Use of an extractive laser probe for time-resolved mixture fraction measurements in a 9 atm gas turbine fuel injector

James W. Girard, Robert Dibble, Leonel O. Arellano, Kenneth O. Smith

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

This paper describes the use of a high velocity extractive sampling probe in a gas turbine fuel injector operating at 9 atm. This instrument has the ability to measure the temporal and spatial fluctuations of the mixture fraction. Knowledge of the fuel-air mixing characteristics is necessary to further decrease levels of pollutant emissions such as nitrogen oxides (NO x), and to sustain stable combustion. The extractive probe resolves temporal fluctuations due to the high flow rate through the sampling probe. The residence time of the sample gas in the sampling probe is sufficiently short so that axial diffusion on the relevant time scale can be ignored. Measurements were taken at two operating points: one at a stable low-emissions condition, and one at a condition where pressure oscillations in the combustor were high. At the second operating point, it was found that the frequencies of the pressure oscillations coincided with the frequencies of fluctuation in air-fuel ratio resolved by the probe.

Original languageEnglish (US)
Title of host publicationManufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Print)9780791878538
DOIs
StatePublished - Jan 1 2001
EventASME Turbo Expo 2001: Power for Land, Sea, and Air, GT 2001 - New Orleans, LA, United States
Duration: Jun 4 2001Jun 7 2001

Publication series

NameProceedings of the ASME Turbo Expo
Volume4

Other

OtherASME Turbo Expo 2001: Power for Land, Sea, and Air, GT 2001
CountryUnited States
CityNew Orleans, LA
Period06/4/0106/7/01

ASJC Scopus subject areas

  • Engineering(all)

Fingerprint

Dive into the research topics of 'Use of an extractive laser probe for time-resolved mixture fraction measurements in a 9 atm gas turbine fuel injector'. Together they form a unique fingerprint.

Cite this