Rayleigh Scattering Measurements Using a Tunable Liquid Crystal Fabry-Perot Interferometer

Mielke-Fagan, Amy F.; Clem, Michelle M.; Elam, Kristie A.

doi:10.2514/6.2010-4350

Cited by 3 publications

(3 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[7][8][9][10] Then, IRS can be used for the non-contact measurement of flow velocity, flow temperature, and gas density. [11][12][13][14] Recently, many institutes have successfully used photomultiplier detectors to achieve RS signals. The Glenn Research Center of NASA reported that interferometric rings that corresponded to RS were imaged by using different photomultipliers, and the spectral profile and flow velocity were then acquired via complicated picture-processing arithmetic.…”

Section: Introductionmentioning

confidence: 99%

High sampling-rate measurement of turbulence velocity fluctuations in Mach 1.8 Laval jet using interferometric Rayleigh scattering

et al. 2017

View full text Add to dashboard Cite

Interferometric Rayleigh scattering diagnostic technique for the time-resolved measurement of flow velocity is studied. Theoretically, this systematic velocity-measured accuracy can reach up to 1.23 m/s. Measurement accuracy is then evaluated by comparing with hot wire anemometry results. Moreover, the distributions of velocity and turbulence intensity in a supersonic free jet from a Laval nozzle with a Mach number of 1.8 are also obtained quantitatively. The sampling rate in this measurement is determined to be approximately 10 kHz.

show abstract

Section: Introductionmentioning

confidence: 99%

High sampling-rate measurement of turbulence velocity fluctuations in Mach 1.8 Laval jet using interferometric Rayleigh scattering

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Other properties of the scattered light are related to further physical parameters. The broadening of the spectrum provides information about temperature, and the local flow velocity is related to the central frequency shift due to the Doppler effect [7][8][9].…”

mentioning

confidence: 99%

Density Fluctuations Measurement by Rayleigh Scattering Using a Single Photomultiplier

et al. 2018

View full text Add to dashboard Cite

“…7, enabling the Rayleigh and shifted reference fringes to be more accurately evaluated in the modeling of the fringe pattern. The theoretical model of the fringe pattern containing both reference laser light and Rayleigh scattered light has been developed and presented previously 14 . The Rayleigh spectrum in the model is evaluated using the TENTI S6 kinetic theory model 15,16 .…”

Section: Rayleigh Scattering and Fabry-perot Interferometrymentioning

confidence: 99%

Improvement in Rayleigh Scattering Measurement Accuracy

Fagan

Clem

Elam

2012

50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

Self Cite

View full text Add to dashboard Cite

[Abstract] Spectroscopic Rayleigh scattering is an established flow diagnostic that has the ability to provide simultaneous velocity, density, and temperature measurements. The Fabry-Perot interferometer or etalon is a commonly employed instrument for resolving the spectrum of molecular Rayleigh scattered light for the purpose of evaluating these flow properties. This paper investigates the use of an acousto-optic frequency shifting device to improve measurement accuracy in Rayleigh scattering experiments at the NASA Glenn Research Center. The frequency shifting device is used as a means of shifting the incident or reference laser frequency by 1100 MHz to avoid overlap of the Rayleigh and reference signal peaks in the interference pattern used to obtain the velocity, density, and temperature measurements, and also to calibrate the free spectral range of the Fabry-Perot etalon. The measurement accuracy improvement is evaluated by comparison of Rayleigh scattering measurements acquired with and without shifting of the reference signal frequency in a 10 mm diameter subsonic nozzle flow.

show abstract

Rayleigh Scattering Measurements Using a Tunable Liquid Crystal Fabry-Perot Interferometer

Cited by 3 publications

References 16 publications

High sampling-rate measurement of turbulence velocity fluctuations in Mach 1.8 Laval jet using interferometric Rayleigh scattering

High sampling-rate measurement of turbulence velocity fluctuations in Mach 1.8 Laval jet using interferometric Rayleigh scattering

Density Fluctuations Measurement by Rayleigh Scattering Using a Single Photomultiplier

Improvement in Rayleigh Scattering Measurement Accuracy

Contact Info

Product

Resources

About