Unified Design Methodology Based on Second Damkohler Number for Colorless Distributed Combustion and Conventional Flame ...

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Material Information

Title:
Unified Design Methodology Based on Second Damkohler Number for Colorless Distributed Combustion and Conventional Flame Regimes
Physical Description:
1 online resource (104 p.)
Language:
english
Creator:
Schulze, Kurt Donald
Publisher:
University of Florida
Place of Publication:
Gainesville, Fla.
Publication Date:

Thesis/Dissertation Information

Degree:
Doctorate ( Ph.D.)
Degree Grantor:
University of Florida
Degree Disciplines:
Mechanical Engineering, Mechanical and Aerospace Engineering
Committee Chair:
LEAR,WILLIAM E,JR
Committee Co-Chair:
INGLEY,HERBERT A,III
Committee Members:
HAHN,DAVID WORTHINGTON
CRISALLE,OSCAR DARDO

Subjects

Subjects / Keywords:
colorless -- combustion -- damkohler -- distributed -- flameless -- gas -- low -- nox -- second -- turbine
Mechanical and Aerospace Engineering -- Dissertations, Academic -- UF
Genre:
Mechanical Engineering thesis, Ph.D.
bibliography   ( marcgt )
theses   ( marcgt )
government publication (state, provincial, terriorial, dependent)   ( marcgt )
born-digital   ( sobekcm )
Electronic Thesis or Dissertation

Notes

Abstract:
Colorless distributed combustion (CDC) has been of interest due to its inherent low emissions and fuel flexibility, particularity in gas turbine applications.  In the literature, various configurations of fuel/air orientation, preheating and combustor geometry have been used to achieve CDC, with mixed results.  Of interest is a general preliminary design scaling methodology, one that includes design in the CDC regime. It is hypothesized that NOx formation is controlled by the physics at the smallest turbulent scales, where competition between diffusion and reaction kinetics are characterized by the second Damköhler number. The methodology relates global design parameters to those detailed physics. The experimental portion of this study utilized a novel combustor created to develop forced, internal recirculation by jet impingement and a well-stirred reactor environment within the reaction zone. NOx emission measurements are presented for cases of varying fuel/air preheat, fuel/air premix ratios, equivalence ratios, and air dilution.  Based on the experimental data, low NOx formation was found to be correlated to low second Damköhler number when conditions provided increased diffusion in the reaction zone. Results of NOx emissions measurements, together with visual observations, indicate that CDC provides a promising alternative means to achieve low NOx emissions in gas turbine combustors. Further, the NOx emissions appear to correlate well with the second Damköhler number across the CDC and flame regimes studied. The methodology developed here by which Damköhler number is estimated from global parameters has been shown to be a promising unified approach to preliminary design of combustion systems.
General Note:
In the series University of Florida Digital Collections.
General Note:
Includes vita.
Bibliography:
Includes bibliographical references.
Source of Description:
Description based on online resource; title from PDF title page.
Source of Description:
This bibliographic record is available under the Creative Commons CC0 public domain dedication. The University of Florida Libraries, as creator of this bibliographic record, has waived all rights to it worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law.
Statement of Responsibility:
by Kurt Donald Schulze.
Thesis:
Thesis (Ph.D.)--University of Florida, 2014.
Local:
Adviser: LEAR,WILLIAM E,JR.
Local:
Co-adviser: INGLEY,HERBERT A,III.
Electronic Access:
RESTRICTED TO UF STUDENTS, STAFF, FACULTY, AND ON-CAMPUS USE UNTIL 2014-11-30

Record Information

Source Institution:
UFRGP
Rights Management:
Applicable rights reserved.
Classification:
lcc - LD1780 2014
System ID:
UFE0046438:00001