Laser Diagnostics for Reacting Flows
Abstract
Advanced optical diagnostic techniques relevant to propulsion were investigated. The techniques studied were based on laser spectroscopy, with emphasis on spectrally-resolved absorption and laser-induced fluorescence (LIF) . Spectrally narrow, continuous wave (cw) lasers allowed innovative diagnostics based on spectral line shapes, while pulsed lasers provided intense bursts of photons needed for techniques based on LIF. Accomplishments of note included: studies of fundamental ketone in Support of PLIF imaging diagnostics for fuel vapor and temperature; fabrication of a high-pressure flat-flame burner and its use to develop quantitative strategies for PLIF imaging of NO and temperature in high-pressure combustion systems; the first observation of ultraviolet (UV) LIF of CO2; continued development of a new imaging diagnostic based on infrared planar laser-induced fluorescence (IR PLIF); discovery of strong IN absorption by CO2 at high temperatures and measurements of the absorption cross sections; investigations of the impact of UV CO2 absorption on existing diagnostic strategies for NO; initial demonstrations of a new wavelength-multiplexed laser extinction diagnostic allowing measurements in multiphase fuel flows; and continued development of wavelength-multiplexed tunable diode laser absorption sensors and their application to measure temperature and species concentration in practical combustion environments, including scramjet and gas turbine combustion test rigs at the Air Force Research Laboratory Propulsion Directorate.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 25, 2004
- Accession Number
- ADA424171
Entities
People
- Ronald Kenneth Hanson
Organizations
- Stanford University