Thermal hydraulic flow investigation and thermal performance enhancement of 3D corrugated tubes based on various geometries and DoE analyses

The present research effort to investigate the impact of different corrugated geometrics in tube on heat transfer performance characteristics and its thermal flow field pattern in order to meet the growing development needs for the design of heat exchanger configurations. Thermal power and hydraulic flow are coupled using numerical simulation calculations. Available experimental data is used to validate numerical results. Determine how altered geometric dimensions, forms, and placements affect the hydraulic flow patterns in smooth corrugated pipes and analyze and explain them. 3D computer simulations and multi-objective optimization methods are employed inside the pipe to calculate turbulence. Initially, an analysis was conducted to determine the impact of different parameters on the flow field, including the quantity of corrugated rings, the distance between them, their diameter, and their pitch. Subsequently, the Taguchi Method (TM) and Response Surface Methodology (RSM) were employed for optimization. To apply the orthogonality of his L16 sequences for the selected DOES (Design of Experiments) method, TM is carried out in accordance with the variance. Additionally, the results demonstrate that the corrugated pipe's diameter is below the larger value of the pressure differential. Consequently, the temperature differential and rate of heat transmission are most influenced by the quantity of corrugated rings. When comparing results with smooth tubes, the application of TM and RSM by Applied DoEM can enhance the temperature difference and heat transfer coefficient by approximately 45.4% and 41.2%, respectively. For corrugated pipes in different configurations, the ratio of performance evaluation factors (PEFs) is 1.5 or higher.