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1、弄DOI：10．3969／j．issn．1009-9492．2015．O1．006旋流燃燒器空氣流場特性CFD數(shù)值模擬母楊培凱，莊智勇，陳偉博(1．廣東江聯(lián)能源環(huán)保有限公司，廣東廣州510640；2．華南理工大學(xué)機(jī)械與汽車工程學(xué)院，廣東廣州510640)摘要：一二次風(fēng)配風(fēng)比及其流動特性決定燃燒過程氧氣供應(yīng)，對旋流燃燒器燃燒質(zhì)量有著決定性的影響。旋流燃燒器內(nèi)部結(jié)構(gòu)設(shè)計、各部件布局、二次風(fēng)門開度都會影響一二次風(fēng)配風(fēng)比及其流動特性。CFD技術(shù)因成本低、周期短，能直觀全面了解流場分布情況而在燃燒流動領(lǐng)域研究被廣泛應(yīng)用，故采用Fluent對燃燒器
2、空氣流場情況進(jìn)行數(shù)值模擬和分析，研究不同二次風(fēng)門開度下旋流燃燒器空氣流場特性。結(jié)果表明，壓力最大區(qū)域主要分布在空氣人口處到二次風(fēng)門間、一次風(fēng)管人口附近區(qū)域，隨二次風(fēng)門開度增大二次風(fēng)門內(nèi)部空氣流速逐漸增大，整體平均空氣壓力、空氣旋流強(qiáng)度、旋轉(zhuǎn)氣流存在區(qū)域不斷減小，負(fù)壓區(qū)存在于旋流器前端到燃燒器空氣出口之間區(qū)域，維持火焰穩(wěn)定，對燃燒器結(jié)構(gòu)設(shè)計和實際應(yīng)用起到重要指導(dǎo)作用。關(guān)鍵詞：旋流燃燒器；空氣流場；CFD；湍流；數(shù)值模擬中圖分類號：TP391．77文獻(xiàn)標(biāo)識碼：A文章編號：1009—9492(2015101—0023一o6NumericalS
3、imulationofAirFlowofTurbulentBumerBased0nFEAYANGPei—kai，ZHUANGZhi—yong，CHENWei—bo(1．GuangdongJianglianEnergyEnvironmentalProtectionCo．，Ltd．，Guangzhou510640，China；2．SchoolofMechanical＆AutomotiveEngineering，SouthChinaUniversityofTechnology，Guangzhou510640，China)Abstract：Th
4、eprimarytosecondaryairratioandcharacteristicofairflowdeterminetheoxygensupplyduringthecombustionprocessandhaveadecisiveimpactonthecombustionqualityofturbulentbume~．Allthedesignsofinnerstructure，distributionsofeverycomponentandopeningdegreesofsecondaryairdoorinfluencethep
5、rimarytosecondaryairratioandcharacteristicofairflow．CFDtechnologyiswildlyusedintheresearchofcombustionandflowsinceitslowcostandshortcycleandvisualizedacquaintanceofthewholeflowdistribution．Theflowsituationoftheturbulentburnerisnumericalsimulatedandanalyzed．Andthecharacte
6、risticsofairflowatdifferentopeningdegreesofsecondaryairdoorarestudied．Theresultsshowthatarea8fromtheairinlettothesecondaryairdoorandareasneartheinletofprimaryairtubehavethemaximumpressure．Astheopeningdegreeofsecondaryairdoorincreases，theaverageairpressureandswirlinginten
7、sityandregionofswirlingflowdecreasebutthevelocityinsidethesecondaryairdoorincreases．Theareaofnegativepressurewhichstabilizestheflameexistsbetweenswirlerandtheairoutletoftheburner．Theconclusionsplayanimportantroleinguidingthestructuredesignandpracticalapplicationofburners
8、．Keywords：turbulentburner；airflowfield；CFD；turbulence；numericalsimulation0引言氣供應(yīng)不足或不理想，可能是由于總進(jìn)風(fēng)量不足將燃料與空氣
