Hand-generated piezoelectric mechanical-to-electrical energy conversion plasma
Hand-generated piezoelectric mechanical-to-electrical energy conversion plasma
复制标题
DOI：
10.1063/5.0018967
复制
发表时间：
2020-09
影响因子：
4
通讯作者：
Olivia K. Jaenicke;Federico G. Hita Martínez;Jinyu Yang;S. Im;D. Go
中科院分区：
文献类型：
--
作者：
Olivia K. Jaenicke;Federico G. Hita Martínez;Jinyu Yang;S. Im;D. Go
瞬态火花放电是一种大气压等离子体，其在污染物去除、医学、水处理、农业、杀菌剂和纳米材料合成中具有应用。在大气压力下产生瞬态火花的传统方法通常需要纳秒脉冲的高电压输入。压电晶体提供了一条创建等离子体设备的途径，这些设备不需要高压电源来产生高压输出;它们直接将机械能转化为电能。本文研究了一种手动操作的压电式机械-电能转换等离子体装置。该装置产生的等离子体放电的电气特性表明，其表现为瞬态火花，在约30 ns内放电0.96 mJ，在多次连续放电中具有一致的行为。尽管该特定装置具有1.54%的低机械-等离子体能量转换效率，但压电晶体在大约8 μs后重置到平衡状态，这表明它可以在高达近125 kHz的机械输入下操作。这项工作显示了在离网情况下使用压电晶体产生等离子体的潜力。压电等离子体装置的一个特定应用是用于原位污染减轻或等离子体增强燃烧，将这种装置嵌入内燃机和涡轮机的高频振荡或旋转部件上。
A transient spark discharge is an atmospheric pressure plasma that has applications in pollutant removal, medicine, water treatment, agriculture, bactericides, and nanomaterial synthesis. Conventional methods of generating transient sparks at atmospheric pressure usually require a high voltage input at nanosecond pulses. Piezoelectric crystals offer a path to creating plasma devices that do not require a high voltage power supply to generate high voltage outputs; they directly transform mechanical energy into electrical energy. This work examines a manually-operated piezoelectric mechanical-to-electrical energy conversion plasma device. Electrical characterization of the plasma discharge generated by this device shows that it behaves as a transient spark, discharging 0.96 mJ over approximately 30 ns, with consistent behavior across multiple consecutive discharges. Although this specific device had a low mechanical-to-plasma energy conversion efficiency of 1.54%, the piezoelectric crystal resets to an equilibrium condition after approximately 8 μs, which suggests that it could be operated with a mechanical input of up to nearly 125 kHz. This work shows the potential of generating plasma in off-the-grid situations using piezoelectric crystals. One particular application of a piezoelectric plasma device is for in situ pollution mitigation or plasma-enhanced combustion, embedding such a device on the high-frequency oscillating or rotating components of internal combustion engines and turbomachinery.