Theses and Dissertations

Issuing Body

Mississippi State University

Advisor

Bhushan, Shanti

Committee Member

Bhatia, Manav

Committee Member

Collins, Eric

Date of Degree

8-7-2020

Document Type

Graduate Thesis - Open Access

Major

Mechanical Engineering

Degree Name

Master of Science

College

James Worth Bagley College of Engineering

Department

Department of Mechanical Engineering

Abstract

A coupled fluid-structure interaction solver capability is developed and validated. A high fidelity fluids solver, Loci-Chem, is coupled with a finite-element structural dynamics toolkit, MAST. The coupled solver is validated for the prediction of several panel instability cases in uniform flows and in the presence of an impinging shock for a range of subsonic and supersonic Mach numbers, dynamic pressures, and pressure ratios. The panel deflections and limit-cycle oscillation amplitudes, frequencies, and bifurcation point predictions compare very well with benchmark results for 2D simulations. The same procedures outlined in the validation study have been applied to simulations of varying dynamic pressures at M = 2 for an impinging oblique shockwave. The influence of inviscid, laminar and turbulent boundary layer profiles on the development of flow field characteristics has been analyzed, and laminar predictions characterized by a large flow separation results in vastly different behavior than that of traditional flutter.

URI

https://hdl.handle.net/11668/18444

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