Turbulent Inflow Generation for Direct Simulations of Hypersonic Turbulent Boundary Layers and Their Freestream Acoustic Radiation


Direct numerical simulations (DNS) of hypersonic turbulent boundary layers and their freestream acoustic radiation are conducted with a recycling-rescaling (RR) based or a digital-filter (DF) based turbulent inflow generation methodologies. The flow conditions of the simulations falls within the range of nozzle exit conditions of the Purdue Mach 6 Quiet Tunnel. The study provides a first ever comparison between two distinct turbulent inflow generation methodologies at a common hypersonic condition, in terms of both the turbulence statistics within the boundary layer and the acoustic pressure statistics in the free stream. The study shows that simulation results compare well downstream of the adjustment region between the RR- based and the DF-based methodologies.

Meeting Name

46th AIAA Fluid Dynamics Conference (2016: Jun. 13-17, Washington, DC)


Mechanical and Aerospace Engineering

Research Center/Lab(s)

Center for High Performance Computing Research

Keywords and Phrases

Acoustic Emissions; Acoustic Radiators; Acoustic Wave Propagation; Acoustic Wave Transmission; Acoustic Waves; Atmospheric Thermodynamics; Boundary Layer Flow; Boundary Layers; Digital Filters; Fluid Dynamics; Turbulence; Turbulent Flow; Acoustic Pressures; Acoustic Radiation; Direct Simulation; Flow Condition; Inflow-Generation; Nozzle Exits; Turbulence Statistics; Turbulent Boundary Layers; Hypersonic Boundary Layers

International Standard Book Number (ISBN)


Document Type

Article - Conference proceedings

Document Version


File Type





© 2016 American Institute of Aeronautics and Astronautics (AIAA), All rights reserved.

Publication Date

01 Jun 2016

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