Accession Number:

ADA463601

Title:

Laser Diagnostics for Reacting Flows

Descriptive Note:

Final rept. 1 Nov 2003-31 Oct 2006

Corporate Author:

STANFORD UNIV CA HIGH TEMPERATURE GASDYNAMICS LAB

Personal Author(s):

Report Date:

2007-01-30

Pagination or Media Count:

72.0

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. Laser sources included tunable cw near-infrared diode lasers and tunable or fixed-wavelength pulsed lasers operated at ultraviolet UV or infrared IR wavelengths. The cw lasers were spectrally narrow, allowing study of innovative diagnostics based on spectral lineshapes, while the pulsed lasers provided intense bursts of photons needed for techniques based on LIF. Accomplishments of note included 1 development of a new imaging diagnostic based on infrared planar laser-induced fluorescence IR PLIF, 2 investigations of quantitative ultraviolet UV PLIF of NO and CO2 in high-pressure combustion environments, 3 the development of a new temperature diagnostic using UV absorption of CO2 for high-temperature combustion environments, 4 development of advanced wavelength-multiplexed diode laser absorption sensing of non-uniform temperature distributions, gas temperature in scramjet flows, and tunable mid-IR-based fuel sensing, and 5 further development of quantitative tracers to image fuel distribution using ketones and the aromatic toluene. The full spectrum of results was published in thirty-eight papers in the AIAA and peer reviewed literature, seven PhD theses, and forty-three presentations and invited lectures.

Subject Categories:

  • Radiation and Nuclear Chemistry
  • Lasers and Masers
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE