Monitoring Temperature in High Enthalpy Arc-heated Plasma Flows using Tunable Diode Laser Absorption Spectroscopy

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Monitoring Temperature in High Enthalpy Arc-heated Plasma Flows using Tunable Diode Laser Absorption Spectroscopy

Martin, Marcel Nations / Chang, Leyen S. / Jeffries, Jay B. / Hanson, Ronald K. / Nawaz, Anuscheh / Taunk, Jaswinder S. / Driver, David M. / Raiche, George

Abstract

A tunable diode laser sensor was designed for in situ monitoring of temperature in the arc heater of the NASA Ames IHF arcjet facility (60 MW). An external cavity diode laser was used to generate light at 777.2 nm and laser absorption used to monitor the population of electronically excited oxygen atoms in an air plasma flow. Under the assumption of thermochemical equilibrium, time-resolved temperature measurements were obtained on four lines-of-sight, which enabled evaluation of the temperature uniformity in the plasma column for different arcjet operating conditions.

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Document information

Title :

Monitoring Temperature in High Enthalpy Arc-heated Plasma Flows using Tunable Diode Laser Absorption Spectroscopy

Contributors:

Martin, Marcel Nations (author) / Chang, Leyen S. (author) / Jeffries, Jay B. (author) / Hanson, Ronald K. (author) / Nawaz, Anuscheh (author) / Taunk, Jaswinder S. (author) / Driver, David M. (author) / Raiche, George (author)

Conference:

AIAA Fluid Dynamics and Co-located Conferences and Exhibit ; 2013 ; San Diego, CA, United States

Publication date :

2013-06-24

Type of media :

Conference paper

Type of material :

No indication

Language :

English

Keywords :

Research And Support Facilities (Air)