Numerical simulation of suddenly expanded flow at Mach 2.2

Aabid, Abdul and Khan, Ambareen and Mazlan, Nur Musfira and Ismail, Mohd Azmi and Akhtar, M. Nishat and Khan, Sher Afghan (2019) Numerical simulation of suddenly expanded flow at Mach 2.2. International journal of Engineering & Advanced Technology (IJEAT), 8 (3). pp. 457-462. ISSN 2249-8958

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Abstract

A numerical simulation has been performed to investigate the control of base pressure with microjets in a suddenly expanded duct. Microjets placed at the pitch circle diameter (PCD) of 13 mm, two micro jets of 1 mm orifice diameter located at 900 for active control. The flow Mach number of the investigation was M = 2.2, the L/D ratio of the enlarged duct considered is 6, and the area ratio is 3.24. The convergent-divergent (CD) nozzle geometry has been modeled and simulated employing K-ε turbulence model for standard wall function. From the code independently was checked with the commercial computational fluid dynamics software. The numerical simulations carried for nozzle pressure ratio’s (NPR) 3, 5, 7, 9 and 11. From the present numerical investigation, it is observed that the NPR, Mach number, and area ratio plays a vital role in fixing the base pressure values. NPR's of the present study is such that the flow mostly remained over expanded. Despite jets being over-expanded the control is effective in decreasing the base suction and hence the base drag.

Item Type:	Article (Journal)
Additional Information:	7395/71060
Uncontrolled Keywords:	M = 2.2, 3.24. 3, 5, 7, 9 and 11. NPR, Mach number
Subjects:	T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL500 Aeronautics
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:	12 Mar 2019 15:47
Last Modified:	12 Jul 2019 15:43
URI:	http://irep.iium.edu.my/id/eprint/71060

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