Effect of Expansion Level and Relief to Shear Layer in a Suddenly Expanded Flow: A CFD Approach

Authors

  • Ridwan Department of Mechanical and Aerospace Engineering, International Islamic University Malaysia, PO Box 10, Kuala Lumpur 50728, Malaysia
  • Muhammed Ammar Rusydi Rosnin Department of Mechanical and Aerospace Engineering, International Islamic University Malaysia, PO Box 10, Kuala Lumpur 50728, Malaysia
  • Abdul Aabid Department of Engineering Management, College of Engineering, Prince Sultan University, Riyadh, 11586, Saudi Arabia
  • Sher Afghan Khan Department of Mechanical and Aerospace Engineering, International Islamic University Malaysia, PO Box 10, Kuala Lumpur 50728, Malaysia
  • Jaffar Syed Mohamed Ali Department of Mechanical and Aerospace Engineering, International Islamic University Malaysia, PO Box 10, Kuala Lumpur 50728, Malaysia
  • Mohd. Azan Mohammed Sapardi Department of Mechanical and Aerospace Engineering, International Islamic University Malaysia, PO Box 10, Kuala Lumpur 50728, Malaysia

DOI:

https://doi.org/10.37934/arfmts.100.3.202229

Keywords:

Flow control, supersonic flow, NPR, base pressure, CD nozzle

Abstract

Computational Fluid Dynamics analysis was used to study the effect of expansion level in a suddenly expanded flow for a converging-diverging nozzle expanded to the duct of larger diameter at supersonic Mach number. Parameters include the nozzle pressure ratio (NPR), L/D ratio, and area ratio. The model of the converging-diverging (C-D) nozzle suddenly expanding into the enlarged duct with the cavity was created using the Design Modeler of ANSYS Fluent. The Mach number of the study is 1.6. The area ratio varied from 2.25 to 5.29, and the L/D ranged from 1 to 10. The simulated nozzle pressure ratio (NPR) ranged from 2, 3, 4.25, and 6.375. The outcome demonstrated that the geometric alteration and NPR strongly affect the base pressure. The ambient pressure influences result in lower L/Ds. The cavity of aspect ratio 1 is most effective in raising the base pressure. Increasing the width does not yield any desirable results. However, the location of the cavity played a very significant role in base pressure regulation. The duct's wall pressure and the flow field remained identical with and without control.

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Author Biographies

Ridwan, Department of Mechanical and Aerospace Engineering, International Islamic University Malaysia, PO Box 10, Kuala Lumpur 50728, Malaysia

ridwan@live.iium.edu.my

Muhammed Ammar Rusydi Rosnin, Department of Mechanical and Aerospace Engineering, International Islamic University Malaysia, PO Box 10, Kuala Lumpur 50728, Malaysia

mammar@live.iium.edu.my

Abdul Aabid, Department of Engineering Management, College of Engineering, Prince Sultan University, Riyadh, 11586, Saudi Arabia

aabidhussain.ae@gmail.com

Sher Afghan Khan, Department of Mechanical and Aerospace Engineering, International Islamic University Malaysia, PO Box 10, Kuala Lumpur 50728, Malaysia

sakhan@iium.edu.my

Jaffar Syed Mohamed Ali, Department of Mechanical and Aerospace Engineering, International Islamic University Malaysia, PO Box 10, Kuala Lumpur 50728, Malaysia

jaffar@iium.edu.my

Mohd. Azan Mohammed Sapardi, Department of Mechanical and Aerospace Engineering, International Islamic University Malaysia, PO Box 10, Kuala Lumpur 50728, Malaysia

azan@iium.edu.my

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Published

2022-11-15

How to Cite

Ridwan, Rosnin, M. A. R., Abdul Aabid, Khan, S. A., Mohamed Ali, J. S., & Mohammed Sapardi, M. A. (2022). Effect of Expansion Level and Relief to Shear Layer in a Suddenly Expanded Flow: A CFD Approach. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 100(3), 202–229. https://doi.org/10.37934/arfmts.100.3.202229

Issue

Vol. 100 No. 3: December (2022)

Section

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