利用合成冲击射流实现电子冷却

The efficiency and mechanisms of coo领 a constant heat flux surface by impinging synthetic jets were investigated experimentally and compared to coo领 with continuous jets. Effects of jet formation frequency and Reynolds number at different nozzle-to-surface distances (H/d) were investigated. High formation frequency (f = 1200 Hz) synthetic jets were found to remove heat better than low frequency (f = 420 Hz) jets for small H/d, while low frequency jets are more effective at larger H/d. Moreover, synthetic jets are about three times more effective in coo领 than continuous jets at the same Reynolds number. Using PIV, it was shown that the higher formation frequency jets are associated with breakdown and merging of vortices before they impinge on the surface. For the lower frequency jets, the wavelength between coherent structures is larger such that vortex rings impinge on the surface separately. KEYWORDS: 德国LaVision PIV/PLIF粒子成像测速场仪 Imager sCMOS PIV相机 用于粒子成像测速(PIV)的荧光示踪粒子