ABSTRACT

The present work reports the thermal behavior of synthetic jets (SJs) with different non-circular orifices and various waveforms such as triangular, sinusoidal, and square. Tests are conducted for the different nozzle-to-plate spacing (1–25) for a given value of Reynolds number (5380). The triangular waveform exhibits better heat transfer for all the orifice shapes. The value of maximum heat transfer for rectangular SJ is found to be 32% and 16.5% higher than isosceles and equilateral triangular SJs, respectively. The equilateral triangular SJ exhibits 12.9% higher heat transfer than the isosceles triangular SJ. The power spectral density distribution is plotted for all three waveforms.

摘要

目前的工作报告了具有不同非圆形孔口和各种波形（例如三角形、正弦曲线和方形）的合成射流（SJ）的热行为。针对给定的雷诺数 (5380) 值，对不同的喷嘴与板间距 (1-25) 进行测试。对于所有孔口形状，三角波形都表现出更好的传热效果。发现矩形 SJ 的最大传热值分别比等腰和等边三角形 SJ 高 32% 和 16.5%。等边三角形 SJ 的传热效率比等腰三角形 SJ 高 12.9%。绘制了所有三个波形的功率谱密度分布。