Base pressure control with semi-circular ribs at critical mach number

Khan, Ambareen and Khan, Sher Afghan and Akhtar, Mohammad Nishat and Aabid, Abdul and Baig, Muneer (2024) Base pressure control with semi-circular ribs at critical mach number. Fluid Dynamics & Materials Processing, 20 (9). pp. 2007-2028. ISSN 1555-2578

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Abstract

When better fuel-air mixing in the combustion chamber or a reduction in base drag is required in vehicles, rockets, and aeroplanes, the base pressure control is activated. Controlling the base pressure and drag is necessary in both scenarios. In this work, semi-circular ribs with varying diameters (2, 4, and 6 mm) positioned at six distinct positions (0.5D, 1D, 1.5D, 2D, 3D, and 4D) inside a square duct with a side of 15 mm are proposed as an efficient way to apply the passive control technique. In-depth research is done on optimizing rib size for various rib sites. According to this study, the base pressure rises as rib height increases. Furthermore, the optimal location for the semi-circular ribs with a diameter of 2 mm is at 0.5D. The 1D location also appears optimal for the 4 mm size. For the 6 mm size, however, the 4D position fills this function.

Item Type:	Article (Journal)
Uncontrolled Keywords:	Base pressure; nozzle pressure ratio; base drag; sonic Mach number; passive control
Subjects:	T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL780 Rockets
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Mechanical Engineering
Depositing User:	Prof. Dr. Sher Afghan Khan
Date Deposited:	27 Aug 2024 11:05
Last Modified:	27 Aug 2024 11:33
URI:	http://irep.iium.edu.my/id/eprint/114084

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