双激励超音速气体雾化喷嘴共振特性的数值研究

祖洪彪; 周哲玮; 王志亮

doi:10.3879/j.issn.1000-0887.2012.12.001

双激励超音速气体雾化喷嘴共振特性的数值研究

doi: 10.3879/j.issn.1000-0887.2012.12.001

上海大学上海市应用数学和力学研究所, 上海市力学在能源工程中的应用重点实验室, 上海 200072

基金项目: 国家自然科学基金资助项目(10772107;10702038;11172163)；上海市教委科研创新资助项目(08YZ10)；上海市科委资助项目(09DZ1141502)；上海高校创新团队建设项目

详细信息

作者简介:
祖洪彪(1985—),河北人,硕士;王志亮(1974—), 湖北人,博士(联系人. E-mail:wng-zh@shu.edu.cn).

中图分类号: O354.2
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出版历程
- 收稿日期: 2011-02-14
- 修回日期: 2012-09-21
- 刊出日期: 2012-12-15

Properties of acoustic resonance in double-actuator ultra-sonic gas nozzle: numerical study

Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, P. R. China

Funds: Project supported by the National Natural Science Foundation of China (Nos. 10772107, 10702038, and 11172163), the E-Institutes of Shanghai Municipal Education Commission, and the Shanghai Program for Innovative Research Team in Universities

摘要

摘要: 超音速气体雾化(ultra-sonic gas atomization, USGA))喷嘴是实现喷射雾化的重要装置，它能够产生脉动的超音速气流，获得较小的平均粒径和集中的粒径分布．在USGA喷嘴的共振管端部引入了主动的激励信号，组成双激励式超音速气体雾化器，并对超音速气体雾化器内部Hartmann腔体气体流场在无激励/有激励情况下所产生的气体振动特性进行了数值研究．结果表明在主动激励器的作用下，超音速气体雾化器内气流的振动效果如振幅和起振特性等都得到了有效的加强．研究发现超音速气体雾化器存在多个气体受激振动的共振频率，其对应于两类不同的共振模式，“Hartmann模式”和“全局模式”．双激励器信号的频率、激励幅度及相位差改变都能够有效地改变超音速气流的振动特性．研究同时阐明了Hartmann共振管和二次共振管在USGA喷嘴腔体内产生气体脉动时的联动特点．
- 喷射雾化 /
- 超音速气体雾化喷嘴 /
- 共振 /
- 数值模拟
Abstract: The ultra-sonic gas atomization (USGA) nozzle is an important apparatus in the metal liquid air-blast atomization process. It can generate oscillating supersonic gas efflux, which is proved to be effective to enforce the atomization and produce narrow-band particle distributions. A double-actuator ultra-sonic gas nozzle is proposed in the present paper by joining up two active signals at the ends of the resonance tubes. Numerical sim-ulations are adopted to study the effects of the flow development on the acoustic resonant properties inside the Hartmann resonance cavity with/without actuators. Comparisons show that the strength and the onset process of oscillation are enhanced remarkably with the actuators. The multiple oscillating amplitude peaks are found on the response curves, and two kinds of typical behaviors, i.e., the Hartmann mode and the global mode, are discussed for the corresponding frequencies. The results for two driving actuators are also investigated. When the amplitudes, the frequencies, or the phase difference of the input signals of the actuators are changed, the oscillating amplitudes of gas efflux can be altered effectively.
- spray atomization /
- ultra-sonic gas nozzle /
- resonance /
- numerical simulation

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参考文献(17)

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