Date of Award

Spring 2013

Document Type

Thesis - Open Access

Degree Name

Master of Science in Aerospace Engineering

Department

Aerospace Engineering

Committee Chair

Dr. Anastasios Lyrintzis

First Committee Member

Dr. Vladimir Golubev

Second Committee Member

Dr. Konstantin Kurbatskii

Third Committee Member

Dr. Reda Mankbadi

Abstract

An application of an existing industry tool to study supersonic jets impinging on at plates is shown. This industry tool is the commercially available CFD package ANSYS FLUENT. The supersonic jet studied is perfectly expanded with a Mach number of 1.5, and it impinges on a flat surface 4 nozzle throat diameters from the jet exit. All turbulence modeling is done using a hybrid RANS/LES technique known as Delayed Detached Eddy Simulation (DDES). A transient solution is calculated using the pressure-based coupled solver formulation with the second-order bounded central-upwind spatial discretization and second-order implicit time marching scheme. Flow features like the stagnation bubble, wall jet and feedback mechanism were studied using contour plots. An examination was also done into the mean flow fields of the jet core. The acoustics of the case were studied using two dierent techniques, direct measurement and the use of a acoustics source surface method. Using limited computational power, reasonable agreement between simulation and experimental data was found for the mean flow field and acoustics. Thus, it was demonstrated that ANSYS FLUENT can be used for this problem to provide good preliminary results in an industry setting with limited computational power.

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