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Development of a fs/ps CARS System for Temperature Measurements in Supersonic and Hypersonic EnvironmentsA hybrid femtosecond/picosecond coherent anti-Stokes Raman scattering (fs/ps CARS) system was developed for quantitative measurements of temperature in a laboratory-scale supersonic jet facility. Measurements were recorded at low pressures and densities relevant for supersonic and hypersonic environments, with special interest in exploring the feasibility of deploying this technique in the 20-inch Mach 6 and 31-inch Mach 10 wind tunnels located at NASA Langley Research Center. Modifications to the existing supersonic jet facility were made to simulate a test section with a width of 31 inches, so that the size of the test section is relevant for either wind tunnel. The CARS system was designed such that a similar beam geometry can be used in the laboratory to acquire point-based fs/ps CARS measurements along two axes of translation. Rotational Raman transitions of O2 and N2 were targeted.
Document ID
20230018566
Acquisition Source
Langley Research Center
Document Type
Presentation
Authors
Anna Stevenson
(University of Virginia Charlottesville, Virginia, United States)
Chloe E Dedic
(University of Virginia Charlottesville, Virginia, United States)
Neil S Rodrigues
(Langley Research Center Hampton, Virginia, United States)
Paul M Danehy
(Langley Research Center Hampton, Virginia, United States)
Date Acquired
December 21, 2023
Subject Category
Instrumentation and Photography
Meeting Information
Meeting: AIAA SciTech Forum and Exposition
Location: Orlando, FL
Country: US
Start Date: January 8, 2024
End Date: January 12, 2024
Sponsors: American Institute of Aeronautics and Astronautics
Funding Number(s)
WBS: 335803.04.22.23.10
Distribution Limits
Public
Copyright
Portions of document may include copyright protected material.
Technical Review
NASA Peer Committee
Keywords
CARS
Raman Scattering
Supersonic
Hypersonic
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