Advanced Diagnostics for Reacting Flows.
Abstract
Progress is summarized for the past four years of a research program on advanced diagnostic techniques for combustion gases and plasmas. The parameters of interest are species concentrations, temperature, density, pressure, velocity, mass flow rate and thrust. The techniques studied are based on laser spectroscopy, particularly laser absorption and laser-induced fluorescence. Sources include tunable cw diode lasers and tunable pulsed lasers. The cw lasers are spectrally narrow, allowing study of new techniques based on spectral lineshapes and shifts, while the pulsed lasers provide intense bursts of photons needed for techniques based on light-scattering phenomena. Accomplishments of note include: the first use of diode lasers for absorption and fluorescence measurements in combustion gases and plasmas; development of an optical diagnostic for mass flux and thrust; the first use of laser absorption to monitor atomic nitrogen and oxygen; development of wavelength-multiplexing to allow multiple-species absorption measurements along a common optical path; demonstration of quantitative PLIF methods for temperature and velocity imaging in supersonic flows; development of acetone seeding for improved PLIF imaging; and the first application of PLIF to shock tunnel flows.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 12, 1995
- Accession Number
- ADA299535
Entities
People
- Ronald Kenneth Hanson
Organizations
- Stanford University