Publicou 18 edições por ano
ISSN Imprimir: 1064-2285
ISSN On-line: 2162-6561
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NUMERICAL STUDY OF FLAME PROPERTIES AND ENERGY BALANCE IN MEDIUM SCALE n-HEPTANE POOL FIRE WITH VARIOUS LIP HEIGHTS AND WIND VELOCITIES
RESUMO
In this work, large-eddy simulations are performed using fire dynamic simulator to study the effect of wind and lip heights of a 0.3-m circular n-heptane pool fire. Wind velocities from 0.25 m/s to 2.3 m/s are considered to predict the flame tilt, mass burning rate, and various heat feedbacks. The results depict the maximum ratio of burning rate with wind to without wind as 1.36 and 1.26 of lip heights 0.025 m and 0.05 m, respectively. The radiation and convection feedback contributions range from 90.9% to 42.7% and from 9.9% to 57.3% for the lip height 0.025 m, respectively, and from 99.3% to 65.0% and from 0.7% to 35.0% for the lip heights 0.05 m, respectively. At relatively lower wind velocities, a larger lip height offers four times higher relative feedback (radiation to convection) contribution than a smaller lip height. Furthermore, at relatively higher wind velocities, the convection is predominant for smaller and radiation is predominant for larger lip heights.
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