制作了四种带有圆柱形内肋阵列的硅基微通道,以去离子水为工质对其内部流动和换热特性进行了实验研究,并平直微通道进行了对比,分析了内肋阵列微通道中流动阻力提升和强化换热的机理.研究表明:内肋阵列带来较大阻力的同时也极大地改善了换热;流体流经内肋阵列微通道时,其阻力在低Re数下主要来自壁面效应产生的摩擦阻力,高Re数下则受绕肋产生尾涡的影响较大;不同内肋布置方式对流体流动和换热影响显著,叉排布置比顺排布置的内肋阵列微通道具有更大的摩擦因子和换热系数,且增大垂直于流动方向内肋密度更有利于增强换热;内肋排列最为紧密的微通道社2综合换热性能最好,相同泵功下,其换热热阻相对于平直微通道降低了53.4％.
参考文献
| [1] | Weilin Qu;Gh. Mohiuddin Mala;Dongqing Li .Heat transfer for water flow in trapezoidal silicon microchannels[J].International Journal of Heat and Mass Transfer,2000(21):3925-3936. |
| [2] | H.Y. Wu;Ping Cheng .An experimental study of convective heat transfer in silicon microchannels with different surface conditions[J].International Journal of Heat and Mass Transfer,2003(14):2547-2556. |
| [3] | 唐慧敏,吴慧英,吴信宇.锯齿形硅基微通道内流动与换热特性实验[J].航空动力学报,2010(06):1264-1270. |
| [4] | Ali Kosar;Chandan Mishra;Yoav Peles .Laminar Flow Across a Bank of Low Aspect Ratio Micro Pin Fins[J].Journal of Fluids Engineering: Transactions of the ASME,2005(3):419-430. |
| [5] | Yoav Peles;Ali Kosar;Chandan Mishra;Chih-Jung Kuo;Brandon Schneider .Forced convective heat transfer across a pin fin micro heat sink[J].International Journal of Heat and Mass Transfer,2005(17):3615-3627. |
| [6] | Ali Kosar;Yoav Peles .Thermal-Hydraulic Performance of MEMS-based Pin Fin Heat Sink[J].Journal of heat transfer: Transactions of the ASME,2006(2):121-131. |
| [7] | Ravi S. Prasher;John Dirner;Je-Young Chang;Alan Myers;David Chau;Dongming He;Suzana Prstic .Nusselt Number and Friction Factor of Staggered Arrays of Low Aspect Ratio Micropin-Fins Under Cross Flow for Water as Fluid[J].Journal of heat transfer: Transactions of the ASME,2007(2):141-153. |
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