杜文静, 王红福, 程林. Effects of Shape and Quantity of Helical Baffle on the Shell-side Heat Transfer and Flow Performance of Heat Exchangers[J]. 中国化学工程学报(英文版), 2014,22(3):243-2511004-954160041-0.
DU Wenjing, WANG Hongfu, CHENG Lin. Effects of Shape and Quantity of Helical Baffle on the Shell-side Heat Transfer and Flow Performance of Heat Exchangers[J]. Chin.J.Chem.Eng., 2014, 22(3): 243-251.
杜文静, 王红福, 程林. Effects of Shape and Quantity of Helical Baffle on the Shell-side Heat Transfer and Flow Performance of Heat Exchangers[J]. 中国化学工程学报(英文版), 2014,22(3):243-2511004-954160041-0.DOI: 10.1016/S1004-9541(14)60041-0.
DU Wenjing, WANG Hongfu, CHENG Lin. Effects of Shape and Quantity of Helical Baffle on the Shell-side Heat Transfer and Flow Performance of Heat Exchangers[J]. Chin.J.Chem.Eng., 2014, 22(3): 243-251.DOI: 10.1016/S1004-9541(14)60041-0.
Effects of Shape and Quantity of Helical Baffle on the Shell-side Heat Transfer and Flow Performance of Heat Exchangers
Shape and quantity of helical baffles have great impact on the shell-side performance of helical baffled heat exchangers (HBHE). In this work
three physical models of HBHE with baffles of different shape (trisection
quadrant and sextant sector) were investigated. Numerical simulations were performed on HBHE at three helix angles (10°
25° and 40°) by the software ANSYS CFX. Analyses of numerical results indicate that the sextant HBHE shows relatively better fluid flow performance because the leakage flow in the triangle area is evidently reduced and the fluid streamline appears much closer to an ideal spiral flow
while the trisection and quadrant HBHE show more scattered and disordered streamline distributions. The convective heat transfer coefficient and pressure drop in three types of HBHE were presented. Further investigations on the shell side performance with different helical baffles were implemented by the field synergy theory. Both theoretical and numerical analyses gave support on the relations between helical baffle shape and shell-side performance. This paper may provide useful reference for the selection of baffle shape and quantity in HBHE.
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