Date

2022-8-25

Author

Ateş, Abdurrahman

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Cooling relatively small and powerful electronic components is a serious challenge. As the conventional methods to cool electronics became insufficient in terms of size, effectiveness, and cost; the need for smaller, quieter and cheaper systems with high cooling capacity and lower power usage resulted in the development of synthetics jets (zero net mass flux jets) that exempt the cooling system from dependency on an external fluid supply. In this study, a conceptual configuration based on the hybrid synthetic jets is discussed. The motion of the diaphragm in the proposed design is given with a sinusoidal piston movement and the time dependent simulations are conducted with two-dimensional domain. The URANS equation with transient SST k-w turbulence model is selected to solve the governing equations of the fluid dynamics and energy conservation. The effect of the proposed design is investigated in a confined channel, numerically. Up to 15% improvement on the peak local heat transfer flux is found. 26% decrease in the work input by the moving diaphragm is obtained with a 2% loss in the total heat transfer rate. The investigation shows that the suggested design satisfies the thermal requirements with remarkably less work input than the synthetic jets. A parametric study is conducted to observe the effect of different blowing ratios. Results shows the inferiority of the proposed design under the high blowing ratios compared to the conventional synthetic jets as the impinging effect of the proposed design becomes trivial.

Subject Keywords

Hybrid synthetic jet, Impingement, Heat and mass transfer, CFD

URI

https://hdl.handle.net/11511/99573

Collections

Graduate School of Natural and Applied Sciences, Thesis