Designing of Double Acting Synthetic Jet Chamber by Simulation
Date Issued
2007
Date
2007
Author(s)
Lin, Chi-Feng
DOI
zh-TW
Abstract
Light emitted diode has already been an inevitable trend to replace the cold cathode light, because of characteristics such as the low voltage of urging, no mercury, and high color reproduction. In order to reach the demand for the high intensity of illumination, we should resolve the problem of density of high fever emerging in the diode which will influence the performance of LCD system. Because LCD has limited spaces and needs low noise, “synthetic jet” is an extremely potential active heat dissipation component possessing the characteristics such as simple structure and easy control. This article proposes to design a chamber which can promote exchange rate between the central chamber and ambient. Annular chamber can induce cold fluid to central chamber because of the opposite phase between two chamber. We find that the block between central chamber and annular chamber we cut off is helpful to induce cold fluid from ambient to central chamber. That will keep the jet at low temperature during ejection every time. We also find that the vortex near the orifice of annular chamber plays an important role. The vortex can stop the fluid induce by annular chamber at pumping stroke.
Subjects
合成噴流
複動式合成噴流
數值模擬
衝擊冷卻
背光模組
發光二極體
synthetic jet
double acting
simulation
LED
backlight module
impinging cooling
moving boundary
Type
thesis
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