ABSTRACT

The current study investigates the distribution of local heat transfer coefficient, measurement of pressure loss and CHF in a lobed horizontal channel for flow boiling. Lobed channels with different lobed depths of 2.3, 2.0 and 1.25 mm, each having three different channel lengths (400, 600, and 1000 mm), are used for the experiments. The working substance used is R-123 with different mass flux. The heat flux range used is from 14 to 375 kW/m². Pressure drop, critical heat flux, and local heat transfer coefficients of the lobed channel are compared with corresponding smooth horizontal tubes.

中文翻译：

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R-123 水平波瓣通道内流动沸腾临界热通量、压降和传热系数的实验研究

摘要

目前的研究调查了流动沸腾的波瓣水平通道中局部传热系数的分布、压力损失和 CHF 的测量。实验中使用了具有不同波瓣深度 2.3、2.0 和 1.25 mm 的波瓣通道，每个通道具有三种不同的通道长度（400、600 和 1000 mm）。所用工质为不同质量流量的R-123。所使用的热通量范围为14至375kW/m ²。将波瓣通道的压降、临界热通量和局部传热系数与相应的光滑水平管进行了比较。