Mid-infrared Laser Absorption Diagnostics for Detonation Studies

  • R. M. Spearrin
  • C. S. Goldenstein
  • J. B. Jeffries
  • R. K. Hanson
Conference paper

Abstract

Detonation-based engines represent a challenging application for diagnostics due to the wide range of thermodynamic conditions involved (T~500-3000 K, P~2-60 atm) and the short time scales of change (~10− 6 to 10− 4 sec) associated with such systems. Non-intrusive laser absorption diagnostics can provide high time-resolution and have been employed extensively in shock tube kinetics experiments (P~1-20 atm), offering high potential for application in detonation environments with modest utilization to date [1-4]. Limiting factors in designing effective tunable laser absorption sensors for detonation engines can be divided into two sets of challenges: high-pressure, high-temperature absorption spectroscopy and harsh thermo-mechanical environments. The present work, conducted in a high-pressure shock tube and operating detonation combustor, addresses both sets of difficulties, with the objective of developing time-resolved, in-situ temperature and concentration sensors for detonation studies.

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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • R. M. Spearrin
    • 1
  • C. S. Goldenstein
    • 1
  • J. B. Jeffries
    • 1
  • R. K. Hanson
    • 1
  1. 1.High Temperature Gasdynamics LaboratoryStanford UniversityStanfordUSA

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