NUMERICAL STUDY OF FLAME PROPERTIES AND ENERGY BALANCE IN MEDIUM SCALE n-HEPTANE POOL FIRE WITH VARIOUS LIP HEIGHTS AND WIND VELOCITIES

被引：0

作者：

Bathina, Siva K. ^{[1
]}

Siddapureddy, Sudheer ^{[1
]}

机构：

[1] Indian Inst Technol Dharwad, Dept Mech Engn, Dharwad 580011, Karnataka, India

来源：

HEAT TRANSFER RESEARCH | 2021年 / 52卷 / 18期

关键词：

pool fire; wind velocity; lip height; radiation heat feedback; large-eddy simulations; HEAT FEEDBACK; BURNING RATES; FUEL SURFACE; SIMULATIONS; DYNAMICS;

D O I：

10.1615/HeatTransRes.2021039480

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

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.

引用

页码：77 / 93

页数：17

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