Wavelength-modulation Spectroscopy for Determination of Gas Properties in Hostile Environments
Author | : Christopher S. Goldenstein |
Publisher | : |
Total Pages | : |
Release | : 2014 |
ISBN-10 | : OCLC:887992728 |
ISBN-13 | : |
Rating | : 4/5 (28 Downloads) |
Download or read book Wavelength-modulation Spectroscopy for Determination of Gas Properties in Hostile Environments written by Christopher S. Goldenstein and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past 40 years, tunable diode laser absorption spectroscopy (TDLAS) sensors have matured into a practical technology for providing non-intrusive, in-situ measurements of gas properties in a number of hostile energy systems. However, the applicability of TDLAS sensors has been limited by a number of fundamental measurement challenges including: beam-steering, non-absorbing transmission losses, interfering emission, line-of-sight non-uniformities, and broad and blended absorption spectra at high pressures. This work presents the development and demonstration of several novel calibration-free wavelength-modulation spectroscopy (WMS) techniques and sensors that enable high-fidelity measurements of gas properties in highly non-uniform gases and high-pressure gases. These WMS techniques are demonstrated with measurements of gas temperature, H2O, pressure, and velocity in two model scramjet combustors and a pulse detonation combustor.