多孔介质-文丘里气泡发生器产气特性实验研究

doi:10.11949/0438-1157.20240317

化工学报

• •

多孔介质-文丘里气泡发生器产气特性实验研究

蔡伟华¹^,⁴(), 王玉航¹^,⁵, 张文超¹^,²(), 李少丹³, 刘鑫龙¹, 蔡本安¹(), 王金成¹

^1.东北电力大学能源与动力工程学院热流科学与核工程实验室，吉林吉林 132012
^2.清华大学先进堆工程与安全教育部重点实验室，北京 100084
^3.武汉第二船舶设计研究院，湖北武汉 430205
^4.华东交通大学土木工程与建筑学院，江西南昌 330013
^5.中国石油大庆油田有限责任公司，黑龙江大庆 163453

收稿日期:2024-03-20 修回日期:2024-05-09 出版日期:2024-07-02
通讯作者: 张文超,蔡本安
作者简介:蔡伟华（1982—），男，博士，教授，caiwh@neepu.edu.cn
基金资助:
国家自然科学基金青年基金项目(52206194);先进堆工程与安全教育部重点实验室项目(ARES-2023-09);吉林省教育厅科学研究计划项目(JJKH20240158KJ)

Experimental study of gas production characteristics of a porous media-Venturi bubble generator

Weihua CAI¹^,⁴(), Yuhang WANG¹^,⁵, Wenchao ZHANG¹^,²(), Shaodan LI³, Xinlong LIU¹, Ben'an CAI¹(), Jincheng WANG¹

^1.Laboratory of Thermo-fluid Science and Nuclear Engineering, School of Energy and Power Engineering, Northeast Electric Power University, Jilin 132012, Jilin, China
^2.Key Laboratory of Advanced Reactor Engineering and Safety, Ministry of Education, Tsinghua University, Beijing, 100084, China
^3.Wuhan Second Ship Design and Research Institute, Wuhan 430205, Hubei, China
^4.School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, Jiangxi, China
^5.PetroChina Daqing Oilfield Limited Company, Daqing 163453, Heilongjiang, China

Received:2024-03-20 Revised:2024-05-09 Online:2024-07-02
Contact: Wenchao ZHANG, Ben'an CAI

摘要/Abstract

摘要：

将多孔介质发泡技术与文丘里气泡发生器相结合，开发多孔介质-文丘里气泡发生器。以去离子水和空气为工质，进行产气特性可视化实验研究。拍摄观察区域内气泡行为，分析多孔介质-文丘里气泡发生器产气规律，讨论水流量和气流量的影响规律。实验结果表明，与传统文丘里气泡发生器相比，在相同入口Reynolds数下，多孔介质-文丘里气泡发生器产生的气泡Sauter平均直径缩小了25.3%-47.4%，标准差缩小范围为24.4%-62.2%，说明改进的气泡发生器气泡Sauter平均直径更小，气泡粒径更均匀。水流量由5m³/h增大到15m³/h，多孔介质-文丘里气泡发生器产生的气泡Sauter平均直径由892μm减小至293μm，标准差由317μm减小至85μm；气流量由0.3L/min增大到1.8L/min，多孔介质-文丘里气泡发生器产生的气泡Sauter平均直径由328μm增大到482μm。说明水流量增大或气流量减小时，气泡发生器产生的气泡平均直径变小，气泡粒径分布更均匀。相关研究成果为文丘里气泡发生器的优化提供了一种思路。

关键词: 多孔介质, 文丘里管, 气泡, 气液两相流

Abstract:

Combine the porous media foaming technology with the Venturi bubble generator to develop a porous media-Venturi bubble generator. Using deionized water and air as the work material, the experimental study on visualization of gas production characteristics is carried out. Photographs to observe the bubble behavior in the region, analyze the porous media-Venturi bubble generator gas production law, discuss the influence of water flow and air flow law. The experimental results show that, compared with the traditional Venturi bubble generator, under the same inlet Reynolds number, the average diameter of bubble sot produced by the porous media- Venturi bubble generator was reduced by 25.3%-47.4%, and the standard deviation was reduced in the range of 24.4%-62.2%, which indicates that the Sauter average diameter of bubble produced by the improved bubble generator is smaller, and the particle size of bubbles is more uniform. The water flow rate increased from 5m³/h to 15m³/h, the Sauter average diameter of bubble produced by the porous media-Venturi bubble generator decreased from 892μm to 293μm, and the standard deviation decreased from 317μm to 85μm; the gas flow rate increased from 0.3L/min to 1.8L/min, the Sauter average diameter of bubble produced by the porous media-Venturi bubble generator increased from 328μm to 482μm, indicating that the Sauter average diameter of bubbles produced by the bubble generator became smaller and the particle size distribution of bubbles was more uniform when the water flow rate was increased or the gas flow rate was decreased. The related research results provide an idea for the optimization of the Venturi bubble generator.

Key words: porous media, Venturi, bubble, gas-liquid flow

中图分类号:

蔡伟华, 王玉航, 张文超, 李少丹, 刘鑫龙, 蔡本安, 王金成. 多孔介质-文丘里气泡发生器产气特性实验研究[J]. 化工学报, DOI: 10.11949/0438-1157.20240317.

Weihua CAI, Yuhang WANG, Wenchao ZHANG, Shaodan LI, Xinlong LIU, Ben'an CAI, Jincheng WANG. Experimental study of gas production characteristics of a porous media-Venturi bubble generator[J]. CIESC Journal, DOI: 10.11949/0438-1157.20240317.

图/表 18

图1 多孔介质-文丘里气泡发生器

Fig.1 Schematic diagram of porous media-Venturi bubble generator

图2 进气管部分结构图

Fig.2 Dimensional drawing of intake pipe section

图3 传统文丘里气泡发生器结构图

Fig.3 Structural diagram of traditional Venturi bubble generator

图4 实验系统图

Fig.4 Experimental system diagram

表1 仪表及数据采集精度

Table 1 Instrumentation and data acquisition accuracy

测量仪表	量程	精度	数据采集精度
涡轮流量计	2~20m³/h	1%	0.1%
气体流量计	0~2L/min	1.5%	0.1%
压力表1	0~0.6MPa	0.25%	0.1%
压力表2	-0.1~0.6MPa	0.25%	0.1%
压力表3	0~0.6MPa	0.25%	0.1%

图5 选取气泡样本示意图

Fig.5 Schematic diagram of selecting bubble samples

图6 气泡处理流程图

Fig.6 Bubble processing flowchart

表2 多孔介质-文丘里气泡发生器实验工况

Table 2 Experimental conditions of porous media Venturi bubble generator

工况	气流量(L/min)	液体流量(m³/h)	含气率(%)
1	1.00	5.01	1.20
2	1.00	7.51	0.80
3	1.00	10.00	0.60
4	1.00	12.47	0.48
5	1.00	14.98	0.40
6	0.30	10.11	0.18
7	0.60	10.03	0.36
8	0.90	10.01	0.54
9	1.20	10.00	0.72
10	1.49	10.01	0.89
11	1.79	10.02	1.07

图7 扩散段气泡行为

Fig.7 Bubble behavior in the diffusion section

图8 两种气泡发生器观察段对比（水流量为7.5m3/h，气流量为1L/min）

Fig.8 Comparison of observation sections for two types of bubble generators (water flow rate of 7.5m3/h, gas flow rate of 1L/min)

图9 两种气泡发生器产生的气泡数密度随水流量变化

Fig.9 Variation of bubble number density with water flow rate for two types of bubble generators

图10 不同水流量下两种文丘里气泡发生器气泡直径分布

Fig.10 Distribution of bubble diameter in two types of Venturi bubble generators under different water flow rates

图11 不同水流量下气泡Sauter平均直径及其标准差分布

Fig.11 Distribution of average bubble diameter and standard deviation under different water flow rates

图12 不同水流量下气泡发生器后段压降变化

Fig.12 Pressure drop variation in the rear section of the bubble generator under different water flow rates

图13 两种文丘里气泡发生器在不同气流量下气泡直径分布

Fig.13 Distribution of bubble diameters of two types of Venturi bubble generators at different air flow rates

图14 水流量为10m3/h，不同气流量下气泡Sauter平均直径及其标准差分布

Fig.14 Distribution of mean bubble diameter and its standard deviation at different air flow rates for a water flow rate of 10m3/h

图15 不同气流量下气泡发生器后段压降变化

Fig.15 Variation of pressure drop in the rear section of the bubble generator for different gas flow rates

图16 预测值与实验值对比

Fig.16 Comparison of predicted and experimental values

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多孔介质-文丘里气泡发生器产气特性实验研究

Experimental study of gas production characteristics of a porous media-Venturi bubble generator

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