Modeling of intensified heat exchange in channels with diaphragms in laminar, transitional and turbulent regions for promising heat exchangers of rocket and space technology

Objective . The aim of the study is numerical low-Reynolds modeling of heat transfer in a pipe with protrusions of semicircular transverse profiles with Reynolds criteria characteristic of laminar, transitional and turbulent flows of coolants. Method . Implemented by the method (FCOM-om) in the article, both local and integral, both stationary and non-stationary characteristics of flow and heat transfer in a pipe with internal ribs were generated in transient and laminar flow modes of the coolant, which made it possible to determine for these modes the levels of heat transfer intensification, which satisfactorily correlate with the available experimental data. Result . The successful modeling of air heat transfer in pipes with turbulators based on the low-Reynolds Mentor model at high Reynolds numbers up to one million determines the promising modeling of heat transfer in pipes with turbulators by this method and at higher Reynolds numbers. Conclusion . Therefore, the applied model adequately describes the realized phenomena of intensified heat transfer for laminar, transient and turbulent modes of coolant flows with a wide range of Prandtl numbers. The obtained patterns can be used in the engineering and scientific calculation of intensified laminar, transient and turbulent heat transfer during flow in channels with protrusions used in promising heat exchangers used, among other things, in aviation and rocket and space technology.