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Applied Mathematics and Mechanics >

2012 , Vol. 33 >Issue 12: 1481 - 1492

DOI: https://doi.org/10.1007/s10483-012-1638-x

Articles

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

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  • 1. Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, P. R. China;
    2. Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai University, Shanghai 200072, P. R. China;
    3. Modern Mechanics Division, E-Institutes of Shanghai Universities, Shanghai University, Shanghai 200072, P. R. China

Received date: 2011-02-14

  Revised date: 2012-09-21

  Online published: 2012-12-10

Supported by

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

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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.

Key words： Rattling system; non-Gaussian closure technique; chaotic stochastic Vibration; mean mapping

Cite this article

Hong-biao ZU;Zhe-wei ZHOU;Zhi-liang WANG . Properties of acoustic resonance in double-actuator ultra-sonic gas nozzle: numerical study[J]. Applied Mathematics and Mechanics, 2012 , 33(12) : 1481 -1492 . DOI: 10.1007/s10483-012-1638-x

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