoke temperature under the ceiling, the smoke layer height distribution and the travel of the smoke front in a 1000 m long domain along the road tunnel were measured. Results showed that wind speed had much influence on the spread of smoke in the tunnel. When wind speed was such low as less than 1 m/s, a smoke layer could form and stabilize all along the tunnel. But when the wind speed was such high as more than 2 m/s, smoke layer could only be maintained in a distance of about 400 m in the downstream. The slowdown of the traveling of the smoke front in the downstream along the tunnel was more obvious when the wind speed was smaller. All these full scale data presented here can be used for further study on the verification or improvement of existing fire models for enhancing their applicability to such long tunnels.

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Fire properties in near field of square fire source with longitudinal ventilation in tunnels

Cited by 361 publications

References 7 publications

Maximum Smoke Temperature in Non-Smoke Model Evacuation Region for Semi-Transverse Tunnel Fire

Maximum Smoke Temperature in Non-Smoke Model Evacuation Region for Semi-Transverse Tunnel Fire

Scaled Experimental Study on Maximum Smoke Temperature along Corridors Subject to Room Fires

Full Scale Experiments On Studying Smoke Spread In A Road Tunnel

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