Dual Synthetic Jets Actuator and Its Applications—Part III: Impingement Flow Field and Cooling Characteristics of Vectoring Dual Synthetic Jets
Dual Synthetic Jets Actuator and Its Applications—Part III: Impingement Flow Field and Cooling Characteristics of Vectoring Dual Synthetic Jets
复制标题
双合成射流执行器及其应用——第三部分：矢量双合成射流冲击流场及冷却特性
作者：
邓雄;董昭峰;刘强;彭灿;何伟;罗振兵
为了了解矢量双合成射流（DSJ）的冲击流场和冷却特性，进行了实验研究，分析了参数对冲击流场的影响。随着槽位位置的变化，DSJ的矢量角度可以从向左的34.5°调整到向右的29.5°。矢量函数可以极大地扩展撞击区域的长度。局部冷却性能（Nu）和整体冷却性能（Nuavg）存在三个局部峰值。虽然滑块某一位置的峰值Nu高于中心，但相应的Nuavg较低。对于不同的驱动频率，在350 Hz时矢量角最小，为9.7°，但Nu有明显提高。Nuavg值在350 Hz处有一个局部峰值，而不是在250 Hz和450 Hz处有三个局部峰值。250hz和450hz的Nuavg达到最大值的槽位位置不同。当驱动电压从±100 V增加到±200 V时，矢量角从46.9°下降到22.2°，但Nu和Nuavg均有所提高。各驱动电压的最大Nuavg出现在滑块的中心位置。节流效应和横流对矢量角和撞击式DSJ的冷却性能起主导作用。矢量化DSJ将推动空间约束下大面积电气器件的热管理和消除动态热点。
In order to understand the impingement flow field and cooling characteristics of vectoring dual synthetic jets (DSJ), an experimental investigation was performed to analyze the parameter effects. With the variation of the slot location, the vectoring angle of DSJ can be adjusted from 34.5° toward the left to 29.5° toward the right. The vectoring function can greatly extend the length of impingement region. There are three local peaks both for the local cooling performance (Nu) and the whole cooling performance (Nuavg). Although the peak Nu at a certain location of the slider is higher than that at the center, the corresponding Nuavg is lower. As for different driving frequencies, the vectoring angle reaches its minimum of 9.7° at 350 Hz, but the Nu is obviously improved. There is one local peak of Nuavg values at 350 Hz rather than three local peaks at 250 Hz and 450 Hz. The slot locations where the Nuavg of 250 Hz and 450 Hz reach maximum are different. With the increase in driving voltage from ±100 V to ±200 V, the vectoring angle drops from 46.9° to 22.2°, but both Nu and Nuavg are improved. The maximum Nuavg of each driving voltage occurs at the center location of the slider. The choking effect and the cross flow have dominated the vectoring angle and the cooling performance of impingement DSJ. Vectoring DSJ will give impetus to the thermal management of large-area electric devices in spaced-constrained cooling and removing dynamic hotspots.
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影响因子：
1.9
作者：
Zhen-bing Luo;Z. Xia
通讯作者：
Zhen-bing Luo;Z. Xia
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DOI：
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发表时间：
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影响因子：
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影响因子：
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作者：
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通讯作者：
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DOI：
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发表时间：
2022-05
影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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