二氧化碳爆破射流温度场演化规律实验研究

倪昊; 杨仁树; 谭卓英; 丁晨曦; 林海; 王渝; 吴浩天

doi:10.11883/bzycj-2023-0227

二氧化碳爆破射流温度场演化规律实验研究

doi: 10.11883/bzycj-2023-0227

倪昊^{1, 2,},
杨仁树^1, ,,
谭卓英¹,
丁晨曦¹,
林海¹,
王渝¹,
吴浩天¹

1.
北京科技大学土木与资源工程学院，北京 100083
2.
煤炭科学技术研究院有限公司，北京 100013

基金项目: 国家自然科学基金（51934001）

详细信息

作者简介:
倪　昊（1986－　），男，博士研究生，490614699@qq.com

通讯作者:
杨仁树（1963－　），男，博士，教授，博士生导师，yangrsustb@163.com

中图分类号: O389
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- 文章访问数: 128
- HTML全文浏览量: 53
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- 被引次数: 0
出版历程
- 收稿日期: 2023-06-29
- 修回日期: 2023-10-06
- 网络出版日期: 2023-10-08
- 刊出日期: 2023-12-12

An experimental study on temperature field evolution of carbon dioxide blasting jets

NI Hao^{1, 2
,},
YANG Renshu^{1
, ,},
TAN Zhuoying¹,
DING Chenxi¹,
LIN Hai¹,
WANG Yu¹,
WU Haotian¹

1.
School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China
2.
China Coal Research Institute Company Limited, Beijing 100013, China

摘要

摘要: 为了研究二氧化碳爆破射流温度场的演化规律，构建了二氧化碳爆破红外热成像实验系统，开展了二氧化碳爆破实验，分析了二氧化碳爆破射流的空间发展和温度演变过程。研究结果表明：在出现超温现象之前，二氧化碳射流的温度梯度分别为外圈最高、内圈稍低，核心区域温度最低；当出现超温现象时，射流的温度梯度分别为外圈最低、内圈稍高，核心区域温度最高；射流周围的环境温度呈现先降低，后升高的现象。初始泄能压力越高，二氧化碳爆破射流的温度峰值越高，最高温度达到了133.7 ℃，到达温度峰值所需的时间越长；初始泄能压力越低，温度谷值越低，最低温度为−3.4 ℃，到达温度谷值所需的时间越短；射流温度的峰值基本出现在二氧化碳爆破器泄能的初始阶段，随后小幅度上升，再跌入谷值。射流升温的主要阶段在管内，二氧化碳爆破射流的温度总体呈现先上升后下降的趋势。
- 二氧化碳爆破 /
- 射流 /
- 温度场 /
- 红外热成像 /
- 状态方程
Abstract: In order to study the evolution law of the temperature field of carbon dioxide blasting jet, an infrared thermal imaging test system of carbon dioxide blasting was constructed, which enabled the space development and temperature evolution of the carbon dioxide blasting jet being analyzed through carbon dioxide blasting experiment. This paper will first introduce the principle of carbon dioxide blasting technology and the structure of carbon dioxide blasting device, and expound the physical properties of carbon dioxide. Through the operation of Span-Wagner equation of state, the relationship between temperature and pressure of carbon dioxide is revealed, and then the temperature-pressure relationship curve is drawn. Secondly, the evolution cloud map of jet temperature field is analyzed, showing that before the overtemperature phenomenon, the temperature gradient of the jet is the highest in the outer ring, slightly lower in the inner ring, and the lowest in the core region. While overtemperature occurs, the temperature gradient of the carbon dioxide jet is the lowest in the outer ring, slightly higher in the inner ring, and the highest in the core region. Therefore, the ambient temperature around the jet decreases first and then increases during the carbon dioxide explosion. Finally, the temperature-time curve of the jet is studied. One the one hand, the higher the initial discharge pressure, the higher the peak temperature of the carbon dioxide blasting jet, and the longer the time required to reach the peak temperature, with the highest temperature in the test reaching 133.7 ℃. While the lower the initial energy release pressure, the lower the temperature valley value, the shorter the time required to reach the temperature valley value, with the lowest temperature in the test being −3.4 ℃. On the other hand, the peak of jet temperature basically appears in the initial stage of blasting energy discharge, and then the temperature rises slightly, followed by the temperature drop to the valley value. The main stage of jet heating is in the pipe, and the study shows that the temperature of carbon dioxide blasting jet generally presents a trend of first rising followed by decreasing.
- carbon dioxide /
- jet /
- temperature field /
- infrared thermal imaging /
- equation of state

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图 1 二氧化碳压力-温度相图

Figure 1. Pressure-temperature phase diagram of carbon dioxide

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图 2 二氧化碳爆破器结构

Figure 2. Structure of a carbon dioxide blaster

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图 3 二氧化碳爆破射流红外热成像系统

Figure 3. Carbon dioxide blasting jet infrared shooting system

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图 4 p_c=200 MPa时的二氧化碳爆破射流温度场云图

Figure 4. Cloud images of temperature field of carbon dioxide blasting jet at p_c=200 MPa

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图 5 p_c=250 MPa时的二氧化碳爆破射流温度场云图

Figure 5. Cloud images of temperature field of carbon dioxide blasting jet at p_c=250 MPa

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图 6 p_c=300 MPa时的二氧化碳爆破射流温度场云图

Figure 6. Cloud images of temperature field of carbon dioxide blasting jet at p_c=300 MPa

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图 7 p_c=200 MPa时二氧化碳爆破射流的温度-时间曲线

Figure 7. Temperature-time plots of the carbon dioxide blasting jet at p_c=200 MPa

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图 8 p_c=250 MPa时二氧化碳爆破射流的温度-时间曲线

Figure 8. Temperature-time plots of the carbon dioxide blasting jet at p_c=200 MPa

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图 9 p_c=300 MPa时二氧化碳爆破射流温度-时间曲线

Figure 9. Temperature-time plots of the carbon dioxide blasting jet at p_c=300 MPa

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表 1 实验参数

Table 1. Experimental parameters

实验	二氧化碳爆破器	爆破片材质	爆破片厚度/ mm	爆破片抗剪强度/MPa	额定液态二氧化碳充装压力/MPa	额定液态二氧化碳充装量/g	额定发热剂量/g
1	MZL300-95/1300	Q235	4	200	10	1500	400
2	MZL300-95/1300	Q235	5	250	10	1500	400
3	MZL300-95/1300	Q235	6	300	10	1500	400

下载: 导出CSV

表 2 实验结果

Table 2. Experimental results

实验	爆破片抗剪强度/MPa	环境温度/℃	峰值温度/℃	峰值温度与环境温度之差/℃	到达峰值温度的时间/ms	谷值温度/ ℃	谷值温度与峰值温度之差/℃	到达谷值温度的时间/ms
1	200	30.1	41.3	11.2	80.1	−3.4	44.7	129.5
2	250	21.4	53.5	32.1	89.3	2.1	51.4	134.2
3	300	20.5	133.7	113.2	97.4	10.2	123.5	133.7

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