Keywords

absorption spectroscopy, shock tube, nitric oxide

Abstract

This work presents scanned-wavelength laser absorption spectroscopy (SWLAS) measurements of nitric oxide (NO) performed in the University of Central Florida shock tube to characterize absorption transitions relevant to high-temperature gas diagnostics. A tunable quantum cascade laser was used to probe two NO transitions near 1939.61 and 1939.79 cm-1 under reflected-shock conditions over temperatures ranging from 1200–2400 K. The experiments were conducted to investigate line-shape behavior, absorption strength, and the feasibility of using these transitions for temperature and species concentration measurements in high-enthalpy flows. Measured absorbance spectra were compared with predictions from the HITEMP database to assess the accuracy of available spectroscopic parameters under the tested conditions. These measurements establish the temperature dependence and signal characteristics of the selected NO features and provide a validated diagnostic framework for future laser absorption measurements in high-temperature experimental facilities.

Completion Date

2026

Semester

Spring

Committee Chair

Vasu, Subith

Degree

Master of Science in Aerospace Engineering (M.S.A.E.)

College

College of Engineering and Computer Science

Department

Mechanical and Aerospace Department

Format

PDF

Document Type

Thesis

Identifier

DP0053283

Release Date

5-15-2027

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Available for download on Saturday, May 15, 2027

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