Type of Document Master's Thesis Author Tinker, Darren Charles URN etd-11212016-181808 Title Partially premixed tubular flames: an experimental survey Degree Master of Science Department Mechanical Engineering Advisory Committee
Advisor Name Title Robert W. Pitz Committee Chair Amrutur V. Anilkumar Committee Member Haoxiang Luo Committee Member Keywords
- Cellular Flames
- Tubular Flames
- Partially Premixed
- Raman Spectroscopy
Date of Defense 2016-11-18 Availability unrestricted AbstractTurbulent combustion, as seen in practical combustors, is highly complex and beyond current numerical means to accurately simulate. Simplifying assumptions commonly used in computational models approximate the complexity of small scale reaction and mixing to reduce computational cost, but these estimates cost accuracy. It is a necessity to understand fundamental aspects of combustion and what approximations do not sacrifice accuracy while reducing computational expenses. The study of laminar flames allows full simulation of chemical kinetics and transport, and evaluation of combustion phenomena.
The experimental work to follow presents characterization of partially premixed tubular flames containing premixed hydrogen-air streams imposed on fuels diluted by carbon dioxide. The tubular flame structures are novel, containing distinct zones of premixed and diffusion flames. Flames have resemblance to turbulent flames, - local extinction zones, varying curvature, and zones of enhancement, - while existing in a steady-state and allowing detailed laser diagnostics of flame structure.
Due to the novelty of partially premixed tubular flames, the objectives of the research to follow are: 1) parametrically survey and analyze stable flame geometry via chemiluminescence and 2) perform non-intrusive Raman spectroscopy on select cases to develop a fundamental understanding of flame composition as a foundation for numerical comparison and validation.
Filename Size Approximate Download Time (Hours:Minutes:Seconds)
28.8 Modem 56K Modem ISDN (64 Kb) ISDN (128 Kb) Higher-speed Access Tinker.pdf 2.93 Mb 00:13:32 00:06:57 00:06:05 00:03:02 00:00:15