Laser-based diagnostics for hydrocarbon fuels in the liquid and vapor phases
Abstract/Contents
- Abstract
- Laser-absorption measurements of fuel concentration are widely used in engine development and for studying the combustion chemistry of hydrocarbon fuels. Direct injection of liquid fuel is common in many combustion technologies (e.g. internal combustion engines and gas turbine engines), however, these multiphase (gas and liquid) environments present significant challenges to laser-absorption measurements. These challenges include optical scattering from liquid fuel droplets and strong optical absorption from liquid fuel films. This thesis describes the development of two novel multi-phase diagnostics. Developing these diagnostics required quantitative measurements of the previously unknown refractive index spectra of several liquid hydrocarbons (n-decane, n-dodecane, and several gasoline samples). These measurements are presented, revealing important characteristics of liquid fuels. The first diagnostic developed uses three laser wavelengths for measuring fuel-vapor mole fraction and temperature in evaporating aerosols. Demonstration measurements were made over a large range of temperatures and fuel loadings in an aerosol shock tube, providing the first known laser-absorption measurements of vapor concentration and temperature in an evaporating fuel spray. The second diagnostic uses two laser wavelengths for measurements of fuel-vapor mole fraction and liquid fuel film thickness. The first known laser-absorption measurements of fuel vapor and liquid film thickness were demonstrated in the laboratory. These diagnostic techniques have been incorporated into a commercial sensor for engine development.
Description
| Type of resource | text |
|---|---|
| Form | electronic; electronic resource; remote |
| Extent | 1 online resource. |
| Copyright date | 2010 |
| Publication date | 2009, c2010; 2009 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Associated with | Porter, Jason Morgan |
|---|---|
| Associated with | Stanford University, Department of Mechanical Engineering |
| Primary advisor | Hanson, Ronald |
| Thesis advisor | Hanson, Ronald |
| Thesis advisor | Bowman, Craig T. (Craig Thomas), 1939- |
| Thesis advisor | Jeffries, Jay Barker |
| Advisor | Bowman, Craig T. (Craig Thomas), 1939- |
| Advisor | Jeffries, Jay Barker |
Subjects
| Genre | Theses |
|---|
Bibliographic information
| Statement of responsibility | Jason Morgan Porter. |
|---|---|
| Note | Submitted to the Department of Mechanical Engineering. |
| Thesis | Ph.D. Stanford University 2010 |
| Location | electronic resource |
Access conditions
- Copyright
- © 2010 by Jason Morgan Porter
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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