桦木木垛火羽流竖直方向烟颗粒形貌特征

doi:10.16265/j.cnki.issn1003-3033.2017.09.010

中国安全科学学报 ›› 2017, Vol. 27 ›› Issue (9): 57-62.doi: 10.16265/j.cnki.issn1003-3033.2017.09.010

桦木木垛火羽流竖直方向烟颗粒形貌特征

张毅¹ 工程师, 郭晨宁²

1 中粮集团中国粮油控股有限公司,北京 100020
2 中国计量大学质量与安全工程学院,浙江杭州 310018

收稿日期:2017-06-28 修回日期:2017-08-13 出版日期:2017-09-20 发布日期:2020-11-16
作者简介:张毅 (1984—),男,安徽安庆人,工程师,主要从事火灾科学、危险源辨识及风险控制方面的研究。E-mail:blueweek@sina.com。
基金资助:
国家自然科学基金资助(51306168);浙江省自然科学基金资助(17E060004)。

Experimental study on morphology of betula crib soot particles sampled at different heights

ZHANG Yi¹, GUO Chenning²

1 China Agri-Industries Holdings Limited, COFCO Corporation,Beijing 100020, China
2 College of Quality and Safety Engineering, China Jiliang University, Hangzhou Zhejiang 310018, China

Received:2017-06-28 Revised:2017-08-13 Online:2017-09-20 Published:2020-11-16

摘要/Abstract

摘要： 为研究桦木木垛火羽流竖直方向烟颗粒的形貌特征,利用自行搭建的小尺寸试验平台开展试验,采集不同采样高度处的烟颗粒,结合场发射扫描电镜(SEM)图像,通过相关的图像处理软件,分析烟颗粒形貌特征和尺度分布。研究表明:当采样高度不高于0.8m时,烟颗粒被表面大量焦油包裹而呈片状;当采样高度高于0.8 m时,随着采样高度的增加,附着在采样网上的焦油逐渐减少,烟颗粒逐渐显露出来;烟颗粒平均粒径分布在44～47 nm之间。

关键词: 桦木木垛, 不同垂直高度, 烟颗粒, 形貌特征, 粒径分布, 焦油

Abstract: To understand the soot formation of typical fuels at different heights from burn surface, experiments were carried out, the size and morphology of soot aggregates produced from burning of a betula crib were studied by both extractive sampling and subsequent image analysis. The morphology of soot was observed by scanning electron microscope(SEM). The morphology of soot aggregates and the diameter distribution of primary particles were analyzed for the soot sampled at different heights. The results show that when sampling heights are not greater than 0.8 m, irregular sheet structures and flake-like masses are observed from the burning of the crib, that burning of the crib can produce tar, which adheres on the surface of the sampling grid, that the size and thickness of the coating layer decreases with increasing height, that the amount of small particles in the fragments increases with increasing height, and that the average diameter of the primary particles is 44-47 nm when sampling is made at different heights above the fire source.

Key words: betula crib, plume vertical height, soot particle, morphology, particle size distribution, tar

中图分类号:

X932

张毅, 郭晨宁. 桦木木垛火羽流竖直方向烟颗粒形貌特征[J]. 中国安全科学学报, 2017, 27(9): 57-62.

ZHANG Yi, GUO Chenning. Experimental study on morphology of betula crib soot particles sampled at different heights[J]. China Safety Science Journal, 2017, 27(9): 57-62.

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桦木木垛火羽流竖直方向烟颗粒形貌特征

Experimental study on morphology of betula crib soot particles sampled at different heights

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