Numerical analysis of a microjet-based method for active flow control in convergent-divergent nozzles with a sudden expansion duct

Abid, Abdul and Khan, Sher Afghan and Baig, Muneer (2022) Numerical analysis of a microjet-based method for active flow control in convergent-divergent nozzles with a sudden expansion duct. Fluid Dynamics & Material Processing, Special Issue (1). pp. 1-24. ISSN 1555-256X E-ISSN 1555-2578

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Abstract

A method based on microjets is implemented to control the flow properties in a convergent-divergent nozzle undergoing a sudden expansion. Three different variants of this active control technique are explored numerically by means of a finite-volume method for compressible fluid flow: with the first one, the control is implemented at the base, with the second at the wall, while the third one may be regarded as a combination of the other two variants. When the jets are over-expanded, the control is not very effective. However, when a favorable pressure gradient is established at the nozzle, the control becomes effective, leading to an increase in the base pressure.

Item Type:	Article (Journal)
Uncontrolled Keywords:	Base pressure; supersonic flow; CFD; mach number; microjet control
Subjects:	N Fine Arts T Technology > TL Motor vehicles. Aeronautics. Astronautics
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:	10 Jun 2022 08:40
Last Modified:	10 Jun 2022 08:41
URI:	http://irep.iium.edu.my/id/eprint/98287

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