Plasma kernel model and energy transformation characteristic of plasma synthetic jet actuator
Plasma kernel model and energy transformation characteristic of plasma synthetic jet actuator
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DOI：
10.1063/5.0125089
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发表时间：
2022-12
影响因子：
4.6
通讯作者：
Xiuxiu Chen;Zhengzhong Sun
中科院分区：
文献类型：
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作者：
Xiuxiu Chen;Zhengzhong Sun
本文通过理论、实验和数值研究，阐明了等离子体合成射流致动器（PSJA）的等离子核模型和能量转换特性。利用等离子体核理论和冲击波理论描述了电弧放电能量沉积过程的形成和演化过程，建立了等离子体核模型。纹影实验可视化了合成射流的形成和演化过程，并以此作为数值模拟的验证。为研究不同腔体体积（128 ~ 512 mm3）和放电能量（2.8 ~ 11.3 mJ）的等离子体合成射流致动器的能量转换特性，对其进行了数值模拟。结果表明，等离子体核半径和形成时间可以用比沉积能量进行理论预测，与模拟结果吻合较好。还可以计算出腔内的峰值压力和温升。动能所占比例随无因次沉积能量线性增加，而势能随无因次空腔体积和沉积能量呈相反趋势。
This article conducted a theoretical, experimental, and numerical investigation to clarify the plasma kernel model and energy transformation characteristics of the plasma synthetic jet actuator (PSJA). Plasma kernel and blast wave theory were used to describe the formation and evolution of the arc-discharge energy deposition process and build a plasma kernel model. Schlieren experiment visualized the formation and evolution of the synthetic jet flow and used it as a validation of the numerical simulation. Five plasma synthetic jet actuators with different cavity volumes (128–512 mm3) and different discharge energy (2.8–11.3 mJ) were modeled numerically to investigate the energy transformation characteristic of PSJA. Results showed that plasma kernel radius and formation time could be theoretically predicted with specific deposition energy and correspond well with simulation results. The peak pressure and temperature rise in the cavity can also be calculated. Moreover, the proportion of kinetic energy increases linearly with non-dimensional deposition energy, while potential energy has a reverse tendency with non-dimensional cavity volume and deposition energy.