Asymptotic Computational Fluid Dynamic (ACFD) Study of Three-Dimensional Turning Diffuser Performance by Varying Angle of Turn

  • Wei Xian Tham Centre for Energy and Industrial Environment Studies, Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Johor, Malaysia
  • Normayati Nordin Centre for Energy and Industrial Environment Studies, Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Johor, Malaysia
  • Azian Hariri Centre for Energy and Industrial Environment Studies, Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Johor, Malaysia
  • Nurul Fitriah Nasir Centre for Energy and Industrial Environment Studies, Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Johor, Malaysia
  • Norasikin Mat Isa Centre for Energy and Industrial Environment Studies, Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Johor, Malaysia
  • Musli Nizam Yahya
  • Suzairin Md. Seri Centre for Energy and Industrial Environment Studies, Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Johor, Malaysia
Keywords: 3-D turning diffuser, angle of turn, pressure recovery coefficient, flow uniformity, Computational Flui Dynamics (CFD), Asymptotic Computational Fluid Dynamics (ACFD)

Abstract

The present work aims to numerically investigate the effect of varying turning angle, ø = 30° - 180° on the performance of 3D turning diffuser and to develop the performance correlations via integrating the turning angle using Asymptotic Computational Fluid Dynamics (ACFD) technique. Among all the turbulence models examined, the best validated results were obtained with the Reynold Stress Model with enhanced wall treatment of =1.0 was applied for the intensive simulation. As the turning angle increased from 30˚ to 180˚, the pressure recovery was reduced by 89.3% and the flow uniformity index was raised by 27.7%. Minimal flow separation took place at 0.75 of 90˚ turning diffuser whereas maximum flow separation happened at 0.44 of 180˚ turning diffuser. The performance correlations of 3D turning diffuser as a function of geometrical and operating parameters was successfully developed using ACFD method. The ACFD results were kept within ±11.4% of deviation when compared with both CFD and experimental results.

 

 

 

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Published
06-09-2019
How to Cite
Tham, W. X., Nordin, N., Hariri, A., Nasir, N. F., Mat Isa, N., Yahya, M. N., & Md. Seri, S. (2019). Asymptotic Computational Fluid Dynamic (ACFD) Study of Three-Dimensional Turning Diffuser Performance by Varying Angle of Turn. International Journal of Integrated Engineering, 11(5), 109-118. Retrieved from https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/3957