Accession Number:

ADA530808

Title:

Laser Diagnostics for Reacting Flows

Descriptive Note:

Final rept. 1 Dec 2006-30 Nov 2009

Corporate Author:

STANFORD UNIV CA HIGH TEMPERATURE GASDYNAMICS LAB

Personal Author(s):

Report Date:

2010-01-11

Pagination or Media Count:

84.0

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 NIR diode lasers and tunable or fixed-wavelength pulsed lasers operated at ultraviolet UV wavelengths. Accomplishments of note included 1 development of a new pressure- and temperature-dependent database for tracer-based planar laser induced fluorescence PLIF imaging with 3-pentanone, 2 the first demonstration of high-speed PLIF using CW excitation, 3 development and demonstration of new tracer-based PLIF strategies for imaging interactions of high-speed flows with obstacles and boundary layers, 4 the extension of advanced wavelength-multiplexed diode laser sensing to absorption transitions of H2O and CO2 in the extended NIR through use of newly available diode laser sources, 5 extension of diode laser absorption sensing to high-pressure environments, 6 the demonstration of wavelength-multiplexed strategies for quantitative measurements of hydrocarbon fuels in the presence of liquid fuel aerosols and liquid fuel films, and 7 applications of tunable-diode-laser TDL absorption sensors in scramjet flows at the AFRL at Wright-Patterson AFB using wavelength-multiplexed lasers and 1f-normalized, wavelength modulation spectroscopy with a 2f detection strategy. The full spectrum of results for the reporting period was published in thirty-six papers in the peer-reviewed literature, five PhD theses, and thirty-two presentations and invited lectures.

Subject Categories:

  • Lasers and Masers
  • Miscellaneous Detection and Detectors
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE