Hypersonic Nozzle Characterisation Using CFD

Webb, Alister (2020) Hypersonic Nozzle Characterisation Using CFD. [USQ Project]

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Abstract

The University of Southern Queensland Hypersonic Testing Facility (TUSQ) is used for experimentation involving supersonic and hypersonic aerodynamics. TUSQ has four available nozzles which are designed to produce different flow regimes, they are Mach 2, Mach 4.5, Mach 6, and Mach 7. The facility can produce almost constant stagnation conditions at the nozzle inlet, with stagnation pressure and temperature ranging up to 7MPa and 1100K respectively. As the most frequently used stagnation pressure is 1MPa, flows produced by this stagnation condition are consequently well documented and very well understood.

This project aims to perform CFD simulations of TUSQ using the compressible flow solver Eilmer4 in order to improve the current understanding of the range of its capabilities. A 2D axisymmetric CFD model of TUSQ’s Mach 6 nozzle and test section was created, and simulated for the nominal stagnation condition of 1MPa at 575K. The results were then compared to experimental and theoretical data documented by Birch (2019) and Buttsworth (2010). The Mach 6 nozzle simulation was validated, and found to produce results in the core flow that deviated by less than 1% compared to the experimental and theoretical data.

Further simulations were run for different stagnation conditions for both the Mach 6 nozzle, and the Mach 7 nozzle. The stagnation conditions used for both nozzles included; 4MPa at 575K, and 7MPa at 575K, with 1MPa at 900K also run for the Mach 6 nozzle. The results showed that increasing the stagnation pressure subsequently increased the static pressure in the test section, as well as the pitot pressure, and Reynolds number. It also produced a larger expansion at the nozzle exit. The 1MPa 900K simulation was found to increase the size of the usable area adjacent to the nozzle exit. The usable area has very little local variation in flow parameters and is suitable for use for experimentation.


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Item Type: USQ Project
Item Status: Live Archive
Additional Information: Bachelor of Engineering (Mechanical)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 Jul 2013 -)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 Jul 2013 -)
Supervisors: Zander, Fabian
Date Deposited: 09 Aug 2021 01:58
Last Modified: 10 Aug 2021 05:43
Uncontrolled Keywords: supersonic aerodynamics, hypersonic aerodynamics, CFD, compressible flow solver, Eilmer4, University of Southern Queensland Hypersonic Testing Facility (TUSQ)
URI: http://eprints.usq.edu.au/id/eprint/43020

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