The use of chemiluminescence for detection of ignition, temperature, and fuel-to-air ratio of flames
dc.contributor.author | Johnsson, Erik L. | en |
dc.contributor.committeemember | Roby, Richard J. | en |
dc.contributor.committeemember | O'Brien, Walter F. Jr. | en |
dc.contributor.committeemember | Roe, Larry A. | en |
dc.contributor.department | Mechanical Engineering | en |
dc.date.accessioned | 2014-03-14T21:35:21Z | en |
dc.date.adate | 2009-05-02 | en |
dc.date.available | 2014-03-14T21:35:21Z | en |
dc.date.issued | 1991-02-05 | en |
dc.date.rdate | 2009-05-02 | en |
dc.date.sdate | 2009-05-02 | en |
dc.description.abstract | A fast response method for detection of ignition and extinction of liquid spray flames has been improved. Also, a method of determining fuel-to-air ratios and temperatures of pre-mixed, gaseous flames has been developed. Both methods utilize chemiluminescent signals from an OH system centered at 309 nm and a CH system centered at 431 nm. The ignition and extinction method was improved by replacing an optical system composed of lenses and a monochromator by a system composed of a fiber optic cable and band pass interference filters. The use of a solid-state photodiode instead of a photomultiplier tube was investigated. Transient histories of the OH and CH signals were recorded by performing light-off ignition and intermittent ignition flame tests. These signal histories were compared to histories obtained using the original apparatus. The fuel-to-air ratio and temperature detection method was investigated by recording the spectra of laminar, pre-mixed methane flames of known stoichiometry with a lens, monochromator, and photomultiplier tube set-up and measuring the flame temperatures with a high-temperature Pt-10%Rh thermocouple. Various combinations of signal characteristics were found to be functions of fuel-to-air ratio and temperature. Optimum signals for monitoring with a detector were determined. Recommendations for future work in this area are discussed. | en |
dc.description.degree | Master of Science | en |
dc.format.extent | x, 124 leaves | en |
dc.format.medium | BTD | en |
dc.format.mimetype | application/pdf | en |
dc.identifier.other | etd-05022009-040621 | en |
dc.identifier.sourceurl | http://scholar.lib.vt.edu/theses/available/etd-05022009-040621/ | en |
dc.identifier.uri | http://hdl.handle.net/10919/42410 | en |
dc.language.iso | en | en |
dc.publisher | Virginia Tech | en |
dc.relation.haspart | LD5655.V855_1991.J656.pdf | en |
dc.relation.isformatof | OCLC# 23810460 | en |
dc.rights | In Copyright | en |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | en |
dc.subject.lcc | LD5655.V855 1991.J656 | en |
dc.subject.lcsh | Chemiluminescence | en |
dc.subject.lcsh | Flame | en |
dc.title | The use of chemiluminescence for detection of ignition, temperature, and fuel-to-air ratio of flames | en |
dc.type | Thesis | en |
dc.type.dcmitype | Text | en |
thesis.degree.discipline | Mechanical Engineering | en |
thesis.degree.grantor | Virginia Polytechnic Institute and State University | en |
thesis.degree.level | masters | en |
thesis.degree.name | Master of Science | en |
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