Advanced Laser-Based Techniques for Gas-Phase Diagnostics in Combustion and Aerospace Engineering

Andreas Ehn, Jiajian Zhu, Xuesong Li, Johannes Kiefer*

*Corresponding author for this work

Research output: Contribution to journalReview article

21 Citations (Scopus)

Abstract

Gaining information of species, temperature, and velocity distributions in turbulent combustion and high-speed reactive flows is challenging, particularly for conducting measurements without influencing the experimental object itself. The use of optical and spectroscopic techniques, and in particular laser-based diagnostics, has shown outstanding abilities for performing non-intrusive in situ diagnostics. The development of instrumentation, such as robust lasers with high pulse energy, ultra-short pulse duration, and high repetition rate along with digitized cameras exhibiting high sensitivity, large dynamic range, and frame rates on the order of MHz, has opened up for temporally and spatially resolved volumetric measurements of extreme dynamics and complexities. The aim of this article is to present selected important laser-based techniques for gas-phase diagnostics focusing on their applications in combustion and aerospace engineering. Applicable laser-based techniques for investigations of turbulent flows and combustion such as planar laser-induced fluorescence, Raman and Rayleigh scattering, coherent anti-Stokes Raman scattering, laser-induced grating scattering, particle image velocimetry, laser Doppler anemometry, and tomographic imaging are reviewed and described with some background physics. In addition, demands on instrumentation are further discussed to give insight in the possibilities that are offered by laser flow diagnostics.

Original languageEnglish
Pages (from-to)341-366
Number of pages26
JournalApplied Spectroscopy
Volume71
Issue number3
Early online date3 Feb 2017
DOIs
Publication statusPublished - Mar 2017

Keywords

  • Aerospace engineering
  • combustion diagnostics
  • turbulent flows
  • applied diagnostics
  • STOKES-RAMAN SCATTERING
  • PARTICLE IMAGE VELOCIMETRY
  • INDUCED GRATING EXPERIMENTS
  • INDUCED ELECTROSTRICTIVE GRATINGS
  • INDUCED-FLUORESCENCE TECHNIQUES
  • OPTICAL PARAMETRIC OSCILLATOR
  • INDUCED THERMAL ACOUSTICS
  • TURBINE MODEL COMBUSTOR
  • SINGLE-SHOT THERMOMETRY
  • COUPLED-DEVICE CAMERA

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