Response Enhancement for PITLIF Instrument (AASERT96)
Abstract
This research is concerned with the development of a technique for quantitative, minor-species concentration, time-series measurements in turbulent flames. Past work has demonstrated the capability of picosecond time-resolved laser-induced fluorescence (PITLIF) to obtain sufficient signal with present laser technology to achieve this goal. The specific aim of this AASERT project is to refine the capabilities of the PITLIF instrument. The last progress report detailed the numerical modeling of the PITLIF instrument and feasibility studies for a new data-collection system. During the past year, this new instrumentation, termed LIFTIME, has been installed and tested. As demonstrated here, LIFTIME is capable of making rapid and continuous fluorescence-lifetime measurements as required for quantitative measurements of concentration. The effectiveness of the technique was verified by applying LIFTIME to two known-fluorescence liquids for which the fluorescence lifetime was monitored up to a sampling rate of 500 Hz with less than 10 percent uncertainty. LIFTIME was also tested by measuring hydroxyl concentrations in nine laminar flames. The results are shown to agree well with both previous measurements and predictions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 28, 1998
- Accession Number
- ADA353442
Entities
People
- Galen B. King
- Normand M. Laurendeau
Organizations
- Purdue University