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Numerical simulations of a CD nozzle and the influence of the duct length

Akhtar, Mohammad Nishat and Abu Bakar, Elmi and Aabid, Abdul and Khan, Sher Afghan (2019) Numerical simulations of a CD nozzle and the influence of the duct length. International Journal of Innovative Technology and Exploring Engineering (IJITEE), 8 (9S2). pp. 622-630. ISSN 2278-3075

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Abstract

A numerical method is used to observe the effect of microjets control on wall pressure spreading in sudden expansion two-dimensional planar duct. In order to find the microjet effectiveness 2-jets of 1 mm diameter orifice located precisely at 900 of intervals along a pitch-circle-distance (PCD) of 1.3 times the exit diameter of the nozzle in the base were employed to control actively. At the present study, the Mach number was used to calibrate the entry to duct was 2.2, and the area ratio of 2.56. The focus in this study and investigate the influence of length-to-diameter ratio (L/D) of a suddenly expanded duct and its effect on the development of the flow field. Hence, to achieve this, the duct length has been varied from 2 to 10. Nozzles are producing such Mach numbers the experiments were performed operating at nozzle pressure ratio (NPR) 3, 5, 7, 9, and 11. The convergent-divergent nozzle geometry has been studied using the K-ε standard wall function turbulence model and independently check with the ANSYS software.

Item Type: Article (Journal)
Additional Information: 7396/74733
Uncontrolled Keywords: Nozzle, Area ratio, Nozzle pressure ratio, Microjet, Flow Control, ANSYS simulation, CFD.
Subjects: T Technology > T Technology (General)
T Technology > TL Motor vehicles. Aeronautics. Astronautics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering > Department of Mechanical Engineering
Kulliyyah of Engineering
Depositing User: Prof. Dr. Sher Afghan Khan
Date Deposited: 01 Oct 2019 10:34
Last Modified: 01 Oct 2019 10:34
URI: http://irep.iium.edu.my/id/eprint/74733

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