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首页> 外文期刊>International Journal of Heat and Mass Transfer >Hydrodynamic cavitation and boiling in refrigerant (R-123) flow inside microchannels
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Hydrodynamic cavitation and boiling in refrigerant (R-123) flow inside microchannels

机译：微通道内部的制冷剂（R-123）中的流体动力空化和沸腾

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摘要

This research article investigates the effect that hydrodynamic cavitation has on heat transfer. The fluid medium is refrigerant R-123 flowing through 227 [an hydraulic diameter microchannels. The cavitation is instigated by the inlet orifice. Adiabatic tests were conducted to study the two-phase cavitating flow morphologies and hydrodynamic characteristics of the flow. Diabatic experiments were performed resulting in surface temperatures under heat fluxes up to 213 W/cm~2 and mass velocities from 622 kg/m~2 s to 1368 kg/ m~2 s. Results were compared to non-cavitating flows at the same mass velocities. It was found that the cavitating flows can significantly enhance the heat transfer. The heat transfer coefficient of the cavitating flows was larger than the non-cavitating flows by as much as 84%. Single-phase and two-phase heat transfer coefficients have been elucidated and employed to deduce the heat transfer mechanism prevailing under boiling conditions with and without the presence of cavitation.
机译：本文研究了水动力空化对传热的影响。流体介质是流经227 [水力直径微通道的制冷剂R-123。进气孔会引起气穴现象。进行了绝热试验以研究两相空化流的形态和流动的水动力特性。进行了绝热实验，得到的表面温度在高达213 W / cm〜2的热通量和622 kg / m〜2 s的速度下达到1368 kg / m〜2 s。将结果与相同质量流速下的非空化流进行比较。发现空化流可以显着增强热传递。空化流的传热系数比非空化流大84％。已经阐明了单相和两相传热系数，并将其用于推论在沸腾条件下存在和不存在气蚀的情况下普遍存在的传热机理。

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