NASA NTRS · 20150003385
Fluid Properties Measurements Using Wavelength Modulation Spectroscopy with First Harmonic Detection
Abstract
An apparatus and method for monitoring gas velocity, temperature, and pressure in combustion systems and flow devices, in particular at inlets and isolators of scramjet engines. The invention employs wavelength modulation spectroscopy with first harmonic detection and without the need to scan the full absorption spectra.
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Chen, Shin-Juh, Silver, Joel A.. 2014-11-25. Fluid Properties Measurements Using Wavelength Modulation Spectroscopy with First Harmonic Detection. https://ntrs.nasa.gov/citations/20150003385
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