旋流强度对双旋流燃烧室雾化特性影响

高亚平; 刘存喜; 郑昭卓; 梅德清; 王少林; 刘富强; 徐纲

doi:10.13224/j.cnki.jasp.20220312

旋流强度对双旋流燃烧室雾化特性影响

doi: 10.13224/j.cnki.jasp.20220312

高亚平^{1, 3,},
刘存喜^{3, 4},
郑昭卓²,
梅德清¹,
王少林^{3, 4,*, ,},
刘富强^{3, 4},
徐纲^{3, 4}

1.
江苏大学汽车与交通工程学院，江苏镇江 212013
2.
空装驻北京地区第五军事代表室，北京 101300
3.
中国科学院工程热物理研究所轻型动力重点实验室，北京 100190
4.
中国科学院大学航空宇航学院，北京 100049

基金项目: 国家科技重大专项（J2019-Ⅲ-0005-0048，2017-Ⅲ-0007-0032）

详细信息

作者简介:
高亚平（1996-），女，硕士，主要从事燃油雾化及燃烧基础研究

通讯作者:
王少林（1983-），男，助理研究员，博士，从事航空发动机燃油雾化理论与技术研究。E-mail：wangshaolin@iet.cn

中图分类号: V231.2
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- 被引次数: 0
出版历程
- 收稿日期: 2022-05-06
- 网络出版日期: 2024-08-14

Study on the effect of swirl intensity for atomization characteristics in two-stage swirl combustor

GAO Yaping^{1, 3
,},
LIU Cunxi^{3, 4},
ZHENG Zhaozhuo²,
MEI Deqing¹,
WANG Shaolin^{3, 4,*
, ,},
LIU Fuqiang^{3, 4},
XU Gang^{3, 4}

1.
School of Automotive and Traffic Engineering，Jiangsu University，Zhenjiang Jiangsu 212013，China
2.
No.5 Military Representative Office in Beijing of Military Representative Bureau of Air Force Armament Department，Beijing 101300，China
3.
Laboratory of Light-Duty Gas-Turbine，Institute of Engineering Thermophysics，Chinese Academy of Sciences，Beijing 100190，China
4.
School of Aeronautics and Astronautics，University of Chinese Academy of Sciences，Beijing 100049，China

摘要

摘要:
基于粒子图像测速法（particle image velocimetry，PIV）、平面激光散射方法（planar laser scattering，PLS）和高速喷雾粒度仪研究了不同旋流强度下预膜式空气雾化喷嘴的雾化特性，总结了燃油空间分布、喷雾锥角、液滴粒径等参数随旋流强度的变化规律。结果表明：随内级旋流强度增加，旋流器出口处气流轴向速度降低，喷雾雾锥的轴向长度、径向宽度、喷雾锥角以及液滴粒径均呈现先增加后降低的趋势；随外级旋流强度自0.695增加至0.987，中心回流区起始于轴向距离70 mm的位置。内级旋流强度较弱时，喷雾锥角随外级旋流强度增加而增加，液滴粒径随外级旋流强度增加先减小后增加；内级旋流强度较强时，喷雾锥角、液滴粒径随外级旋流强度增加而增加。研究结果解释了预膜式空气雾化喷嘴在不同旋流强度下喷雾性能的演变规律，为改善旋流燃烧室雾化性能提供理论支撑。
- 旋流强度 /
- 燃油分布 /
- 喷雾锥角 /
- 液滴粒径 /
- 预膜式空气雾化喷嘴 /
- 光学诊断测量
Abstract:
Based on particle image velocimetry (PIV), plane laser scattering (PLS) and high speed granulometer, the atomization characteristics of prefilming air-blast atomizer under different swirl intensities were studied. The variation laws of fuel spatial distribution, spray cone angle and fuel particle size with swirl intensity were summarized. It was found that with the increase of the S_ni, the axial velocity of the airflow at the outlet of the swirler decreased. Meanwhile, the axial length and radial width of the spray cone increased first and then decreased, and the spray cone angle and droplet diameter also showed the same trend. The central recirculation zone occurred within the S_no range from 0.695 to 0.987, whose starting position was X=70 mm. When the S_ni was weak, the spray cone angle increased with the increase of S_no, and the droplet diameter decreased first and then increased with the increase of S_no. When S_ni was strong, spray cone angle and droplet diameter were positively correlated with S_no. The results showed that the evolution law of spray characteristics of prefilming air-blast atomizer under different swirl intensities was explained, which could provide a theoretical support for improving atomization performance of swirl combustor.
- swirl intensity /
- fuel distribution /
- spray cone angel /
- droplet diameter /
- prefilming air-blast atomizer /
- optical diagnostic measurement

HTML

图 1 预燃级结构示意图

Figure 1. Schematic diagram of pilot stage structure

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图 2 雾化特性试验系统

Figure 2. Experimental system for atomization characteristics

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图 3 液滴粒径测量系统

Figure 3. Droplet size measurement system

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图 4 S_no=0.695时内级旋流强度对流场的影响

Figure 4. Effect of inner swirl intensity on flow field when S_no=0.695

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图 5 S_ni=0.427时外级旋流强度对流场的影响

Figure 5. Effect of outer swirl intensity on flow field when S_ni=0.427

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图 6 S_no=0.695时内级旋流强度对燃油分布的影响

Figure 6. Effect of inner swirl intensity on fuel distribution when S_no=0.695

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图 7 S_no=0.695时内级旋流强度对喷雾雾锥的影响

Figure 7. Effect of parameters of inner swirler on the profile of spray cone when S_no=0.695

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图 8 外级旋流参数对燃油分布的影响

Figure 8. Effect of outer swirl intensity on fuel distribution

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图 9 内级旋流强度保持不变时外级旋流参数对喷雾雾锥的影响

Figure 9. Effect of outer swirl intensity on spray cone when inner swirl intensity is constant

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图 10 不同旋流强度下的喷雾锥角

Figure 10. Spray cone angle under different swirl intensities

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图 11 S_no=0.695时不同内级旋流强度下的SMD

Figure 11. SMD under different inner swirl intensities when S_no=0.695

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图 12 内级旋流强度保持不变时SMD随外级旋流参数的变化趋势

Figure 12. SMD under different outer swirl intensities when inner swirl intensity is constant

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表 1 预燃级参数设计

Table 1. Parameter design of pilot stage

方案编号	内级叶片角度θ_s1/（°）	内级叶片数目n	外级叶片角度θ_s2/（°）	内旋流数S_ni	外旋流数S_no
S1	−20	6	+40	0.235	0.695
S2	−20	8	+40	0.266	0.695
S3	−30	8	+40	0.427	0.695
S4	−20	6	+45	0.235	0.828
S5	−20	6	+50	0.235	0.987
S6	−30	8	+50	0.427	0.987
S7	−30	8	+55	0.427	1.183
S8	−30	8	+60	0.427	1.434

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