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Diode laser absorption spectroscopy of water vapor in a scramjet combustor

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Date

2005

Authors

Griffiths, Alan D.
Houwing, A. Frank P.

Journal Title

Journal ISSN

Volume Title

Publisher

Optical Society of America

Abstract

A sensor based on tunable diode laser absorption spectroscopy was constructed for time-resolved temperature and water vapor concentration measurements in a scramjet combustor. The sensor probed two absorption lines near 1390 nm with two time-multiplexed lasers used to measure temperature and water vapor concentration at up to 20 kHz. A demonstration experiment was performed in the supersonic, expanding exhaust region of the combustor, showing the measurement to be repeatable, able to resolve temporal trends during tunnel operation, and sensitive to changes in combustor operating conditions.

Description

Keywords

Keywords: Scramjet combustors; Time-multiplexed lasers; Absorption spectroscopy; Combustors; Thermal effects; Vapors; Semiconductor lasers

Citation

URI

http://hdl.handle.net/1885/101498

Collections

ANU Research Publications

Source

Applied Optics

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1364/AO.44.006653

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