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Experimental investigation on fluid mechanics of micro-channel heat transfer devices

机译:微通道传热装置流体力学的实验研究

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摘要

The future technological horizons for engineering applications (Automotive, Energy, Bio-Engineering) require the use of limited size heat exchangers with high efficiency. In the present work, the flow field in small scale channels of different geometries is investigated experimentally using mu PIV (micro Particle Image Velocimetry) and thermal measurements. The Reynolds number in the channels is changed as also the wall temperature, in order to investigate and improve the thermal efficiency at different flow rates, temperatures and geometrical configurations. The main result of this investigation is that a serpentine cell attains the highest efficiency regardless of flow regime, getting high Nusselt numbers combined with low pressure losses, as derived by the observation of quite high local velocities and few recirculation regions.
机译:未来的工程应用技术视野(汽车,能源,生物工程)要求使用具有高效率的有限尺寸的热交换器。 在本作工作中,通过MU PIV(微颗粒图像速度计量)和热测量来实验研究了不同几何形状的小规模信道中的流场。 通道中的雷诺数变为壁温,以便在不同的流速,温度和几何配置下进行研究和提高热效率。 本研究的主要结果是,无论流动方案,蛇形细胞是否达到最高效率,以获得高压损耗的高露珠,通过观察相当高的局部速度和少量再循环区域来源。

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