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Wall pressure studies in a suddenly expanded flow for area ratio 2.56”

Baig, Maugal Ahmed Ali and Khan, Sher Afghan and Rathakrishnan, E. (2012) Wall pressure studies in a suddenly expanded flow for area ratio 2.56”. International Journal of Engineering Research and Application, 2 (5). pp. 1566-1573. ISSN 2248-9622

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Abstract

This paper presents the results of an experimental work carried out to find the wall pressure distribution in a suddenly expanded duct. The enlarged duct is attached to the exit of a convergent- divergent axisymmetric nozzle. The area ratio (i.e. ratio between cross sectional area of the sudden expansion duct and the nozzle exit area) considered in the present study is 2.56. The jet entering the suddenly expanded duct is at supersonic Mach numbers regime of 1.87, 2.2 and 2.58. The length to diameter ratio considered is 10. The nozzle pressure ratio (NPR) used is 3, 5, 7, 9, and 11 for all the Mach numbers. An active control method in the form of Microjets is used to control the base pressure. The prime investigations are towards finding the effect of Microjets on wall pressure for above said parametric conditions. It is found that the duct wall pressure distribution, which usually becomes oscillatory when controls are employed, does not get adversely affected with Micro jets.

Item Type: Article (Journal)
Additional Information: 7395/49926
Uncontrolled Keywords: Wall pressure, Nozzle pressure Ratio, Supersonic Flow, Convergent-Divergent Nozzle
Subjects: T Technology > TL Motor vehicles. Aeronautics. Astronautics
T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL787 Astronautics
Kulliyyahs/Centres/Divisions/Institutes: Kulliyyah of Engineering > Department of Mechanical Engineering
Depositing User: Prof. Dr. Sher Afghan Khan
Date Deposited: 20 Apr 2016 09:45
Last Modified: 18 Jul 2016 10:24
URI: http://irep.iium.edu.my/id/eprint/49926

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