Title page for ETD etd-03142001-144036


Type of Document Master's Thesis
Author Haber, Ludwig Christian
Author's Email Address ludhaber@vt.edu
URN etd-03142001-144036
Title An investigation into the origin, measurement and application of chemiluminescent light emissions from premixed flames
Degree Master of Science
Department Mechanical Engineering
Advisory Committee
Advisor Name Title
Vandsburger, Uri Committee Chair
Dancey, Clinton L. Committee Member
Saunders, William R. Committee Member
Keywords
  • combustion
  • modeling
  • chemiluminescence
Date of Defense 2000-12-14
Availability unrestricted
Abstract
The chemiluminescent species CH* and OH* are studied in premixed methane combustion to investigate the possible application of their light emissions in gas turbine combustion monitoring systems. The interpretation of integrated and local chemiluminescence measurements are shown to give important qualitative insights into the burning process. The formation path of OH* chemiluminescence is clarified and an accurate chemical kinetic model predicting OH* chemiluminescence emission is developed using GRIMECH 3.0 as a starting point for methane oxidation. CH* chemiluminescence is also modeled but difficulties in obtaining quenching data make the modeling efforts somewhat less successful than that for OH* chemiluminescence. Two combustion models are developed. The first is a semi-empirical model for a Bunsen type flame. The second is a 1-D model for a ceramic honeycomb flat-flame burner using the full chemical kinetics description of the conversion from fuel to products along with a detailed energy equation, accounting for the radiation energy exchange between hot gases and the honeycomb burner ceramic. The results of the modeling calculations show that OH* is superior to CH* chemiluminescence in terms of indicating heat-release rate. The formation of the ratio between CH* and OH* chemiluminescence is shown to be an accurate indicator of equivalence ratio.
Files
  Filename       Size       Approximate Download Time (Hours:Minutes:Seconds) 
 
 28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access 
  01front_matter.pdf 39.53 Kb 00:00:10 00:00:05 00:00:04 00:00:02 < 00:00:01
  02table_of_contents.pdf 31.57 Kb 00:00:08 00:00:04 00:00:03 00:00:01 < 00:00:01
  03nomenclature.pdf 37.45 Kb 00:00:10 00:00:05 00:00:04 00:00:02 < 00:00:01
  04List_of_figures_tables.pdf 29.34 Kb 00:00:08 00:00:04 00:00:03 00:00:01 < 00:00:01
  05Chapter_1.pdf 66.16 Kb 00:00:18 00:00:09 00:00:08 00:00:04 < 00:00:01
  06Chapter_2.pdf 3.13 Mb 00:14:28 00:07:26 00:06:30 00:03:15 00:00:16
  07Chapter_3.pdf 43.55 Kb 00:00:12 00:00:06 00:00:05 00:00:02 < 00:00:01
  08Chapter_4.pdf 83.87 Kb 00:00:23 00:00:11 00:00:10 00:00:05 < 00:00:01
  09Chapter_5.pdf 170.66 Kb 00:00:47 00:00:24 00:00:21 00:00:10 < 00:00:01
  10Chapter_6.pdf 86.00 Kb 00:00:23 00:00:12 00:00:10 00:00:05 < 00:00:01
  11Chapter_7.pdf 1.37 Mb 00:06:21 00:03:16 00:02:51 00:01:25 00:00:07
  12Chapter_8.pdf 765.53 Kb 00:03:32 00:01:49 00:01:35 00:00:47 00:00:04
  13Chapter_9.pdf 855.54 Kb 00:03:57 00:02:02 00:01:46 00:00:53 00:00:04
  14Chapter_10.pdf 186.66 Kb 00:00:51 00:00:26 00:00:23 00:00:11 < 00:00:01
  15Chapter_11.pdf 28.50 Kb 00:00:07 00:00:04 00:00:03 00:00:01 < 00:00:01
  16Appendices.pdf 182.40 Kb 00:00:50 00:00:26 00:00:22 00:00:11 < 00:00:01

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