LNG槽罐车泄漏-燃烧耦合演化特性分析

doi:10.16265/j.cnki.issn1003-3033.2020.01.013

中国安全科学学报 ›› 2020, Vol. 30 ›› Issue (1): 81-86.doi: 10.16265/j.cnki.issn1003-3033.2020.01.013

LNG槽罐车泄漏-燃烧耦合演化特性分析

项莉¹, 谢启源¹ 副研究员, 张杰², 卢启钊¹, 周锋²

1.中国科学技术大学火灾科学国家重点实验室,安徽合肥 230027;
2.应急管理部上海消防研究所,上海 200032

收稿日期:2019-10-21 修回日期:2019-12-02 出版日期:2020-01-28 发布日期:2021-01-22
作者简介:项莉 (1993—),女,安徽安庆人,硕士研究生,研究方向为液化天然气泄漏扩散分析E-mail: xlxl@mail.ustc.edu.cn。
基金资助:
科技部“十三五”国家重点研发计划项目(2017YFC0806600);上海市青年科技英才扬帆计划(16YF1401900)。

Characteristic analysis on leakage-burning coupling of LNG tanker

XIANG Li¹, XIE Qiyuan¹, ZHANG Jie², LU Qizhao¹, ZHOU Feng²

1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei Anhui 230027, China;
2. Shanghai Fire Research Institute of Ministry of Emergency Management, Shanghai 200032, China

Received:2019-10-21 Revised:2019-12-02 Online:2020-01-28 Published:2021-01-22

摘要/Abstract

摘要： 为分析液化天然气(LNG)槽罐车泄漏燃料着火造成的“泄漏—燃烧—热反馈—槽罐内升温升压—强化泄漏”事故链演化过程,基于我国典型槽罐车工况,构建泄漏-燃烧耦合发展模型,研究泄漏相态、储罐充装率和泄漏孔径对该类泄漏事故演化过程的影响特性。结果表明:液相泄漏时,泄漏速率与燃烧反馈热流之间往往出现正反馈演变,造成LNG储罐内压强突然急剧升高爆炸;低充装率储罐在泄漏初期危险性较高,而高充装率可达储罐峰值压强更大;在一定孔径范围和充装率条件下,储罐内可达峰值压强随孔径的增大而呈减小趋势。

关键词: 液化天然气(LNG), 槽罐车, 泄漏-燃烧耦合, 数值模型, 超压爆炸

Abstract: In order to analyze evolution of accident chain of "leakage-burning-heat feedback-temperature/pressure increase-stronger leakage", which is triggered by ignition of fuel leaked from LNG tanker, a coupling model of leakage-burning was developed based on typical situation in China. And effects of leakage phase, filling ratio and aperture on leakage accident development were analyzed. The results show that pressure in tanker might increase sharply and explode caused by positive feedback between leakage rate and burning heat flow at the leakage stage of liquid. It would be more dangerous in early leakage stage for low filling ratios while peak pressure would be higher for high filling ratios. The peak pressure of tanks normally decreases along with increase of aperture within certain range and at certain filling ratios.

Key words: liquefied natural gas (LNG), tanker, leakage-burning coupling, theoretical analysis, overpressure and explosion

中图分类号:

X932

项莉, 谢启源, 张杰, 卢启钊, 周锋. LNG槽罐车泄漏-燃烧耦合演化特性分析[J]. 中国安全科学学报, 2020, 30(1): 81-86.

XIANG Li, XIE Qiyuan, ZHANG Jie, LU Qizhao, ZHOU Feng. Characteristic analysis on leakage-burning coupling of LNG tanker[J]. China Safety Science Journal, 2020, 30(1): 81-86.

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LNG槽罐车泄漏-燃烧耦合演化特性分析

Characteristic analysis on leakage-burning coupling of LNG tanker

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