Experiments on mass injection-induced induced unstarting flows

Mythri, MS and Nimesh Thakor, M and Manoj Kumar, KD and Saravanan, S (2023) Experiments on mass injection-induced induced unstarting flows. In: 25th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 28 May 2023 through 1 June 2023, Bengaluru.

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Abstract

A transverse injection of nitrogen gas into a Mach 2.2 primary flow in an isolator-combustor flow path at the scramjet facility of the Indian Institute of Science is studied. The jet is sonic and is injected normally through a slot of 1mm width. The bottom and top walls are equipped with pressure sensors, and the shadowgraph technique is used to visualize the near-jet flow features. As the jet momentum flux ratio (J) increases, the bow shock gains strength and disrupts the top wall boundary layer, separating the same. This case is identified as the onset of separation. All the cases beyond this criterion are observed with an upstream propagation of the top wall separation shock. It further exhibits quasi-steady phases upon interaction with the reattachment shock and the jet. © 2023, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

Item Type:	Conference Paper
Publication:	25th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2023
Publisher:	American Institute of Aeronautics and Astronautics Inc, AIAA
Additional Information:	The copyright for this article belongs to American Institute of Aeronautics and Astronautics Inc, AIAA.
Keywords:	Flow features; Flow path; Indian institute of science; Jet momentum; Jetflows; Mass injection; Nitrogen gas; Primary flow; Shadowgraph technique; Transverse injection, Boundary layers
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	03 Oct 2024 10:18
Last Modified:	03 Oct 2024 10:18
URI:	http://eprints.iisc.ac.in/id/eprint/86437

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