کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
655438 | 1457641 | 2013 | 16 صفحه PDF | دانلود رایگان |
In the present paper, an attempt was undertaken to model the propagation of a pressure wave triggered by periodic hydrodynamic instabilities in the condensation of the R404A and R134a refrigerants in pipe mini-channels. A homogenous transient two-fluid model was used based on balance equations. The model presents the complexity of multi-phase flows. The heat exchange between the phases in the condensation process was calculated using the one-dimensional form of Fourier’s equation. The dependence which defines the interfacial the drag forces for the flow in mini-channels was also taken into consideration. The results of the numerical calculations were verified with experimental investigations and satisfactory compliance was obtained.
► Studied the pressure wave propagation velocity during condensation of refrigerants R134a and R404A.
► Condensation process occurred in minichannels.
► In the calculations used two-phase flow model.
► Having regard to relevant flow regime obtained satisfactory agreement with experimental results of computational.
Journal: International Journal of Heat and Fluid Flow - Volume 40, April 2013, Pages 135–150