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

作　　者：祖洪彪 周哲玮 王志亮 

机构地区：[1]Shanghai Institute of Applied Mathematics and Mechanics,Shanghai University [2]Shanghai Key Laboratory of Mechanics in Energy Engineering,Shanghai University [3]Modern Mechanics Division,E-Institutes of Shanghai Universities,Shanghai University

出　　处：《Applied Mathematics and Mechanics(English Edition)》2012年第12期1481-1492,共12页应用数学和力学（英文版）

基　　金：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：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 effiux, 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 axe adopted to study the effects of the flow development on the acoustic resonant properties inside the Haxtmann 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 effiux can be altered effectively.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 effiux, 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 axe adopted to study the effects of the flow development on the acoustic resonant properties inside the Haxtmann 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 effiux can be altered effectively.

关 键 词：spray atomization ultra-sonic gas nozzle resonance numerical simulation 

分 类 号：TB559[理学—物理]