Effect of Chamfered Turbulators on Performance of Solar Air Heater - Numerical Study

Authors

  • Arunkumar H S Department of Mechanical and Industrial Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal - 576104, Karnataka, India
  • Madhwesh N Department of Mechanical and Industrial Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal - 576104, Karnataka, India
  • Anirudh Hegde K Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, Tehran, Iran
  • Manjunath Mallashetty Shivamallaiah Department of Mechanical and Manufacturing Engineering, Manipal Institute of Technology Bengaluru, Manipal Academy of Higher Education, Manipal, Karnataka, India
  • Kota Vasudeva Karanth Department of Mechanical and Industrial Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal - 576104, Karnataka, India
  • Younes Amini Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, Tehran, Iran

DOI:

https://doi.org/10.37934/cfdl.16.11.1736

Keywords:

Solar air heater, Turbulence, Chamfer turbulator, Thermal enhancement factor

Abstract

This paper presents a numerical analysis of the thermal performance improvement in a flat plate solar air heater equipped with chamfered turbulators attached below the absorber plate for evaluating performance for Reynolds numbers ranging from 3,000 to 21,000. According to the research, chamfered turbulators caused the flow to become highly turbulent. This flow behaviour with flow separation around the turbulators positively affects performance. This paper attempts to explain the complex flow behaviour found during the analysis. The turbulator diameter varies in 1 mm increments from 3 to 7 mm at a constant longitudinal pitch of 200 mm. The number of turbulator rows in the transverse direction is kept constant at three. The chamfer is represented by the flow attack angle, which can be 30°, 45°, or 60° facing the direction of flow and opposing the direction of flow. The results showed that a 7mm diameter turbulator with a 30° chamfer angle placed against the flow of air yielded a considerably more significant thermal enhancement factor of 1.15 over the spectrum of flow Reynolds number studied

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Author Biographies

Arunkumar H S, Department of Mechanical and Industrial Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal - 576104, Karnataka, India

arunkumar.hs@manipal.edu

Madhwesh N, Department of Mechanical and Industrial Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal - 576104, Karnataka, India

madhwesh.n@manipal.edu

Anirudh Hegde K, Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, Tehran, Iran

anirudh.k2@learner.manipal.edu

Manjunath Mallashetty Shivamallaiah, Department of Mechanical and Manufacturing Engineering, Manipal Institute of Technology Bengaluru, Manipal Academy of Higher Education, Manipal, Karnataka, India

manjunath.ms@manipal.edu

Kota Vasudeva Karanth, Department of Mechanical and Industrial Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal - 576104, Karnataka, India

kv.karanth@manipal.edu

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Published

2024-06-30

How to Cite

H S, A., N, M., Hegde K, A. ., Manjunath Mallashetty Shivamallaiah, Karanth, K. V., & Younes Amini. (2024). Effect of Chamfered Turbulators on Performance of Solar Air Heater - Numerical Study. CFD Letters, 16(11), 17–36. https://doi.org/10.37934/cfdl.16.11.1736

Issue

Vol. 16 No. 11: November (2024)

Section

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