基于吸收光谱技术重建高温气体二维温度、浓度场的分析

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1、万方数据●__-_________________________________________________--●●_。。-______-__________________●_________________●。。。。。---_●_●-______。。。。。。。。。。。。。。。。。。———————————————————⋯fieldisretrievedbasedonsimulatedannealingalgorithm．Thenalgebraicreconstructionalgorithmisusedtosolvelinearequationsonconcen

2、tration，thuswehaveachieved2Dreconstructionoftemperatureandconcentrationfields．Basedonsimulatedannealingalgorithm，thenonlinearprojectionequationswereoptimizedandsolved．Byadjustingtheprojectionvalueerrortermandtheterm’Sweightsintheoptimizationobjectivefunction，2Dtemperatureandconcentrationd

3、istributionsareretrievedsimultaneously．ThestabilityofreconstructionmethodoftwodifferentprojectionvalueWasvalidatedwiththeprojectivereconstructionofcontainingrandomnoise．BasedontheideaofincreasingspectralinformationandreducingthespatialprojectionpositionincludedinHyperspectralTomography．Th

4、ecalibration—freewavelengthmodulationtechniquesr．

5、whichtakeadvantageofpeakvalueofthenormalizedsecondharmonicsignalafterdigitallockandlow-passfilteringasprojectionvalues．areutilizedtOreconstructt11e2Dtemperatureandconcentrationmodel．Thescanningsignalsoftherespectiveabsorptionlinesaresuperi

6、mposedbyhigh-frequencysignalwithdifferentmodulationfrequenciesinordertOmakeagreaterdifferencebetweentheprojectionvalueofabsorptionlines．Calculatedprojectionvalueofthepresettemperatureandconcentrationfieldsareviewedassimulatedmeasurementvalue，andthenthepresetfieldsarereconstructedwithregul

7、arizationinformationsimultaneously．Keywords：tunablediodelaserabsorptionspectroscopy；tomography；combustion；temperature；ConcentrationfieldIII万方数据主要符号表缩写TDLAS可调谐半导体激光吸收光谱(TunableDiodeLaserAbsorptionSpectroscopy)CT计算机层析成像技术(ComputedTomography)TDLAT可调谐半导体激光吸收层析成像术(TunableDiodeLaserAbsorptionTo

8、mography)T1TRAN高分辨率透射分子吸收数据库一．(HighresolutionTransmissionmolecularabsorptiondatabase)HITEMP高温光谱数据库(rnghTemperaturespectroscopicparameters)VCSEL垂直腔面发射激光器(VerticalCavitySurfaceEmittingLaser)DFB分布反馈式(DistributedFeedBack)CCD电荷耦合器件(ChargeCoupleDevice)LIF激光诱导荧光(LaserInduc