Accession Number:

ADA275057

Title:

Advanced Diagnostics for Reacting Flows

Descriptive Note:

Annual technical rept. 1 Nov 1992-31 Oct 1993

Corporate Author:

STANFORD UNIV CA DEPT OF MECHANICAL ENGINEERING

Personal Author(s):

Report Date:

1993-11-24

Pagination or Media Count:

124.0

Abstract:

Progress is reported for the past year of an interdisciplinary program aimed at establishing advanced optical diagnostic techniques applicable to combustion gases and plasmas, with some emphasis on high speed flows. The primary parameters of interest are species concentrations including electrons, temperature, mass density, pressure, velocity, and quantities derivable from these parameters such as mass flow rate from the product of density and velocity. The techniques under study are based on laser spectroscopy, particularly laser absorption and laser-induced fluorescence, with the latter capable of providing both single-point and multi-point 2-D and 3-D measurements. Laser sources include tunable cw lasers ring dye and semiconductor diode lasers and tunable pulsed lasers excimer-pumped dye and narrow-linewidth excimer. The cw lasers are spectrally narrow, allowing study of a new class of techniques based on spectral lineshapes and shifts, while the pulsed lasers provide intense bursts of photons needed for techniques based on light-scattering phenomena.

Subject Categories:

  • Lasers and Masers
  • Fluid Mechanics
  • Plasma Physics and Magnetohydrodynamics
  • Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE