Title :
Laser-2-Focus data analysis using a nonlinear regression model
Author_Institution :
Inst. fur Antriebstech., Deutsche Forschungsanstalt fur Luft- und Raunfahrt (DLR) e.V., Koln, Germany
Abstract :
A new approach to determine the first and second order flow field statistics from Laser-2-Focus (or Laser Transit) anemometer measurement was developed. It is based on non-linear regression fits of the probability density function to the measured data. The main advantages to previous methods are enhanced noise handling capabilities, reduced measuring time and better treatment of measurements with high turbulence levels. The new method was compared to artificially generated L2F data with known flow parameters and applied to actual measurements
Keywords :
anemometers; curve fitting; data analysis; flow measurement; laser velocimetry; statistical analysis; turbulence; L2F data; Laser-2-Focus data analysis; anemometer measurement; enhanced noise handling capabilities; flow field statistics; flow parameters; flow velocity measurement; measuring time; nonlinear regression model; probability density function; turbulence levels; Data analysis; Density measurement; Fluid flow measurement; Laser modes; Laser noise; Noise measurement; Noise reduction; Probability density function; Statistics; Time measurement;
Conference_Titel :
Instrumentation in Aerospace Simulation Facilities, 1995. ICIASF '95 Record., International Congress on
Conference_Location :
Wright-Patterson AFB, OH
Print_ISBN :
0-7803-2088-3
DOI :
10.1109/ICIASF.1995.519128
