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This paper investigates experimentally the effect of cross-wind on near-wall buoyant turbulent diffusion flame length and tilt, which has not been quantified in the literatures. Comprehensive experiments are conducted in a wind tunnel [66m (Length)×1.5m (Width)×1.3m (Height)] employing a 5cmsquare gaseous fuel sand box burner as fire source. Two different fire source positions are considered: at the...
Styrene-butadiene-styrene copolymers (SBS) modified asphalt has been widely used for extending the service life of pavement. Understanding the natural weathering mechanism of SBS modified asphalt (SBSMA) is useful for both the extension of service life and recycling SBSMA pavement. The natural weathering process of base asphalt (BA) and SBSMA is traced by characterizing the rheological and structural...
This paper investigates the flame size (i.e. envelop surface area and flame volume) and the volumetric heat release rate of turbulent jet diffusion flames, in both normal and in a sub-atmospheric pressure. Experiments on turbulent jet diffusion flames, produced with nozzles of 4, 5, 6 and 8mm in diameter and using propane as fuel, have been carried out at two different altitudes: Hefei, 50m and 100kPa...
The present work is an experimental investigation into the plume axial temperature profile of hydrocarbon pool fires from axisymmetrical to linear- source geometry in normal (100kPa) and sub-atmospheric (64kPa) pressures. Five rectangular pool with the same area S (36 cm 2 ) but different aspect ratios (long side divided by short side n=L/W=1, 2, 3, 4, 8) are used. The plume axial temperature...
This paper reports new experimental observations on flame radiation fraction of sooty turbulent buoyant jet diffusion flames in a reduced atmospheric pressure (at high altitude in Tibet) and corresponding scaling theoretical interpretations. A global correlation of the flame radiation fraction with Reynolds number is proposed for both the reduced- and normal pressures. Experiments are carried out...
The burning characteristics of conduction-controlled rectangular hydrocarbon pool fires in a reduced pressure atmosphere have not been revealed in the past. In this paper, rectangular pool fires with same area S (36cm 2 ) but different aspect ratios (L/W=1, 2, 3, 4) are burnt correspondingly in both normal (100kPa; Hefei altitude 50m) and reduced (64kPa; Lhasa-altitude 3650m) pressure atmosphere...
This paper reports new experimental findings at a reduced atmospheric pressure (at high altitude in Tibet) for turbulent buoyant jet diffusion flames and global correlations for both normal and this reduced atmospheric pressure. Comparative experiments are carried out in Hefei (50m, 100kPa) and Lhasa (3650m, 64kPa) in China to measure the mean flame height and lift-off behaviors. The turbulent jet...
Characteristics of a vertical jet fire in a reduced pressure atmosphere (at high altitude) have not been quantified in the literatures. In the reduced pressure atmosphere, the air/oxygen density is lower, which in turn affects both combustion and entrainment, and hence the axial temperature profile of a diffusive turbulent jet fire. Experiments have been conducted in this work to investigate the axial...
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