To solve the heat dissipation problem of electronic equipment, a novel spray cooling device based on a dual synthetic jet actuator integrated with a piezoelectric atomizer (DSJAPA) is proposed and designed. The flow field, spray characteristics and cooling performance of DSJAPA are investigated experimentally. The experimental results show that the spray angle increases with the increase of driving voltage, and it can achieve the maximum of 74°. Under a certain driving voltage, there exists an optimum driving frequency making the spray angle reach to the maximum. The spray flow field is investigated by droplet image velocimetry (PIV) system. The results show that the spray droplet velocity can be accelerated to about 22.5 m/s by the high-speed ejection of the jet. With the increase of dual synthetic jet velocity, the dense spray with low velocity changes into the dilute spray with high velocity. A dual synthetic jet actuator can improve the cooling capability of spray, reduce the temperature non-uniformity of surface (from 32 °C in spray cooling to 18 °C in DSJAPA cooling) and enlarges the direct impingement range (from (−30 mm, 25 mm) in spray cooling to (−60 mm, 57 mm) in DSJAPA cooling).

中文翻译：

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基于与压电雾化器集成的双合成射流致动器的新型喷雾冷却装置

为了解决电子设备的散热问题，提出并设计了一种基于双合成射流致动器和压电雾化器（DSJAPA）的新型喷雾冷却装置。实验研究了DSJAPA的流场，喷雾特性和冷却性能。实验结果表明，喷雾角随驱动电压的增加而增大，最大可达到74°。在一定的驱动电压下，存在最佳的驱动频率，使喷雾角达到最大。通过液滴图像测速（PIV）系统研究喷雾流场。结果表明，通过高速射流的喷射，雾滴速度可加速至约2​​2.5 m / s。随着双重合成射流速度的增加，低速的浓雾变成高速的稀雾。双合成喷射执行器可以提高喷雾的冷却能力，减少表面温度不均匀性（从喷雾冷却的32°C到DSJAPA冷却的18°C），并扩大直接冲击范围（从（−30 mm， 25毫米）的喷雾冷却至（DSJAPA冷却的（-60毫米，57毫米））。