Thermoacoustics and related oscillatory heat and fluid flows in micro heat exchangers
Thermoacoustics and related oscillatory heat and fluid flows in micro heat exchangers
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DOI：
10.1016/j.ijheatmasstransfer.2005.02.006
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发表时间：
2005-08
影响因子：
5.2
通讯作者：
P. Nika;Y. Bailly;F. Guermeur
中科院分区：
文献类型：
--
作者：
P. Nika;Y. Bailly;F. Guermeur
将经典的线性热声理论应用于紧凑型微型换热器，并讨论了这种计算方法应用于微尺度的有效性。给出了流体轴向速度和温度的径向分布和平均值的表达式，推导了振荡流的一阶摩擦系数和换热系数的计算公式。它示出了如何在脉冲流状态下的微型换热器的气动和热性能可以用三个因素来表征：热特征时间，传递的气动矩阵和热效率。提出的模型是专门用于设计的微型制冷机专用于电子元件的冷却微型换热器。
Classical linear thermoacoustic theory is applied to compact micro heat exchangers and the validity of such calculus applied to micro scale is discussed. Expressions for the radial profiles and average values of the fluid axial velocity and temperature are demonstrated, formulations for first order friction and heat transfer coefficients of oscillating flows are deduced. It is shown how aerodynamic and thermal performances of a micro heat exchanger in pulsed flow regime can be characterized with three factors: a thermal characteristic time, an aerodynamic matrix of transfer and a thermal efficiency. The model proposed is devoted to design the micro heat exchangers of micro refrigerators dedicated to the cooling of electronic components.