Thermal–Hydraulic Performance Improvement in 3D Pipes: A Parametric Study Employing Various Interrupted Geometries of Passive Methods
摘要
This study presents a prototype featuring tape inserts, dimples, and corrugated rings, designed to enhance thermal performance within pipe systems. The central component of the prototype is a tape insert, complemented by strategically placed dimples and corrugated rings distributed along the pipe’s inner surface. To evaluate the characteristics of fluid flow and heat transfer capabilities of this design, both experimental investigations and computational fluid dynamics (CFD) were conducted. Under constant heat flux boundary conditions, comprehensive simulations were performed in the thermal entrance region, assuming a turbulent flow regime with varying Reynolds numbers (Re). The numerical findings demonstrate excellent consistency with experimental data, exhibiting deviations of ± 6.2% for Nu and ± 6.8% for the friction factor. These geometric inserts yield a significant enhancement in overall heat transfer, with an improvement ratio reaching up to 1.8. Notably, the inserts induce a swirl flow pattern within the pipe, characterized by the formation of vortex pairs along the flanks of the tape. This phenomenon enhances the thermal efficiency of heat transfer within the pipe. Through systematic parametric analyses, the influence of the geometrical parameters—specifically the width and amplitude of the dimples and corrugations on performance of thermal–hydraulic in pipe was thoroughly examined. The results indicate that the thermal performance deteriorates as Re rises. Conversely, augmenting dimensions of dimples and optimizing the corrugation profiles lead to improved thermal efficiency. This research underscores of proposed design to significantly enhance heat performance in piping systems, paving way for the development of advanced heat exchangers tailored to diverse engineering applications. By demonstrating the efficacy of these innovative inserts, this study contributes to the ongoing advancement of high-performance thermal systems.