Characterization of Acoustic Excited Power Resonance Tube for On-board Piezoelectric Generator
For the frequency impact factors of acoustic oscillation of on-board piezoelectric generator,a numerical investigation of acoustic excited powered resonance tube was carried out to gain a better understanding of and the effect of different parameters on the unsteady flow characteristics.The acoustic excited power resonance tube used in this work consisted of an annular nozzle and an open-closed cylindrical resonance tube.Computational results for pressure fluctuations and the corresponding power spectra level(PSL)are presented for resonance tube length,separation distance between the resonance tube and the annular nozzle and inlet velocity.The results illustrate a reduction in frequency and amplitude of pressure oscillations with increase in L consistent with previous theoretical studies of quarter wave frequency.A reduction in fluctuations frequency and amplitude is predicted with increase in X from 2 mm to 6 mm,whereas the difference of frequency is 10%between X= 2 mm and 6 mm.On the other hand no oscillations were predicted for X=8 mm.An increase in fluctuations frequency and amplitude is predicted with increase in V from 60 to 100 m/s,whereas the difference of frequency is 5%between V=60 m/s and V=100 m/s.From aforementioned results,it can be seen that frequency of pressure oscillations is mainly dependent on resonance tube length.In addition,separation distance and inlet velocity have little influence on the frequency.The conclusions provide references for the future design and experimental study of the generator.
On-board Piezoelectric Generator Acoustic Excited Power Resonance Tube Frequency Impact Factors Numerical Investigation
Huajie ZOU Hejuan CHEN Xiaoguang HU
School of Mechanical Engineering,Nanjing University of Science & Technology,Jiangsu Nanjing,210094,P.R.China
国际会议
The 5th International Conference on Mechanical Engineering and Mechanics(第五届国际机械工程与力学会议)
江苏扬州
英文
589-594
2014-08-21（万方平台首次上网日期，不代表论文的发表时间）