Li/SF<sub>6</sub>反应动力学基本参数及现象研究

吴浩齐; 骆政园; 白博峰

doi:10.11993/j.issn.2096-3920.2023-0108

Li/SF₆反应动力学基本参数及现象研究

doi: 10.11993/j.issn.2096-3920.2023-0108

西安交通大学动力工程多相流国家重点实验室, 陕西西安, 710049

基金项目: 国家级基础加强项目资助(No. 2020-JCJQ-ZD).

详细信息

作者简介:
吴浩齐(1999-), 男, 在读硕士, 主要研究方向为金属燃料燃烧数值仿真

中图分类号: TJ630.32; U674
计量
- 文章访问数: 15
- HTML全文浏览量: 3
- PDF下载量: 5
- 被引次数: 0
出版历程
- 收稿日期: 2023-09-18
- 修回日期: 2023-10-29
- 录用日期: 2023-10-27
- 网络出版日期: 2024-01-18

Study on kinetic parameters and phenomena of Li/SF₆ reaction

State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China

摘要

摘要: 为探究不同温度及压力条件下锂六氟化硫(Li/SF₆)燃烧现象及反应动力学参数, 利用激波诱导高压热载荷激励Li/SF₆燃烧实验台测量了温度范围为830 ~1 400 K, 压力范围为0.8 ~11 atm时的点火滞燃期; 利用可视化实验段探究了Li/SF₆燃烧过程、基本发光现象等规律; 利用着火滞燃期与温度和压力呈现出典型的Arrhenius依赖关系, 通过多元线性回归法得出反应动力学参数。研究结果表明, Li/SF₆燃烧的点火滞燃期随温度、压力的升高而减少, 发光现象随压力升高由红色孤立火核逐渐转化为白色明亮火焰, 并结合实验测定的着火滞燃期求出了指前因子A、指数因子n和活化能Ea, 为明晰燃烧特性、构建数值模拟提供了重要依据。
- Li/SF₆燃烧 /
- 点火滞燃期 /
- 反应动力学 /
- 激波
Abstract: In order to investigate the phenomenon and kinetic parameters of Li/SF₆ combustion under different temperature and pressure conditions, the ignition delay period of Li/SF₆ combustion test platform was measured by using the shock wave induced high pressure thermal load excitation when the temperature range was 830 K~1 400 K and the pressure range was 0.8 atm~11 atm. The law of Li/SF₆ combustion process and basic luminescence phenomena were investigated by visualization experiment section. Based on the typical Arrhenius dependence between ignition delay period and temperature and pressure, the reaction kinetic parameters were obtained by multiple linear regression method. The results show that the ignition delay period of Li/SF₆ combustion decreases with the increase of temperature and pressure, and the luminescence phenomenon gradually changes from red isolated fire nucleus to white bright flame with the increase of pressure. The pre-index factor A, exponential factor n and activation energy Ea are obtained based on the experimental ignition delay period, which provides an important basis for the identification of combustion characteristics and the construction of numerical simulation.
- Li/SF₆ combustion /
- ignition delay period /
- reaction kinetics /
- shock wave

HTML全文

图 1 浸没燃烧反应器构型示意图

Figure 1. Schematic diagram of submerged combustion reactor configuration

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图 2 Li/SF₆反应的高压激波管示意图

Figure 2. Schematic diagram of high pressure shock tube for Li/SF₆ reaction

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图 3 Li/SF₆燃烧反应着火滞燃期定义

Figure 3. Definition of Li/SF6 combustion reaction ignition delay period

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图 4 T=933.7 K、P=2.00 atm燃烧现象(单帧间隔0.5 ms)

Figure 4. T=933.7 K, P=2.00 atm combustion phenomenon (single frame interval 0.5 ms

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图 5 T=933.4 K、P=2.64 atm燃烧现象(单帧间隔0.5 ms)

Figure 5. T=933.4 K, P=2.64 atm combustion phenomenon (single frame interval 0.5 ms)

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图 6 T=931.7 K、P=8.89 atm燃烧现象(单帧间隔0.5 ms)

Figure 6. T=931.7 K, P=8.89 atm combustion phenomenon (single frame interval 0.5 ms)

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图 7 T=1383.4 K、P=2.73 atm燃烧现象(单帧间隔0.5 ms)

Figure 7. T=1383.4 K, P=2.73 atm combustion phenomenon (single frame interval 0.5 ms)

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图 8 压力对Li/SF₆点火滞燃期的影响

Figure 8. Influence of pressure on ignition delay period of Li/SF₆

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图 9 温度对Li/SF₆点火滞燃期的影响

Figure 9. Influence of temperature on ignition delay period of Li/SF₆

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图 10 Li/SF₆点火滞燃期随压力和温度变化规律

Figure 10. Changes of Li/SF₆ ignition delay period with pressure and temperature

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表 1 Li/SF₆燃烧的点火滞燃期实验工况点

Table 1. Experimental conditions of ignition delay period of Li/SF₆ combustion

序号	点火压力/atm	爆发压力/atm	点火温度/K	着火滞燃期/μs	质量/mg
1	0.85	1.91	787.8	458.60	30
2	0.87	2.46	869.8	393.10	100
3	0.89	2.14	860.2	396.80	30
4	0.91	3.20	1 355.4	209.00	30
5	0.95	2.69	1 172.2	259.80	30
6	1.00	2.62	991.5	339.2	30
7	1.02	2.69	961.4	313.90	30
8	1.16	2.74	836.2	320.40	30
9	2.19	6.52	986.7	234.20	30
10	2.73	9.81	1 383.4	106.10	30
11	2.78	8.14	921.6	201.80	100
12	3.91	9.18	935.8	179.00	30
13	4.39	8.69	945.4	162.80	30
14	5.05	7.67	935.3	131.30	30
15	8.89	13.08	931.7	111.20	30
16	10.71	24.29	937.7	92.60	30

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