Analysis of a Tomography Technique for a Scramjet Wind Tunnel
- Resource Type
- Authors
- Glenn S. Diskin; Christopher P. Goyne; Elizabeth F. Martin
- Source
- International Journal of Hypersonics. 1:173-180
- Subject
- Engineering
Data collection
Meteorology
business.industry
Combustion
Optics
Supersonic speed
Scramjet
Tomography
Absorption (electromagnetic radiation)
business
Physics::Atmospheric and Oceanic Physics
Tunable laser
Wind tunnel
- Language
- ISSN
- 1759-3107
An experimental activity is currently underway to develop a tunable diode laser absorption tomography (TDLAT) technique to measure flow properties in a supersonic combustion wind tunnel. The present study simulates the reconstruction of spectroscopic measurements to determine the effects of data collection geometry and ambient water vapor on reconstruction accuracy. The study also proposes a way to remove the effects of ambient water vapor absorption. Overall, results show that TDLAT data collection time can be significantly reduced while maintaining reconstruction accuracy by taking fewer projections with a high density of rays and by correcting for ambient water vapor absorption.