A Preliminary Study of Acoustic Prediction Technology Based on Detached Eddy Simulations for Supersonic Jets Impinging on Flat Plates

<p>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 different 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.</p>

Name thesis:degree_name

Master of Science in Aerospace Engineering

Level thesis:degree_level

Thesis - Open Access

Discipline thesis:degree_discipline

Aerospace Engineering

Year

2013

Author dc:creator

• Dewan, Yuvraj

• acoustic
• eddy
• supersonic jets
• impingement
• Aerospace Engineering

Repository record dc:identifier

https://commons.erau.edu/edt/45

OAI identifier oai:identifier

oai:commons.erau.edu:edt-1044