Form 9.B Project Summary

Chron: 972408

Proposal Number: 02.01-1322

Project Title: Quantitative Combustion Diagnostics for Fuel Sulfur Oxidation in Jet Engine Combustors

Technical Abstract (Limit 200 words)

Quantitative combustion diagnostics are needed to study the fuel sulfur oxidation chemistry in jet engine combustors which affects aerosol loading in the atmosphere. Absolute concentration measurements of key combustion radicals and intermediates provide a platform to validate the current sulfur oxidation model and to predict the aerosol loading by jet engines. Current laser-based combustion diagnostics exhibit high spatial and temporal sensitivity, but they often yield relative concentration profiles especially under high pressure conditions due to extreme sensitivity to changes in collisional quenching. We propose to develop a spatially resolved, high sensitivity quantitative combustion diagnostic based on a novel tunable UV source that is compatible with high pressure and high temperature combustor conditions. The tunable UV source, based on nonlinear upconversion of a tunable diode laser beam with fixed frequency radiation, will be used to perform line-of-sight high sensitivity absorption and laser induced fluorescence (LIF) measurements simultaneously. In Phase I, we target spatially resolved concentration measurements of OH in laboratory flames for the feasibility demonstration. In Phase II, we plan to extend the UV wavelength coverage to include other key species relevant to sulfur oxidation chemistry including SO2, and to validate the measurement approach through a series of jet engine combustor measurements.

Potential Commercial Applications (Limit 200 words)

The proposed technology will be useful as a quantitative combustion diagnostic tool in development of rocket and jet engines, turbines, and wind tunnel combustion facilities. The tunable UV source developed in this project will also be useful for environmental monitoring of many important trace species emitted by power plants, municipal incinerators, chemical plants, and oil refineries.

Name and Address of Principal Investigator (Name,

Organization Name, Mail Address, City/State/Zip)

Daniel B. Oh

Southwest Sciences, Inc.

1570 Pacheco St., Suite E-11

Santa Fe , NM 87505

Name and Address of Offeror (Firm Name, Mail Address,

City/State/Zip)

Alan C. Stanton

Southwest Sciences, Inc.

1570 Pacheco St., Suite E-11

Santa Fe , NM 87505