Analysis of Base Pressure Control with Ribs at Mach 1.2 using CFD Method

Authors

  • Ahmad ‘Afy Ahmad Fakhruddin Department of Mechanical & Aerospace Engineering, Faculty of Engineering, IIUM, Gombak Campus, Kuala Lumpur, Malaysia
  • Fharukh Ahmed Ghasi Mahaboobali Government Engineering College Gangavathi Koppal, District Karnataka - 583 227, India
  • Ambareen Khan Department of Aerospace Engineering, School of Engineering, USM, Penang, Malaysia
  • Mohammad Nishat Akhtar Department of Aerospace Engineering, School of Engineering, USM, Penang, Malaysia
  • Sher Afghan Khan Department of Mechanical & Aerospace Engineering, Faculty of Engineering, IIUM, Gombak Campus, Kuala Lumpur, Malaysia
  • Khizar Ahmad Pathan Department of Mechanical Engineering, CSMSS Chh. Shahu College of Engineering, Aurangabad, 431011, India

DOI:

https://doi.org/10.37934/arfmts.123.1.108143

Keywords:

Supersonic, base pressure, Mach, ribs, passive control

Abstract

This paper discusses the control of base pressure by passive means, where the jet is issued from a converging nozzle at sonic Mach number under a favorable pressure gradient. The effect of employing annular ribs on the enlarged duct and its impact on the flow field, as the passive control mechanism from a converging nozzle at the sonic Mach number, is investigated numerically in this study. The velocity distribution and base pressure changes are analyzed using a numerical compressible turbulence flow model. Initially, the rib is positioned at 16 mm (1D) from the base of the duct. Later, the rib position is shifted from 1D to 2D and then to 3D and 4D. The effect of variation of the rib positions, as well as its height from 1 mm to 3 mm, keeping the width of the rib fixed to 3 mm, is studied. The nozzle pressure ratio varies from 1.5 to 5, and the rib location is 1D and 2D. The velocity variation in the duct with and without rib placement is also analyzed. The results revealed comprehensive spread observations from the positive analysis of base pressure variation in ducts with no ribs and ribs with heights of 1 mm and 2 mm. The base pressure increased significantly with increasing nozzle pressure ratio for both rib heights compared to a smooth duct. It is also deduced that the highest base pressure is achieved at an aspect ratio of 3:1 when placed at 4D.

Downloads

Download data is not yet available.

Author Biographies

Ahmad ‘Afy Ahmad Fakhruddin, Department of Mechanical & Aerospace Engineering, Faculty of Engineering, IIUM, Gombak Campus, Kuala Lumpur, Malaysia

ahmadafiy12@gmail.com

Fharukh Ahmed Ghasi Mahaboobali, Government Engineering College Gangavathi Koppal, District Karnataka - 583 227, India

fharukh@gmail.com

Ambareen Khan, Department of Aerospace Engineering, School of Engineering, USM, Penang, Malaysia

khanambareen5@gmail.com

Mohammad Nishat Akhtar, Department of Aerospace Engineering, School of Engineering, USM, Penang, Malaysia

nishat.akhtar2000@gmail.com

Sher Afghan Khan, Department of Mechanical & Aerospace Engineering, Faculty of Engineering, IIUM, Gombak Campus, Kuala Lumpur, Malaysia

sakhan@iium.edu.my

Khizar Ahmad Pathan, Department of Mechanical Engineering, CSMSS Chh. Shahu College of Engineering, Aurangabad, 431011, India

kn.pathan@gmail.com

Downloads

Published

2024-10-30

How to Cite

Ahmad Fakhruddin, A. ‘Afy ., Ghasi Mahaboobali, F. A. ., Khan, A. ., Akhtar, M. N. ., Khan, S. A., & Pathan, K. A. . (2024). Analysis of Base Pressure Control with Ribs at Mach 1.2 using CFD Method. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 123(1), 108–143. https://doi.org/10.37934/arfmts.123.1.108143

Issue

Section

Articles

Most read articles by the same author(s)