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Numerical simulation (CFD) to explore optimal vortex generator array configurations in air cooled condensers.

Number: pap. 2555

Author(s) : WONG Y. M., HARDY G. D., JACOBI A. M., et al.

Summary

This study presents a numerical analysis of laminar convective heat transfer in a rectangular channel with an array of delta-winglet vortex generators (VG) and with one straight line of multiple VGs. A loi and high Reynolds number case of 225 and 1123 is simulated which is representative of the lower and upper limits of the air velocity range in a typical air cooled condenser (ACC) system. The effects of interacting and non-interacting vortices on the Nusselt number and pressure drop are observed for the two Reynolds numbers. The low Re cases flow cleaner through the channel, pressure drop is slightly lower for the array in comparison to the straight line formation for two VG pairs, however the increase in Nusselt number is higher in the straight line configuration. For the high Re cases the vortices generated are stronger and persist longer and interactions between vortices in the array configuration lead to Nusselt number increase but a higher pressure drop increase. The straight line configuration has almost equal increase in Nusselt number and pressure drop.

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Pages: 10 p.

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Details

  • Original title: Numerical simulation (CFD) to explore optimal vortex generator array configurations in air cooled condensers.
  • Record ID : 30018751
  • Languages: English
  • Source: 2016 Purdue Conferences. 16th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2016/07/11

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