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压电风扇主要包括由压电材料制作的驱动器和振动薄片,驱动器激励振动薄片振动进而产生气流流动,是一种新型的散热装置。研究多种参数对压电风扇性能的影响,为压电风扇的设计提供指导性的意见和建议。使用计算流体方法,模拟压电风扇流场的发展过程,研究了压电风扇振动薄片的振型、双振动薄片的排布形式以及在每种排布形式下两振动薄片振动相位差等因素对出口风速的影响。得到以下结论:驱动器的激振频率应等于振动薄片的一阶固有频率;双振动薄片模型,两振动薄片的最佳振动相位差分别是π(纵向布置)和0.8π(横向布置)。通过分析流场发展过程,给出了参数影响的成因。
Piezoelectric fans mainly consist of a driver made of piezoelectric material and a vibrating sheet. The driver vibrates the vibrating sheet to generate airflow, which is a new type of heat sink. The effects of various parameters on the performance of the piezoelectric fan are studied to provide guidance and suggestions for the design of the piezoelectric fan. The computational fluid method is used to simulate the development of piezoelectric fan flow field. The vibration mode of piezoelectric fan vibration plate, the arrangement of double vibration plate and the phase difference between two vibration plates in each arrangement are studied The impact of export wind speed. The following conclusions are obtained: the excitation frequency of the actuator should be equal to the first-order natural frequency of the vibration sheet; in the dual-vibration sheet model, the optimal vibrational phase differences of the two vibration sheets are π (longitudinal arrangement) and 0.8π (lateral arrangement), respectively. By analyzing the flow field development process, the causes of the influence of parameters are given.