An experimental investigation on the thermal behavior of synthetic jets involving non-circular orifices with varying wave patterns

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.

Automated summary

This study investigates the thermal behavior of synthetic jets (SJs) with different non-circular orifices and waveforms (triangular, sinusoidal, and square). Tests were conducted for various nozzle-to-plate spacing (1-25) at a constant Reynolds number (5380). The triangular waveform showed better heat transfer performance compared to other orifice shapes. The rectangular SJ exhibited 32% and 16.5% higher heat transfer than the isosceles and equilateral triangular SJs, respectively. The equilateral triangular SJ showed 12.9% higher heat transfer than the isosceles triangular SJ. Power spectral density distribution was plotted for all three waveforms.