Methods to improve pressure, temperature and velocity accuracies of filtered Rayleigh scattering measurements in gaseous flows

被引：22

作者：

Doll, Ulrich ^{[1
]}

Burow, Eike ^{[1
]}

Stockhausen, Guido ^{[1
]}

Willert, Christian ^{[1
]}

机构：

[1] German Aerosp Ctr DLR, Inst Prop Technol, Measurement Technol, D-51147 Cologne, Germany

来源：

MEASUREMENT SCIENCE AND TECHNOLOGY | 2016年 / 27卷 / 12期

关键词：

Rayleigh scattering; molecular filter; simultaneous measurement; analytical lineshape model; gaseous flow; frequency scanning; background correction; BRILLOUIN SCATTERING; AIR; PROFILES; MODEL;

D O I：

10.1088/0957-0233/27/12/125204

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Frequency scanning filtered Rayleigh scattering is able to simultaneously provide time-averaged measurements of pressure, temperature and velocity in gaseous flows. By extending the underlying mathematical model, a robust alternative to existing approaches is introduced. Present and proposed model functions are then characterized during a detailed uncertainty analysis. Deviations between the analytical solution of a jet flow experiment and measured results could be related to laser-induced background radiation as well as the Rayleigh scattering's spectral distribution. In applying a background correction method and by replacing the standard lineshape model by an empirical formulation, detrimental effects on pressure, temperature and velocity accuracies could be reduced below 15 Pa, 2.5K and 2.7 m s(-1).

引用

页数：9

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