利用压电陶瓷改善液体燃料雾化质量的研究

The Study of Improvement of Liquid Fuel Atomization by Using Piezoelectric Ceramics

基于受激液体燃料射流破碎的线性不稳定性理论 ,探讨了将压电陶瓷材料作为激励器件应用于改善液体燃料射流雾化质量的可行性。选择锑锰酸铅 (PMS) -锆钛酸铅 (PZT)三元系压电陶瓷材料作为激励振子 ,实验证明 ,当压电振子的谐振频率等于或接近于燃料射流的特征频率 (即最大扰动增长率频率 )时 ,由压电陶瓷振子所产生具有一定振幅的剪切模式激励对液体燃料的雾化质量有显著改善。

The feasibility to improve the atomization quality of fuel jet by using the piezoelectric ceramics Pb(Mn 1/3 Sb 2/3 )O 3(PMS) Pb(ZrTi)O 3(PZT)as excitation is studied.The experiments results prove that when the resonance frequency of ceramics chip is similar to the characteristic frequency of jet system,the excitation with enough amplitude and shear mode can obviously influence the outcome of jet breakup.The results provide a new method to improve the atomization of fuel jet under relatively low injecting pressure.It's very important in many applications,such as in internal combustion engine.