Nitric Oxide and Temperature Measurement Using Laser Absorption Spectroscopy in Arc-Heater Plenum

Isabella Gessman; Gyu Sub Lee; Nozomu Kato; Tonghun Lee; Shruti Ghanekar; Keunsoo Kim; Jihyung Yoo

doi:10.2514/1.J064257

Nitric Oxide and Temperature Measurement Using Laser Absorption Spectroscopy in Arc-Heater Plenum

Isabella Gessman
, Gyu Sub Lee
, Nozomu Kato
, Tonghun Lee
, Shruti Ghanekar
, Keunsoo Kim
, Jihyung Yoo

Research output: Contribution to journal › Article › peer-review

Abstract

A mid-infrared tunable diode laser absorption spectroscopy (TDLAS) sensor to measure rovibrational temperature and nitric oxide (NO) mole fraction in the arc-heater plenum was developed and employed in the Arc Heated Combustion Tunnel-II (ACT-II) facility at the University of Illinois at Urbana-Champaign. From this study, TDLASinferred temperatures were found to differ from the conventional method to estimate temperature by over 13%. Chemical equilibrium simulations were performed at the TDLAS-inferred temperatures to understand how chemical relaxation timescales compare with plenum residence times. Results from this study show NO levels higher than equilibrium concentrations, with relaxation timescales that exceed plenum residence times. With insufficient time to reach equilibrium, elevated NO levels are expected to remain in the test gas and persist into the scramjet model.

Original language	English (US)
Pages (from-to)	336-343
Number of pages	8
Journal	AIAA journal
Volume	63
Issue number	1
DOIs	https://doi.org/10.2514/1.J064257
State	Published - Jan 2025

Keywords

Computational Modeling
Flow Conditions
Quantum Cascade Lasers
Scramjet Engines
Sensors
Thermodynamic Properties
Tunable Diode Laser Absorption Spectroscopy

ASJC Scopus subject areas

Aerospace Engineering

Online availability

10.2514/1.J064257

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title = "Nitric Oxide and Temperature Measurement Using Laser Absorption Spectroscopy in Arc-Heater Plenum",

abstract = "A mid-infrared tunable diode laser absorption spectroscopy (TDLAS) sensor to measure rovibrational temperature and nitric oxide (NO) mole fraction in the arc-heater plenum was developed and employed in the Arc Heated Combustion Tunnel-II (ACT-II) facility at the University of Illinois at Urbana-Champaign. From this study, TDLASinferred temperatures were found to differ from the conventional method to estimate temperature by over 13\%. Chemical equilibrium simulations were performed at the TDLAS-inferred temperatures to understand how chemical relaxation timescales compare with plenum residence times. Results from this study show NO levels higher than equilibrium concentrations, with relaxation timescales that exceed plenum residence times. With insufficient time to reach equilibrium, elevated NO levels are expected to remain in the test gas and persist into the scramjet model.",

keywords = "Computational Modeling, Flow Conditions, Quantum Cascade Lasers, Scramjet Engines, Sensors, Thermodynamic Properties, Tunable Diode Laser Absorption Spectroscopy",

author = "Isabella Gessman and Lee, \{Gyu Sub\} and Nozomu Kato and Tonghun Lee and Shruti Ghanekar and Keunsoo Kim and Jihyung Yoo",

note = "This work was supported by U.S. Air Force Office of Scientific Research grant FA9550-21-1-0072, monitored by Chiping Li; Office of Naval Research grant N00014-21-1-2475, monitored by Eric Marineau; and by the Department of Energy, National Nuclear Security Administration, under Award Number DE-NA0003963. The authors gratefully acknowledge these sources of support.",

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T1 - Nitric Oxide and Temperature Measurement Using Laser Absorption Spectroscopy in Arc-Heater Plenum

AU - Gessman, Isabella

AU - Lee, Gyu Sub

AU - Kato, Nozomu

AU - Lee, Tonghun

AU - Ghanekar, Shruti

AU - Kim, Keunsoo

AU - Yoo, Jihyung

N1 - This work was supported by U.S. Air Force Office of Scientific Research grant FA9550-21-1-0072, monitored by Chiping Li; Office of Naval Research grant N00014-21-1-2475, monitored by Eric Marineau; and by the Department of Energy, National Nuclear Security Administration, under Award Number DE-NA0003963. The authors gratefully acknowledge these sources of support.

PY - 2025/1

Y1 - 2025/1

N2 - A mid-infrared tunable diode laser absorption spectroscopy (TDLAS) sensor to measure rovibrational temperature and nitric oxide (NO) mole fraction in the arc-heater plenum was developed and employed in the Arc Heated Combustion Tunnel-II (ACT-II) facility at the University of Illinois at Urbana-Champaign. From this study, TDLASinferred temperatures were found to differ from the conventional method to estimate temperature by over 13%. Chemical equilibrium simulations were performed at the TDLAS-inferred temperatures to understand how chemical relaxation timescales compare with plenum residence times. Results from this study show NO levels higher than equilibrium concentrations, with relaxation timescales that exceed plenum residence times. With insufficient time to reach equilibrium, elevated NO levels are expected to remain in the test gas and persist into the scramjet model.

AB - A mid-infrared tunable diode laser absorption spectroscopy (TDLAS) sensor to measure rovibrational temperature and nitric oxide (NO) mole fraction in the arc-heater plenum was developed and employed in the Arc Heated Combustion Tunnel-II (ACT-II) facility at the University of Illinois at Urbana-Champaign. From this study, TDLASinferred temperatures were found to differ from the conventional method to estimate temperature by over 13%. Chemical equilibrium simulations were performed at the TDLAS-inferred temperatures to understand how chemical relaxation timescales compare with plenum residence times. Results from this study show NO levels higher than equilibrium concentrations, with relaxation timescales that exceed plenum residence times. With insufficient time to reach equilibrium, elevated NO levels are expected to remain in the test gas and persist into the scramjet model.

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KW - Scramjet Engines

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Nitric Oxide and Temperature Measurement Using Laser Absorption Spectroscopy in Arc-Heater Plenum

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