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首页> 外文会议>American Society of Mechanical Engineers(ASME) Summer Heat Transfer Conference(HT2005); 20050717-22; San Francisco,CA(UA) >ELECTRONIC COOLING USING SYNTHETIC JETS
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ELECTRONIC COOLING USING SYNTHETIC JETS

机译：使用合成喷嘴进行电子冷却

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摘要

Efficiency of synthetic jet impingement cooling and the mechanisms of heat removal from a constant heat flux surface were investigated experimentally. The effects of jet's formation frequency and Reynolds number at different nozzle-to-surface distances were investigated and compared to steady jet cooling. It was found that synthetic jets are up to three times more effective than steady jets at the same Reynolds number. For smaller distances, high formation frequency (f = 1200 Hz) synthetic jets remove heat better than low frequency (f= 420 Hz) jets, whereas low frequency jets are more effective at larger distances, with an overlapping region. Using PIV, it was shown that at small distances between the synthetic jet and the heated surface, the higher formation frequency jet is associated with accumulation of vortices before they impinge on the surface. For the lower frequency jet, the wavelength between coherent structures is so large that vortex rings impinge on the surface separately.
机译：实验研究了合成射流冲击冷却的效率以及从恒定热通量表面去除热量的机理。研究了射流形成频率和雷诺数在不同喷嘴到表面距离下的影响，并将其与稳定射流冷却进行了比较。发现在相同雷诺数下，合成射流的效率比稳定射流高三倍。对于较小的距离，高地层频率（f = 1200 Hz）的合成射流比低频（f = 420 Hz）的射流散热更好，而低频射流在较大距离下具有重叠区域更有效。使用PIV，结果表明，在合成射流和受热表面之间的距离很小的情况下，较高的形成频率射流与旋涡撞击到表面之前的积累有关。对于较低频率的射流，相干结构之间的波长非常大，以至于涡流环分别撞击在表面上。

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