Pulsed Doppler Lidar wind profile measurement process in complex terrain

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Pulsed Doppler Lidar wind profile measurement process in complex terrain. Matthieu Boquet , Bruno Ribstein , Rmy Parmentier, Jean-Pierre Cariou LEOSPHERE SAS Centre Scientifique dOrsay - France. Agenda. Pulsed Lidar volume measurement principle Simple & complex terrain - PowerPoint PPT Presentation

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<p>Diapositive 1</p> <p>Pulsed Doppler Lidar wind profilemeasurement process in complex terrainMatthieu Boquet, Bruno Ribstein, Rmy Parmentier, Jean-Pierre CariouLEOSPHERE SAS Centre Scientifique dOrsay - France23/06/2009 CLRC 2009Lidar measurement in complex terrainN1AgendaPulsed Lidar volume measurement principleSimple &amp; complex terrainCFD modeling exampleOptimizationConclusions23/06/09 CLRC 2009Lidar measurement in complex terrainNPulsed Lidar principleHow Does the WindCubeTM retrieve wind Velocity vertical profiles?23/06/09 CLRC 2009Lidar measurement in complex terrainN3Volume measurementRadial velocity along a LOSPulse FWHM probed sample</p> <p>Conically scanningdc=height*tan</p> <p>Sequentially scanning4sec complete rotation</p> <p>avs = v.cos(a)qLaser shooting directionaerosols23/06/09 CLRC 2009Lidar measurement in complex terrainNWind velocity vertical profile4 radial velocities 3 wind velocity components</p> <p>Hypothesis:Same wind inside the probed volumeSame wind at the 4 probed domainsStationary atmosphere</p> <p>Comparison with anemometers point measurement</p> <p>23/06/09 CLRC 2009Lidar measurement in complex terrainNTerrain influenceHow WELL DOES the WindCubeTM retrieve wind Velocity vertical profiles?23/06/09 CLRC 2009Lidar measurement in complex terrainN6Flat terrain</p> <p>Inferior to 1% relative difference between Lidar and cup anemometer23/06/09 CLRC 2009Lidar measurement in complex terrainNForested area and gentle slope </p> <p>WindCubeTMForestTerrain slope over 10</p> <p>About -2% relative difference between Lidar and sonic anemometer23/06/09 CLRC 2009Lidar measurement in complex terrainN8Mountainous terrain</p> <p>About -5% relative difference between Lidar and cup anemometer</p> <p>23/06/09 CLRC 2009Lidar measurement in complex terrainNCFD Modeling analysisUSING a cfd modeling of a complex terrain to better understand the lidar and anemometer differences?23/06/09 CLRC 2009Lidar measurement in complex terrainN10CFD modelingMERCURE/Aria Technologies softwareAdapted to complex topographyFine meshing2x2x1km box~10x10x5m cellsStationary not a time variation studyFair enough to study Lidar wind velocity retrieval process under various local complex flowMatLab analysisLidar measurement process simulation23/06/09 CLRC 2009Lidar measurement in complex terrainNSpanish site</p> <p>Met mastWindCube</p> <p>North-West windNorth-West wind23/06/09 CLRC 2009Lidar measurement in complex terrainN</p> <p>Wind distribution at 80m heightNorth-west wind23/06/09 CLRC 2009Lidar measurement in complex terrainN</p> <p>Overestimation&gt;5%Underestimation</p>

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