Reynold's analogy for flows in diffuser-confusion channels

Annоtation: The article discusses the issues of increasing the efficiency of heat exchange devices by using channels of the diffuser-confuser type. Using the concept of Reynolds analogy, the authors of the article obtained a formula for evaluating the thermal-hydraulic efficiency of these channels. On the basis of experimental data on heat transfer and channel resistance obtained in the literature by other authors, calculations were carried out according to the proposed formula, which confirm the high efficiency of the diffuser - confuser channels with small diffuser expansion angles.