High-speed tracer-based PLIF imaging for scramjet ground testing
Abstract/Contents
- Abstract
- The scramjet engine holds much promise for hypersonic atmospheric flight. In a scramjet engine, fuel is injected into a supersonic stream of air, and this fuel must mix and burn with the air before exiting out the back of the engine. Achieving stable, reliable combustion in a scramjet has been a technical challenge throughout the development of scramjet powered vehicles. The coupling of turbulence and combustion results in a complex non-linear system, prone to several catastrophic failure modes. To better understand the mixing and combustion processes in a scramjet, ground testing facilities are needed to reproduce the extreme conditions in a scramjet combustor, and advanced diagnostics are needed to probe these flow fields. This thesis describes a hypersonic ground testing facility as well as the extension of a laser-based imaging diagnostic to supersonic flows generated in impulse facilities. The thesis is divided into three sections: 1) (Chapter 2) the first section describes the Stanford Expansion Tube Facility, details of its operation, capabilities, and conventional diagnostic capabili- ties, including high-speed schlieren and high-quality pressure measurements; 2) (Chapters 3 and 4) the second section describes the development of toluene planar laser-induced fluorescence (PLIF) temperature imaging in an expansion tube and a rigorous method to correct for background signals in PLIF imaging; 3) (Chapters 5 and 6) the third section describes the application of new, kHz-rate pulsed light sources for tracer-based PLIF imaging, culminating with the demonstration of the technique by visualizing a jet in sonic crossflow in the expansion tube at 20 kHz. An overview of additional scramjet studies conducted at the Stanford Expansion Tube Facility and the application of the diagnostics described within this thesis can be found in the appendices.
Description
| Type of resource | text |
|---|---|
| Form | electronic; electronic resource; remote |
| Extent | 1 online resource. |
| Publication date | 2014 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Associated with | Miller, Victor A |
|---|---|
| Associated with | Stanford University, Department of Mechanical Engineering. |
| Primary advisor | Hanson, Ronald |
| Thesis advisor | Hanson, Ronald |
| Thesis advisor | Cappelli, Mark A. (Mark Antony) |
| Thesis advisor | Levin, Craig |
| Thesis advisor | Mungal, Mark Godfrey |
| Advisor | Cappelli, Mark A. (Mark Antony) |
| Advisor | Levin, Craig |
| Advisor | Mungal, Mark Godfrey |
Subjects
| Genre | Theses |
|---|
Bibliographic information
| Statement of responsibility | Victor A. Miller. |
|---|---|
| Note | Submitted to the Department of Mechanical Engineering. |
| Thesis | Thesis (Ph.D.)--Stanford University, 2014. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2014 by Victor Alexander Miller
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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