Accession Number:

ADA532904

Title:

Ultrahigh-frame-rate OH Fluorescence Imaging in Turbulent Flames using a Burst-Mode Optical Parametric Oscillator

Descriptive Note:

Journal article

Corporate Author:

AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIRECTORATE

Report Date:

2009-05-01

Pagination or Media Count:

4.0

Abstract:

Burst-mode planar laser-induced fluorescence PLIF imaging of the OH radical is demonstrated in laminar and turbulent hydrogen-air diffusion flames with pulse repetition rates up to 50 kHz. Nearly 1 mJpulse at 313.526 nm is used to probe the OH P210 rotational transition in the 0,0 band of the A-X system. The UV radiation is generated by a high-speed-tunable, injection-seeded optical parametric oscillator pumped by a frequency-doubled megahertz-rate burst-mode NdYAG laser. Preliminary kilohertz-rate wavelength scanning of the temperature-broadened OH transition during PLIF imaging is also presented for the first time to our knowledge, and possible strategies for spatiotemporally resolved planar OH spectroscopy are discussed. 2009 Optical Society of America

Subject Categories:

  • Fluid Mechanics
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE