化工学报 ›› 2021, Vol. 72 ›› Issue (5): 2896-2904.DOI: 10.11949/0438-1157.20201574
• 过程安全 • 上一篇
收稿日期:
2020-11-03
修回日期:
2020-12-13
出版日期:
2021-05-05
发布日期:
2021-05-05
通讯作者:
周魁斌
作者简介:
吴月琼(1994—),女,硕士研究生, 基金资助:
WU Yueqiong(),ZHOU Kuibin(),HUANG Mengyuan,ZHOU Mengya
Received:
2020-11-03
Revised:
2020-12-13
Online:
2021-05-05
Published:
2021-05-05
Contact:
ZHOU Kuibin
摘要:
高压燃气储罐泄漏极易诱发喷射火。通过搭建储罐壁面限制条件下不同喷射角度的喷射火实验装置,对近喷口流场受限的喷射火进行了系统研究,并验证了装置测试的可重复性。实验结果表明,储罐壁面限制条件下推举高度小于自由射流的推举高度,并通过数值模拟分析了两种空间条件下空气卷吸流场的差异性,从而物理解释了储罐壁面限制条件对推举高度的影响。两种空间条件下火焰长度都随喷射角度的增加而减小,但自由垂直射流的火焰长度小于储罐壁面限制条件下的火焰长度。火焰行为由浮力控制转为动量控制的临界Froude数与喷射角度和空间限制条件无关。研究还发现,与自由射流相比,储罐壁面的阻塞效应会降低火焰的推举速度,提高火焰的吹熄速度。
中图分类号:
吴月琼, 周魁斌, 黄梦源, 周梦雅. 储罐壁面限制条件下喷射火火焰行为[J]. 化工学报, 2021, 72(5): 2896-2904.
WU Yueqiong, ZHOU Kuibin, HUANG Mengyuan, ZHOU Mengya. Flame behavior of jet fire confined by the tank wall[J]. CIESC Journal, 2021, 72(5): 2896-2904.
倾斜角度θ /(°) | 流速Ue/(m/s) | Fr= |
---|---|---|
0 | 8.96~75.45 | 2.7×103~1.9×105 |
30 | 8.49~75.45 | 2.5×103~1.9×105 |
45 | 8.72~75.45 | 2.6×103~1.9×105 |
60 | 8.25~75.45 | 2.3×103~1.9×105 |
表1 实验工况
Table 1 Experimental conditions
倾斜角度θ /(°) | 流速Ue/(m/s) | Fr= |
---|---|---|
0 | 8.96~75.45 | 2.7×103~1.9×105 |
30 | 8.49~75.45 | 2.5×103~1.9×105 |
45 | 8.72~75.45 | 2.6×103~1.9×105 |
60 | 8.25~75.45 | 2.3×103~1.9×105 |
图3 实验的可重复性判定(θ=0°,Ue=56.69 m/s)
Fig.3 Test repeatability justified by the comparison of two repeatable tests under the jet angle of 0° and the exit velocity of 56.69 m/s
图15 丙烷喷射火焰的吹熄和淬灭的临界判据(垂直虚线表示临界压力比条件)
Fig.15 Blowout and quench boundary of propane jet flame(vertical dashed line indicates the critical pressure ratio condition)
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