Passive control of base pressure and the flow development in a duct with sudden expansion at sonic Mach number

Zuraidi, Nur Husnina Muhamad and Khan, Sher Afghan and Mohammed Sapardi, Mohd Azan and Dixit, Saurav (2024) Passive control of base pressure and the flow development in a duct with sudden expansion at sonic Mach number. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 123 (2). pp. 111-139. E-ISSN 2289-7879

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Abstract

The primary purpose of this research is to investigate the effectiveness of rib as a passive control to control the flow development around the circular duct at different levels of expansion using Computational Fluid Dynamics (CFD). The nozzle pressure ratio (NPR), rib size, and rib orientation were considered in this research. The L/D ratio is 3 to 5; the simulated NPRs were 1.5, 2, 3, 4, and 5. The rib was designed with a quarter circular shape to see the method's effectiveness. The focus was on the duct’s base pressure and wall pressure. The results show that the rib size and orientation strongly influenced the base pressure. The base pressure for the model with rib keeps increasing while the base pressure for the model with plain duct shows opposite results as the NPR increases. The base wall's pressure was not affected by nozzle pressure ratio only. Still, other characteristics, such as rib size and orientation, are significant in manipulating the result. However, the rib does not adversely impact the flow in the duct.

Item Type:	Article (Journal)
Uncontrolled Keywords:	Base pressure; passive control; Computational Fluid Dynamics (CFD)
Subjects:	T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL500 Aeronautics
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:	11 Nov 2024 17:06
Last Modified:	15 Nov 2024 09:45
URI:	http://irep.iium.edu.my/id/eprint/115745

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