Open Access
ARTICLE
INFLUENCES OF THE PUNCHED DELTA WINGLET VORTEX GENERATORS IN A CIRCULAR TUBE HEAT EXCHANGER ON THERMO-HYDRAULIC PERFORMANCE
Withada Jedsadaratanachaia, Amnart Boonloib,*
Fluid Dynamics Division, School of Advanced Sciences, VIT University, Vellore, TN, 632014, India
* Corresponding Author: Email:
Frontiers in Heat and Mass Transfer 2015, 6, 1-19. https://doi.org/10.5098/hmt.6.13
Abstract
Numerical investigations on flow topology, heat transfer behavior and thermal performance evaluation in a circular tube heat exchanger with the
punched delta winglet vortex generators (PDWVG) inserted in the middle of the test section are presented. The effects of the flow attack angles that
converging to the center of the tube;
α = 0°, 5°, 10°, 15°, 20°, 25°, and flow directions; winglet tips pointing downstream and upstream, are
investigated for the Reynolds numbers;
Re = 100 – 2000. The finite volume method and SIMPLE algorithm are used for the current study. The results
are presented in terms of flow configuration, heat transfer behavior and thermal performance assessments and also compared with the smooth tube
with no
PDWVG. As numerical results, the use of
PDWVG inserted in the tube can help to improve heat transfer rate and thermal performance in the
heat exchanger by creating the vortex flows through the test section. The rise of the flow attack angle and Reynolds number leads to increase in heat
transfer, friction loss and thermal performance. The optimum
TEF is around 2.33 at
Re = 2000,
α = 25° for winglet tip pointing downstream.
Keywords
Cite This Article
Jedsadaratanachai, W., Boonloi, A. (2015). INFLUENCES OF THE PUNCHED DELTA WINGLET VORTEX GENERATORS IN A CIRCULAR TUBE HEAT EXCHANGER ON THERMO-HYDRAULIC PERFORMANCE.
Frontiers in Heat and Mass Transfer, 6(1), 1–19. https://doi.org/10.5098/hmt.6.13