Mechanical Engineering ETDs

Publication Date

Fall 11-14-2022

Abstract

ABSTRACT

In many models and experiments using shock tubes and shock tube instabilities, measurements of velocity and position of the flow features are frequently taken in a single horizontal direction (or in one plane), however, the three-dimensional flow structure is important and cannot be fully resolved by such measurements. By placing a mirror at 45 degrees atop a test section of a shock tube, it becomes possible to visualize the flow from two directions simultaneously. The mirror is used to see if viable data can be gathered from the second view in conjunction with the main view. With high-speed video imaging, it becomes possible to visualize the three-dimensional structure of the shock interaction with the structure of interest, for example, a particle curtain. From the videos in conjunction with the pressure traces, the Mach number is verified, and the perturbation growth is measured from frame to frame. Through this method, shock driven instability can be observed. This provides the visual and experimental basis for validating numerical simulations including reduced-order instability models.

Keywords

Shock-Driven Multi-phase Instability, Shock Tube, Particle Curtain, Evolution of Shock-driven instabilities, Fluid Instability

Degree Name

Mechanical Engineering

Level of Degree

Masters

Department Name

Mechanical Engineering

First Committee Member (Chair)

Peter Vorobieff

Second Committee Member

Mohan Gowtham

Third Committee Member

Darryn Fleming

Document Type

Thesis

Language

English

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