Numerical study of laminar flow and heat transfer in square channel with 30 degrees inline angled baffle turbulators

作者：Promvonge Pongjet^*; Jedsadaratanachai Withada; Kwankaomeng Sutapat

来源：Applied Thermal Engineering, 2010, 30(11-12): 1292-1303.

DOI：10.1016/j.applthermaleng.2010.02.014

• Periodic flow
• Square channel
• Laminar flow
• Heat transfer
• Angled baffle
• Turbulator

The article presents a numerical investigation on periodic laminar flow and heat transfer behaviors in a three-dimensional isothermal wall square-channel fitted with 30 degrees-angled baffles on two opposite channel walls. The computations based on the finite volume method with the SIMPLE algorithm have been conducted for the fluid flow in terms of Reynolds numbers ranging from 100 to 2000. To generate a pair of streamwise counter-rotating vortex (P-vortex) flows through the tested channel, the angled baffles with the attack angle of 30 degrees are mounted periodically and inline arrangement on the lower and upper channel walls. Effects of different baffle heights and three pitch ratios on heat transfer and flow behaviors in the channel are examined. It appears that P-vortex flows help to induce impinging flows over the baffle leading end side and the inter-baffle cavity walls resulting in drastic increase in heat transfer rate over the test channel. The computational results reveal that the maximum thermal enhancement factors for the baffle with PR = 1, 1.5 and 2 are found to be about 3.6, 3.8 and 4.0 at BR = 0.2, 0.2 and 0.15, respectively.

• 出版日期2010-8