Effects of low air pressure on radiation-controlled rectangular ethanol and n-heptane pool fires

Tu, Ran; Fang, Jun; Zhang, Yongming; Zhang, Jun; Zeng, Yi

doi:10.1016/j.proci.2012.06.036

Cited by 137 publications

(57 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…692 and 665°C. The observation of higher flame temperature in Lhasa is consistent with previous studies [2,4,6], which can be explained by the decreasing radiative heat loss [35,44] and weaker ambient air entrainment cooling for lower air density [2]. There is less soot loading in flames when the pressure is reduced, while the ensemble flame volume or the mean beam length becomes larger with decreasing pressure.…”

Section: Axial Temperature Distributionsupporting

confidence: 90%

“…The burning intensity under low pressure can be determined by examining the pressure effects on the three heat feedback terms individually. As suggested by Fang et al [4,6], the burning intensities vary with pressure as _ m 00 $ D P a . For the conductive term, it has…”

Section: Mass Lossmentioning

confidence: 87%

“…Previous studies indicated that a slightly higher flame temperature aroused by the decreasing pressure [6,35,44], then the counteraction of T f and P finally leads to the little decrease in X r under low pressure [4]. However, in most situations, e.g.…”

Section: Soot and Flame Radiationmentioning

confidence: 97%

“…Hu et al [3] conducted n-Heptane fire tests in Dangxiong (4350 m/ 5.91 kPa) and Lhasa, and suggested that _ m 00 $ fcn ðD; PÞ, with D the pool diameter. Fang et al [4,5] Tu et al [6] indicated that _ m 00 $ D P under radiation-controlled condition. Cardboard box fires of different sizes specified by federal aviation administration (FAA) minimum performance standard (MPS) [7] were tested in Hefei and Lhasa by Niu and Yao et al [8,9], where it is found that mass burning rate and radiative heat flux decrease while plume temperature increases under lower pressure.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Experimental analysis of low air pressure influences on fire plumes

Zhou

Yao

et al. 2014

International Journal of Heat and Mass Transfer

View full text Add to dashboard Cite

a b s t r a c tTo examine the pressure effect on burning rate, flame height and axial temperature distribution of diffusion fires, experimental measurement and theoretical analysis on circular n-Heptane fires with serial sizes were conducted at two altitudes, i.e. 100.8 kPa (in a sea-level city Hefei) and 64.3 kPa (in a Tibetan city Lhasa). From the results, the mean burning rate at quasi-steady stage and boiling stage consistently with the correlation coefficients derived from the current low-pressure measurements. Analysis shows that the flame height and the plume temperature increase with the pressure rise as a power function of pressure for the same pool size.

show abstract

Section: Axial Temperature Distributionsupporting

confidence: 90%

Section: Mass Lossmentioning

confidence: 87%

Section: Soot and Flame Radiationmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental analysis of low air pressure influences on fire plumes

Zhou

Yao

et al. 2014

International Journal of Heat and Mass Transfer

View full text Add to dashboard Cite

show abstract

“…There is great potential fire hazard due to the leakage of nature gas from the pipelines. The characteristic of flame height has been studied for decades as an important aspect of fundamental fire research [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. The fire plume was firstly mentioned by Schmidt [1], then the models of temperature along the flame center line, the radius and the vertical velocity of jet flame were considered [3].…”

Section: Introductionmentioning

confidence: 99%

An experimental study of flame height and air entrainment of buoyancy-controlled jet flames with sidewalls

Tao

Shen

Zong

et al. 2016

Fuel

View full text Add to dashboard Cite

Experimental investigation on the effect of ambient pressure on thermal runaway and fire behaviors of lithium‐ion batteries

et al. 2019

View full text Add to dashboard Cite

Summary To investigate the impacts of ambient pressure on thermal runaway and fire behaviors of lithium‐ion battery (LIB), experimental measurement and theoretical analysis with serial conditions are conducted at two altitudes. The well‐designed experimental equipment and operating conditions have enabled the accurate evaluation of ambient pressure effects. Results show that the first abrupt temperature change in Hefei (ambient pressure 100.8 kPa) is higher than that in Lhasa (64.3 kPa). The difference in ambient pressure at two altitudes leads to different relief valve crack temperature and time. The average burning rate in Hefei is larger than that in Lhasa, and the estimated pressure effect factor is quite different for detailed pack conditions and varies within the range of 0.083‐1.39. The ambient pressure has a greater effect on the heat release rate and total heat release than the mass loss, and the effective combustion heat under the low pressure is lower than that in normal condition. This work can provide more comprehensive and useful data for the safety management of LIBs at low pressure environments.

show abstract

Effects of low air pressure on radiation-controlled rectangular ethanol and n-heptane pool fires

Cited by 137 publications

References 20 publications

Experimental analysis of low air pressure influences on fire plumes

Experimental analysis of low air pressure influences on fire plumes

An experimental study of flame height and air entrainment of buoyancy-controlled jet flames with sidewalls

Experimental investigation on the effect of ambient pressure on thermal runaway and fire behaviors of lithium‐ion batteries

Contact Info

Product

Resources

About