Doctoral Dissertations

Abstract

"Standard approaches for simulating hypersonic flows in particle-laden environments have key limitations in practice, such as high cost and numerical noise. In this work, efficient solution strategies for particle-laden hypersonic flows were developed using both Lagrangian and Eulerian models for the particle phase with the focus on investigating spacecraft surface erosion, as well as convective and radiative heat flux augmentation due to atmospheric particulate encountered during planetary entry.

First, an efficient integration strategy for Lagrangian methods, the Trajectory Control Volume (TCV) method, was developed for steady analysis of dilute particle phase problems on general geometries. The TCV method was shown to produce accurate dust impact surface erosion distributions with three orders of magnitude fewer particle samples as compared with Monte Carlo techniques. The TCV approach also enabled the uncertainty quantification of heat-shield dust impact erosion during Mars entry with the non-intrusive polynomial chaos method. The TCV method was extended for analysis of two-way coupled problems and verified for hypersonic flow problems. Application of the technique to a Mars entry case showed that convective heat flux augmentation was insignificant.

Besides the TCV approach, a particle phase solver based on an Eulerian model was developed for hypersonic flow problems and used to predict radiation scattering properties for a Mars entry flowfield. A radiation solver based on the P1 spherical harmonics method was used to predict radiative heat flux augmentation due to scattering, which showed little effect for nominal dust loading conditions. Additional augmentation mechanisms were shown to be insignificant for representative Mars and Titan problems.

The methods developed in this work provided valuable insight into the aerothermo- dynamic interactions between the gas and the particle phase for planetary entry missions and are expected to contribute to efficient analysis of particle-laden flows for general hypersonic applications in the future" -- Abstract, p. iv

Advisor(s)

Hosder, Serhat

Committee Member(s)

Bayless, David J.
Han, Daoru
Johnston, Christopher
Riggins, David W.
Vigano, Davide

Department(s)

Mechanical and Aerospace Engineering

Degree Name

Ph. D. in Aerospace Engineering

Publisher

Missouri University of Science and Technology

Publication Date

Summer 2024

Pagination

xiv, 164 pages

Note about bibliography

Includes_bibliographical_references_(pages 156-163)

Rights

©2024 Andrew Hinkle , All Rights Reserved

Document Type

Dissertation - Open Access

File Type

text

Language

English

Thesis Number

T 12385

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