Experimental investigation on the flow mixing and core length of a supersonic multiple jet configuration using cross-wire as vortex generators

Faheem, Mohammed and Khan, Sher Afghan and Alam, Mohammad Mukhtar and Arputharaj, Beena Stanislaus and Hussain, Fayaz and Al-Mdallal, Qasem M. (2025) Experimental investigation on the flow mixing and core length of a supersonic multiple jet configuration using cross-wire as vortex generators. Aerospace Science and Technology, 162. pp. 1-17. ISSN 1270-9638 E-ISSN 1626-3219

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Abstract

Many Engineering applications utilize multi-jet systems, such as those found in aircraft propulsion units and spacecraft. A complex aerodynamic flow field occurs when multiple jets are close to each other. This study experimentally examines the supersonic jets’ mean flow field and mixing characteristics from one, two, and three different converging-diverging nozzles placed in close vicinity. The cross-wire is used as a passive control technique to investigate the impact of the control on the flow field and the core length. The nozzle is designed for a Mach number of M = 1.5, with an inter-nozzle positioning equal to twice the nozzle exit diameter. The typical contact procedure and the growth of the triple jet are discussed using cross-sectional contour patterns and transverse pressure profiles. The effect of leading parallel jets on local flow field features, comprising shock wave structure, supersonic core, and jet spread, is observed by measuring pressure beside the jet axes. Similarly, the flow spread rate declines when the quantity of jet flow increases; this is mainly due to a decrease in the attainability. Consequently, the jet decays more slowly, and the core length decreases. Schlieren’s pictures of triple, twin, and single jets reveal that the core of the supersonic jet varies in triple and twin jets compared to single jets.

Item Type:	Article (Journal)
Uncontrolled Keywords:	Passive control, Mean flow, Multiple-jets, Crosswire, Vortex-generators, Experimental study
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:	02 May 2025 16:18
Last Modified:	20 May 2025 16:20
URI:	http://irep.iium.edu.my/id/eprint/120769

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