Title :
Comparison of laser transit anemometry data analysis techniques
Author :
Humphreys, William M., Jr. ; Gartrell, Luther R.
Author_Institution :
NASA Langley Res. Center, Hampton, VA, USA
Abstract :
Two techniques for the extraction of two-dimensional flow information from laser transit anemometry (LTA) data sets are presented and compared via a simulation study and experimental investigation. The methods are a probability density function (PDF) estimation technique and a marginal distribution analysis technique. The simulation study builds on the results of previous work and provides a quantification of the accuracy of both techniques for various LTA data acquisition scenarios. The experimental comparison consists of using an LTA system to survey the flow downstream of a turbulence generator in a small low-speed wind tunnel. The collected data sets are analyzed and compared
Keywords :
aerospace simulation; anemometry; data acquisition; data analysis; flow measurement; flow simulation; laser velocimetry; probability; wind tunnels; Monte Carlo method; correlogram; data acquisition; estimation; laser transit anemometry; low-speed wind tunnel; marginal distribution analysis; probability density function; simulation; turbulence generator; two-dimensional flow; Data acquisition; Data analysis; Data mining; Laser beams; Measurement standards; NASA; Particle beams; Particle measurements; Probability density function; Velocity measurement;
Conference_Titel :
Instrumentation in Aerospace Simulation Facilities, 1991. ICIASF '91 Record., International Congress on
Conference_Location :
Rockville, MD
DOI :
10.1109/ICIASF.1991.186257
