The Effect of Ventilation Hole Number on Flow Behavior and Heat Transfer of Rotary Drum Dryer

Authors

  • Sherly Hanifarianty Energy Technology program, Faculty of Engineering, Prince of Songkla University, 90112 Hatyai, Songkhla, Thailand
  • Thanansak Theppaya Energy Technology program, Faculty of Engineering, Prince of Songkla University, 90112 Hatyai, Songkhla, Thailand
  • Chayut Nuntadusit Department of Mechanical Engineering, Faculty of Engineering, Prince of Songkla University, 90112 Hatyai, Songkhla, Thailand
  • Makatar Wae‐Hayee Energy Technology Research Center, Faculty of Engineering, Prince of Songkla University, 90112 Hatyai, Songkhla, Thailand

Keywords:

rotary dryer, CFD, heat transfer, ventilation hole, flow behavior

Abstract

The effect of ventilation holes on flow behavior and heat transfer of rotary drum dryer  were  studied  by  using  Computational  Fluid  Dynamics  (CFD).  In  the  experimental  apparatus, the drum was heated by direct burning with flame from LPG at the bottom  surface  of  the  drum. In  steady  state  condition,  the  temperature  distribution  on  the  surface of the drum was detected by using infrared camera. The average temperature  on the cap surface was 80oC, the drum surface was 130oC, and the temperature inside  rotary drum was 120oC. In order to maintain the air temperature inside the drum at 120oC, the number of ventilation holes was varied by using CFD. In the 3D numerical  model of  the drum including ambient air was simulated in transient. The ventilation  holes were  drilled  on  the  drum  caps, and  the  number  of  the  hole  on each  cap was  varied at 6, 8, 12, and 18 holes. The results showed that the air temperature inside the  drum at the condition of ?12 holes was the highest with the shortest time. The longest  time of 1,400 seconds and 1,600 seconds were observed to be uniform temperature  and uniform velocity flow in this research. 

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Published

2020-12-01

How to Cite

Hanifarianty, S. ., Theppaya, T. ., Nuntadusit, C. ., & Wae‐Hayee, M. . (2020). The Effect of Ventilation Hole Number on Flow Behavior and Heat Transfer of Rotary Drum Dryer. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 46(1), 62–72. Retrieved from https://www.akademiabaru.com/submit/index.php/arfmts/article/view/2203

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