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Penetration Characteristics of Air, Carbon Dioxide and Helium Transverse Sonic Jets in Mach 5 Cross Flow

Erdem, Erinc and Kontis, Konstantinos and Saravanan, Selvaraj (2014) Penetration Characteristics of Air, Carbon Dioxide and Helium Transverse Sonic Jets in Mach 5 Cross Flow. In: SENSORS, 14 (12). pp. 23462-23489.

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Official URL: http://dx.doi.org/10.3390/s141223462

Abstract

An experimental investigation of sonic air, CO2 and Helium transverse jets in Mach 5 cross flow was carried out over a flat plate. The jet to freestream momentum flux ratio, J, was kept the same for all gases. The unsteady flow topology was examined using high speed schlieren visualisation and PIV. Schlieren visualisation provided information regarding oscillating jet shear layer structures and bow shock, Mach disc and barrel shocks. Two-component PIV measurements at the centreline, provided information regarding jet penetration trajectories. Barrel shocks and Mach disc forming the jet boundary were visualised/quantified also jet penetration boundaries were determined. Even though J is kept the same for all gases, the penetration patterns were found to be remarkably different both at the nearfield and the farfield. Air and CO2 jet resulted similar nearfield and farfield penetration pattern whereas Helium jet spread minimal in the nearfield.

Item Type: Journal Article
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Additional Information: Copyright for this article belongs to the MDPI AG, POSTFACH, CH-4005 BASEL, SWITZERLAND
Keywords: Flows and jets through nozzles; velocity measurements; visualization and imaging
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 14 Feb 2015 13:36
Last Modified: 14 Feb 2015 13:36
URI: http://eprints.iisc.ernet.in/id/eprint/50824

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