Characteristics of Flow Boiling Oscillations in Silicon Microchannel Heat Sinks
Characteristics of Flow Boiling Oscillations in Silicon Microchannel Heat Sinks
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DOI：
10.1115/1.2754946
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发表时间：
2007-10
影响因子：
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通讯作者：
R. Muwanga;I. Hassan;R. MacDonald
中科院分区：
文献类型：
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作者：
R. Muwanga;I. Hassan;R. MacDonald
研究了两种硅微通道热沉结构中的流动沸腾振荡特性。一个是具有45个直的平行通道的标准散热器，而第二个是类似的，除了在三个位置处具有交联路径。使用蒸馏水作为工作流体，在20-50 ml/min（91-228 kg/（m 2 s））的流量范围内呈现数据。热沉的基底面面积为3.5cm2，包含269 μm宽，283 μm深的反应离子蚀刻通道。流动振荡被发现是相似的两种配置之间的特征趋势，表现出随着热通量的增加而降低的频率。对于入口温度、出口温度、入口压力和压降，振荡幅度相对较大并且频率相同。在两个不同的入口温度和不同的流量的标准热沉的振荡特性相关的不同的热通量。这项工作还提出了在流动沸腾不稳定条件下的交联热沉性能的第一个一瞥。
Flow boiling oscillation characteristics in two silicon microchannel heat sink configurations are presented. One is a standard heat sink with 45 straight parallel channels, whereas the second is similar except with cross-linked paths at three locations. Data are presented over a flow range of 20-50 ml/min (91-228 kg/(m 2 s)) using distilled water as the working fluid. The heat sinks have a footprint area of 3.5 cm 2 and contain 269 μm wide by 283 μm deep reactive ion etching channels. Flow oscillations are found to be similar in characteristic trends between the two configurations, showing a decreasing frequency with increasing heat flux. The oscillation amplitudes are relatively large and identical in frequency for the inlet temperature, outlet temperature, inlet pressure, and pressure drop. Oscillation properties for the standard heat sink at two different inlet temperatures and various flow rates are correlated for different heat fluxes. This work additionally presents a first glimpse of the cross-linked heat sink performance under flow boiling instability conditions.