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基于Hartmann谐振腔的雾化喷嘴声场流场特性

阮灿,  黄玥,  蔡江千,  刘晨,  邢菲

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文章导航 > 航空动力学报  > 2016 >  31(9): 2104-2114
阮灿, 黄玥, 蔡江千, 刘晨, 邢菲. 基于Hartmann谐振腔的雾化喷嘴声场流场特性[J]. 航空动力学报, 2016, 31(9): 2104-2114. doi: 10.13224/j.cnki.jasp.2016.09.008
引用本文: 阮灿, 黄玥, 蔡江千, 刘晨, 邢菲. 基于Hartmann谐振腔的雾化喷嘴声场流场特性[J]. 航空动力学报, 2016, 31(9): 2104-2114. doi: 10.13224/j.cnki.jasp.2016.09.008
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RUAN Can, HUANG Yue, CAI Jiang-qian, LIU Chen, XING Fei. Aeroacoustic and flow field features of ultrasonic atomizer based on Hartmann resonance tube[J]. Journal of Aerospace Power, 2016, 31(9): 2104-2114. doi: 10.13224/j.cnki.jasp.2016.09.008
Citation: RUAN Can, HUANG Yue, CAI Jiang-qian, LIU Chen, XING Fei. Aeroacoustic and flow field features of ultrasonic atomizer based on Hartmann resonance tube[J]. Journal of Aerospace Power, 2016, 31(9): 2104-2114. doi: 10.13224/j.cnki.jasp.2016.09.008
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基于Hartmann谐振腔的雾化喷嘴声场流场特性

doi: 10.13224/j.cnki.jasp.2016.09.008

  • 厦门大学 航空航天学院, 福建 厦门 361005

基金项目: 

国家自然科学基金（51406171）；中央高校基本科研业务费（20720150180）；福建省自然科学基金（2015J05111）

详细信息
    作者简介:

    阮灿(1992-),男,湖北咸宁人,硕士生,主要研究方向为燃烧与流动控制.

    通讯作者:

    邢菲(1980-),男,辽宁锦州人,副教授,博士,主要从事燃气轮机燃烧室设计及性能优化等方面的研究.E-mail:f.xing@xmu.edu.cn

  • 中图分类号: V233.2

Aeroacoustic and flow field features of ultrasonic atomizer based on Hartmann resonance tube

  • School of Aerospace Engineering, Xiamen University, Xiamen Fujian 361005, China

    摘要
  • 摘要: 采用试验与数值模拟相结合的方法研究了谐振腔孔径、谐振腔深度、谐振腔与射流喷孔距离以及喷嘴压比（NPR）对基于Hartmann谐振腔（HRT）的气动式超声波雾化喷嘴外部流场及声场的影响.结果表明：当喷嘴压比大于2时，喷嘴压比增大对声场频率影响较小；当喷嘴压比小于2时，谐振腔依然能够产生高频声场，但其频率较高喷嘴压比时产生的小.当谐振腔深度小于1倍射流喷孔孔径时，此时高频声场主要由射流的不稳定性引发，声场频率与谐振腔深度经验关系式此时并不适用；当谐振腔孔径大于1.75倍射流喷孔孔径时，声场频率大小有降低趋势.谐振腔与射流喷孔距离与声场频率关系紧密，当谐振腔放置在自由射流压力增大区域时，才可获得理想高频声场.

     

    Abstract: Experimental and numerical studies were carried out to investigate the effects of operation parameters, such as diameter of resonance tube, resonance tube depth, jet nozzle hole to resonance tube spacing and nozzle pressure ratio(NPR), on the flow and acoustic field characteristics of a ultrasonic atomizer based on the Hartmann resonance tube(HRT). The modifications of the geometry of HRT in spectral and flow field characteristics were studied in detail. Result shows that that,when NPR is higher than 2, the increase of NPR has little effect on the frequency, however, when NPR is lower than 2, the lower frequencies of the acoustic field are obtained. The simulation results of flow field suggest that when the length of the resonance tube is smaller than diameter of jet nozzle hole, the reciprocating phenomenon of flow in the cavity is dampened, leading to a decrease of acoustic field frequency compared with cases having longer resonance tube length, and the classical relation between acoustic field frequency and tube resonance length is not appropriate for these situations. Also, the oversized diameter of resonance tube (typically,the diameter of resonance tube more than 1.75 times the diameter of jet nozzle hole) results in a lower oscillation acoustic field frequency for the interaction of the reciprocating and the shock is weakened. Furthermore, resonance occurs when the cavity is put in the regions where pressure arises for free jet.

     

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  • 收稿日期:  2016-01-18
  • 刊出日期:  2016-09-28

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