Synthetic jet potentially useful in electronics cooling is investigated both numerically and experimentally. In the present study, a confined three dimensional synthetic jet with sinusoidal moving wall is considered. Computations are carried out using the FLUENT software with the coupled user defined function (UDF) describing the diaphragm movement. In this study the effect of various geometrical parameters influencing the flow field and heat transfer are investigated. The effects of change in orifice geometry (circular and rectangular), orifice aspect ratio and jet-to-plate distance are studied for a given hydraulic diameter. An electromagnetic actuator is used as an oscillating diaphragm for the generation of synthetic jet. A stainless steel (SS) foil (AISI-304) with 0.05 mm thickness is used as the test specimen. It is heated by DC power source (APLAB, L-3260). The surface temperature of the test specimen is measured by using a thermal imaging technique (FLIR-A655Sc) during synthetic jet impingement. Tests are carried out for Reynolds number (Re = 5448), different values of jet-to-plate distance (z/d = 1- 18), for a given hydraulic diameter of the orifice. The heat transfer results obtained from the synthetic jet is compared with the continuous jet. The maximum value of the heat transfer coefficient is found to be 16.1 times more than the heat transfer coefficient for natural convection.


Experimental and Numerical Investigation of Thermal Performance of Synthetic Jet Impingement

Division / Sponsors: 
Power Division & Nuclear Engineering Division (NED)

Power Conference
Paper Proceedings: https://asmedigitalcollection.asme.org/POWER/POWER2020/volume/83747

International Conference on Nuclear Engineering
Paper Proceedings: https://asmedigitalcollection.asme.org/ICONE/ICONE2020/volume/83761

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