旋流式气泡雾化喷嘴喷雾特性实验研究

赵芳; 徐兵兵; 符澄; 王越; 张海洋

doi:10.11729/syltlx20210026

旋流式气泡雾化喷嘴喷雾特性实验研究

doi: 10.11729/syltlx20210026

赵芳^{1, 2,},
徐兵兵^{1, 2},
符澄^{1, 2},
王越³,
张海洋^{1, 2, ,}

1.
中国空气动力研究与发展中心空气动力学国家重点实验室，绵阳　621000
2.
中国空气动力研究与发展中心设备设计与测试技术研究所，绵阳　621000
3.
河北工业大学能源与环境工程学院，天津　300401

详细信息

作者简介:
赵芳：（1988—），男，湖南衡阳人，硕士，副研究员。研究方向：燃气发生器设计与实验，风洞及相关设备设计与实验。通信地址：四川省绵阳市涪城区二环路南段6号12信箱1分箱（621000）。E-mail：zfcardc@163.com

通讯作者:
E-mail：21482724@qq.com

中图分类号: O321；TK313
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- 文章访问数: 746
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出版历程
- 收稿日期: 2021-04-01
- 修回日期: 2021-06-18
- 录用日期: 2021-07-05
- 网络出版日期: 2022-02-17
- 刊出日期: 2022-12-30

Experimental study on the characteristics of swirl effervescent atomizer

ZHAO Fang^{1, 2
,},
XU Bingbing^{1, 2},
FU Cheng^{1, 2},
WANG Yue³,
ZHANG Haiyang^{1, 2
, ,}

1.
State Key Laboratory of Aerodynamics, China Aerodynamics Research and Development Center, Mianyang　621000, China
2.
Facility Design and instrumentation institute, China Aerodynamics Research and Development Center, Mianyang　621000, China
3.
School of Energy and Environment Engineering, Hebei University of Technology, Tianjin　300401, China

摘要

摘要: 与常规压力雾化、气动雾化相比，气泡雾化具有高效、经济和环保等优点。针对一种可变喷头旋流式气泡雾化喷嘴进行了实验研究，探讨了工作参数、喷嘴孔型、切割丝网目数（孔径）等因素对喷嘴流量、喷雾特性的影响规律。研究结果表明：不同孔型喷嘴的流量特性趋势基本一致；相同工作压力下，气液比不同会导致喷嘴流量的变化；安装切割丝网基本不影响喷嘴的流量特性趋势，但在相同工况下会造成喷嘴流量减小3%～7%，且丝网孔径越小，减小幅度越大；喷雾液滴粒径分布呈单峰形式，且随着工作压力或气液比的增大，喷雾液滴的中位粒径会有不同程度的减小；相同喷雾能耗下，异形（方形、椭圆形）喷孔更有助于提高喷雾性能；丝网有利于提高喷嘴雾化性能，但需综合考虑喷嘴孔型、工作压力等因素选择丝网孔径；此外，安装切割丝网会在一定程度上降低喷雾主流轴向速度。
- 可变喷头 /
- 旋流 /
- 气泡雾化喷嘴 /
- 孔型 /
- 切割丝网 /
- 气液比
Abstract: Compared with the conventional pressure atomization and pneumatic atomization, effervescent atomization has the advantages of high efficiency, economy and environmental protection, which has attracted the attention of various fields. In this paper, a series of experiments were carried out on a variable nozzle internal swirling effervescent atomizer, and the effects of the working parameters, hole structure and mesh number on the flow and spray characteristics were discussed. The results show that flow characteristics of the atomizer with different hole structures are basically the same. The change of the air-liquid ratio results in the change of the liquid mass flow rate under the same working pressure. Flow characteristics are not affected by the cutting screen, while the addition of the cutting screen induces 3%–7% attenuation of the spay mass flow rate of under the same working condition, and the smaller the cutting screen aperture is, the greater the reduction of the spray mass flow rate is. The distribution of spray particles presents a single peak structure, and the median mean diameter of the spray decreases with the increase of the working pressure or air-liquid ratio. Under the same spray energy consumption, the special-shaped hole structure is more helpful to improve the spray performance. The cutting screen is beneficial to the spray performance, but the choice of the mesh aperture should be made based on the atomizer structure, the working pressure and other comprehensive judgment; in addition, the addition of the cutting screen reduces the axial velocity of the spray mainstream to a great extent.
- variable nozzle /
- internal swirling /
- effervescent atomizer /
- hole structure /
- cutting screen /
- air-liquid ratio

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图 1 实验系统简图

Figure 1. Schematic diagram of spray test system

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图 2 喷嘴结构图

Figure 2. Structure diagram of effervescent atomizer

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图 3 丝网结构

Figure 3. Structure diagram of wire mesh

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图 4 圆孔喷嘴的流量特性

Figure 4. Flow characteristics of circular hole atomizer

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图 5 方孔喷嘴的流量特性

Figure 5. Flow characteristics of square hole atomizer

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图 6 椭圆孔喷嘴的流量特性

Figure 6. Flow characteristics of elliptical hole atomizer

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图 7 不同孔型喷嘴流量系数曲线对比

Figure 7. Flow coefficient comparison of atomizer with different hole structures

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图 8 安装80目切割丝网后圆孔喷嘴的流量特性

Figure 8. Flow characteristics of atomizer with 80 mesh cutting screen

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图 9 不同目数切割丝网对圆孔喷嘴流量特性的影响

Figure 9. Flow characteristics comparison of atomizer with different hole structure cutting screen meshes

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图 10 不同孔型喷嘴喷雾锥角对比

Figure 10. Spray cone angle comparison of atomizer with different hole structures

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图 11 圆孔喷嘴喷雾液滴中位粒径随气液比的变化

Figure 11. D₅₀ curves of circular hole atomizer with gas-liquid ratio

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图 12 喷雾液滴粒径分布

Figure 12. Distribution of spray particles

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图 13 不同孔型喷嘴喷雾液滴粒径分布

Figure 13. Distribution of spray particles comparison of atomizer with different hole structures

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图 14 切割丝网目数对喷雾液滴中位粒径的影响

Figure 14. Influence curves of cutting screen on D₅₀

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图 15 切割丝网对喷雾主流轴向速度的影响

Figure 15. Influence curves of cutting screen on spray axial velocity

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表 1 实验参数表

Table 1. Experimental parameters

参数	数值（编号）
工作压力p/MPa	0.2、0.3、0.4、0.5、0.6
气液比	0.10～0.35
孔型	Case 1、Case 2、Case 3
切割丝网目数	0、50、80、100（0表示未安装丝网，其他对应丝网孔径分别为0.27、0.18和0.15 mm）

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表 2 不同孔型喷嘴的喷雾液滴中位粒径

Table 2. D₅₀ of atomizer with various hole structures

喷嘴编号	D₅₀/μm
Case 1	22.94
Case 2	14.92
Case 3	19.97

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