Mid-Ir Laser Absorption Spectroscopy Measurements of Temperature and Carbon Monoxide in a Rotating Detonation Rocket Engine
Abstract
Laser absorption spectroscopy has enabled fast and precise diagnostics for measuring gas conditions in a wide variety of applications. This thesis presents a high-speed mid-IR LAS diagnostic for CO and demonstrates its capabilities by taking measurements inside the annulus of a rotation detonation rocket engine. This scanned direct absorption diagnostic utilizes a quantum cascade laser to interrogate CO absorption lines near 2008.5 cm-1 to measure temperature, pressure, and CO at 750 kHz. This diagnostic reports precise measurements (95% CI of < 10%) even at elevated temperatures (2500 K) and pressures (6 atm). The presented diagnostic is the first of its kind to permit mid-infrared measurement of CO inside an RDRE annulus at repetition rates > 100 kHz.
Degree
M.Sc.
Advisors
Goldenstein, Purdue University.
Subject Area
Energy|Analytical chemistry|Chemistry|Electrical engineering|Electromagnetics|Optics|Physics
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