Measurement of Rayleigh-Brillouin spectra in gas flows

Tao Li; Lei Wu; Liang Yuan; Hongru Yang; Gaoping Li; Chunlian Zhan; Yan Li; Fei Lu

doi:10.1117/12.2077142

19 February 2015 Measurement of Rayleigh-Brillouin spectra in gas flows

Tao Li, Lei Wu, Liang Yuan, Hongru Yang, Gaoping Li, Chunlian Zhan, Yan Li, Fei Lu

Proceedings Volume 9449, The International Conference on Photonics and Optical Engineering (icPOE 2014); 944930 (2015) https://doi.org/10.1117/12.2077142
Event: The International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference (icPOE 2014), 2014, Xi'an, China

Abstract

Laser Rayleigh-Brillouin scattering is an effective non-intrusive method for measurement of density, temperature and pressure in gas flows. In theory, the power of Rayleigh-Brillouin scattered laser light is proportional to the gas density, the full width at half maximum (FWHM) and the Brillouin shift of the Rayleigh-Brillouin scattering spectrum is related to the gas temperature and pressure, respectively. In this paper, a measurement device based on Fabry-Perot interferometer (FPI) is designed to measure the Rayleigh-Brillouin spectrum of nitrogen gas. The experimental data is obtained at different pressures under room temperature conditions. The L3 model is used to fit the experimental data to obtain the FWHMs and Brillouin shifts of the Rayleigh-Brillouin profiles. The composite Rayleigh-Brillouin profiles which consist of Rayleigh peak, stokes peak and anti-stokes peak are represented by three distinct peaks of Lorentz functions. Fitting results show that the error of FWHMs and Brillouin shifts obtained by L3 model is less than 10% compare with the Tenti S6 model. Some factors that affect the measurement accuracy of the Rayleigh-Brillouin parameters are also analyzed and discussed.

Citation Download Citation

Tao Li, Lei Wu, Liang Yuan, Hongru Yang, Gaoping Li, Chunlian Zhan, Yan Li, and Fei Lu "Measurement of Rayleigh-Brillouin spectra in gas flows", Proc. SPIE 9449, The International Conference on Photonics and Optical Engineering (icPOE 2014), 944930 (19 February 2015); https://doi.org/10.1117/12.2077142

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available