Aero-optical Distortions Of Turbulent Boundary Layers: Hypersonic Dns
Four Direct Numerical Simulation (DNS) datasets covering effective freestream Mach numbers of 8 through 14 are used to investigate the behavior of turbulence-induced aero-optical distortions in hypersonic boundary layers. The datasets include two from simulations of flat plate boundary layers (Mach 8 and 14) and two from simulations of flow over a sharp cone (Mach 8 and 14). Instantaneous three-dimensional fields of density from each DNS are converted to refraction index and integrated to produce distributions of the Optical Path Differences (OPD) caused by turbulence. These values are then compared to experimental data from the literature and to an existing model for the root-mean-square of the OPD. Although the model was originally developed for flows with Mach ≤ 5, it provides a basis to which we compare the hypersonic data.
N. E. Miller et al., "Aero-optical Distortions Of Turbulent Boundary Layers: Hypersonic Dns," AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2022, American Institute of Aeronautics and Astronautics, Jan 2022.
The definitive version is available at https://doi.org/10.2514/6.2022-0056
Mechanical and Aerospace Engineering
International Standard Book Number (ISBN)
Article - Conference proceedings
© 2023 American Institute of Aeronautics and Astronautics, All rights reserved.
01 Jan 2022