ORCID
0000-0002-4931-4487
Keywords
computational fluid dynamics, multiphase flow, hypersonics, coatings, microfluidics
Abstract
The Volume-of-Fluid method, an Eulerian multiphase flow model that adds a volume fraction transport equation to the CFD governing equations, is widely used for any fluid-fluid interface tracking problem. There are important aspects of multiphase flow that impact aircraft flight, especially flight in extreme environments. These extreme environments can range from wet, icy conditions to sandstorms, and volcanic debris. The problems posed by these harsh environments are only exacerbated by aircraft that tend to travel at higher Mach-numbers. The specific aims of the proposed research include application of the Volume-of-fluid method to the following aspects of aircraft flight: shock-droplet interactions, and molten CMAS infiltrating a thermal barrier coating. Passive scalars are used in novel ways to elucidate droplet breakup physics. From this, a mechanism for how instabilities form on the air-droplet interface is discovered. It is also found that non-cavitating droplet breakup becomes much less dependent on Mach number at higher Mach numbers. A cavitation model designed for underwater explosions is adapted to the shock-droplet problem, and results show that cavitation phenomena is greatly dependent on Mach number, but the adapted model overpredicts cavitation effects. 2D and 3D CFD models are developed for the CMAS infiltration problem, and those are compared to analytical models from literature, and a new proposed analytical model called the feathery pipe network model. Results show that feathery pipe network model is both computationally inexpensive, and allows parameterization of useful properties.
Completion Date
2024
Semester
Fall
Committee Chair
Kinzel, Michael
Degree
Doctor of Philosophy (Ph.D.)
College
College of Engineering and Computer Science
Department
Mechanical and Aerospace Engineering
Degree Program
Aerospace Engineering
Format
Identifier
DP0028976
Language
English
Release Date
12-15-2024
Access Status
Dissertation
Campus Location
Orlando (Main) Campus
STARS Citation
Cavainolo, Brendon A., "Numerical and Analytical Evaluations of Impact of Atmospheric Particles on Aircraft" (2024). Graduate Thesis and Dissertation post-2024. 15.
https://stars.library.ucf.edu/etd2024/15
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