Enhanced Laser System for Two-Point Scalar Time-Series Measurements in Turbulent Partially Premixed Flames

Abstract

Picosecond time-resolved laser-induced fluorescence (PITLIF) has been shown to be a valuable tool for turbulent combustion research. The laser system enhancement enabled by this grant has significantly increased the range of systems that may be studied utilizing the PITLIF method. The enhanced laser system has increased the frequency tripled laser power by nearly an order of magnitude from 35 mW for the previous system to over 300 mW for the current system (at 306.5 nm). Additionally, pump laser noise has been decreased by over -40 dB in a similar comparison. The enhanced system has allowed a range of combustion systems of interest to the Air Force to be studied, including thermoacoustic instabilities and partially premixed turbulent combustion.

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Document Details

Document Type
Technical Report
Publication Date
May 15, 2007
Accession Number
ADA475017

Entities

People

  • Galen B. King

Organizations

  • Purdue University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Chemistry
  • Combustion
  • Fluorescence
  • Frequency
  • Gas Turbines
  • Heat Transfer
  • Instability
  • Jet Flames
  • Laser Induced Fluorescence
  • Lasers
  • Measurement
  • Mechanical Engineering
  • Picosecond Time
  • Standing Waves
  • Turbines
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Combustion science or combustion engineering.
  • Fluid Mechanics and Fluid Dynamics.
  • Optical Physics and Photonics.

Technology Areas

  • Directed Energy