Measurements of low concentration hydrocarbons at elevated temperatures and pressures using supercontinuum laser absorption spectroscopy

Michael Halloran, Nicholas Traina, Tonghun Lee, Jihyung Yoo

Research output: Contribution to conferencePaperpeer-review

Abstract

High-speed speciation of simple hydrocarbon fuels at small concentrations is demonstrated using near-infrared supercontinuum laser absorption spectroscopy (SCLAS). Absorption-based diagnostics, particularly when combined with optical fiber components, have significantly enhanced and enabled novel measurements of combustion phenomena. However, most techniques are subject to limitations prohibiting optimal measurements under advanced combustion regimes. SCLAS is a novel laser-based diagnostic technique that has been shown to overcome the aforementioned limitations and provide accurate, quantitative, and high-speed concentration measurements for various reacting flow environments. In this study, an SC laser is used to probe small concentrations of simple hydrocarbon species at elevated pressures and temperatures. Absorption spectra of CH4 and C2H2 were measured at various concentrations, pressures, and temperatures and statistically analyzed to determine the accuracy and sensitivity of the diagnostic strategy. Experimental results agreed well with models generated using the HITRAN database.

Original languageEnglish (US)
StatePublished - 2017
Event10th U.S. National Combustion Meeting - College Park, United States
Duration: Apr 23 2017Apr 26 2017

Other

Other10th U.S. National Combustion Meeting
CountryUnited States
CityCollege Park
Period4/23/174/26/17

Keywords

  • Absorption diagnostics
  • Hydrocarbons
  • Supercontinuum

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physical and Theoretical Chemistry
  • Mechanical Engineering

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