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1、第５９卷第５期汽轮机技术Vol．５９No．５２０１７年１０月TURBINETECHNOLOGYOct．２０１７核电汽轮机高压级内非定常流动对自发凝结的影响曹丽华,商佳棋,李盼,李勇(东北电力大学能源与动力工程学院,吉林１３２０１２)摘要:为研究核电汽轮机高压级内非定常流动对湿蒸汽凝结流动液滴直径、压力以及湿汽损失等参数分布的影响,采用湿蒸汽非平衡凝结相变模型,对定常与非定常流动状态下湿蒸汽自发凝结流动进行三维数值分析。结果表明：非定常凝结流动趋于稳定时,各项参数的分布呈现周期性变化规律。非定常流动的动静干涉现象导致周向流场具有非均匀性,湿蒸汽级内的轴端功率下降０．２66%。
2、非定常流动过程中的静叶尾迹现象致使下游动叶通道内自发凝结的液滴直径减小。非定常凝结流动的压力位势作用使得动叶出口平均压力提高。非定常流动引起湿蒸汽凝结的热力学损失与制动损失分别升高6２．２７%和１．８８%,疏水损失降低０．２３３%。关键词:核电汽轮机;自发凝结;非定常流动;静叶尾迹;湿汽损失分类号:TK２6３文献标识码:A文章编号:１００１-５８８４(２０１７)０５-０３２１-０５TheEffectofUnsteadyFlowonSpontaneousCondensationinHighPressureStageofNuclearPowerTurbineCAOLi-hua,
3、SHANGJia-qi,LIPan,LIYong（SchoolofEnergyandPowerEngineering,NortheastElectricPowerUniversity,Jilin１３２０１２,China)Abstract：Inordertoresearchtheinfluenceofunsteadyflowinthehighpressurestageofnuclearsteamturbineonthedistributionofdropletdiameter,pressureandwetsteamlossofwetsteamcondensationflow,
4、threedimensionalnumericalanalysisisemployedinspontaneouscondensationflowofwetsteaminsteadyandunsteadyflowconditionsbynon-equilibriumcondensationphasetransitionmodelofwetsteam．Thecalculationresultsshowthatthedistributionoftheparametersoftheunsteadycondensingflowisperiodic,whentheunsteadycon
5、densingflowtendsstable．Therotor-statorinteractionphenomenonofunsteadyflowresultsinthenon-uniformityofthecircumferentialflowfield,andtheoutputpowerinthestageofwetsteamdecreases０．２66%．Spontaneouscondensationdropletdiameterisdecreasedbystatorwakephenomenonofunsteadyflowintheprocessofthedownst
6、reamrotorpassage．Theaveragepressureatoutletofrotorisincreasedbytheeffectofpressurepotentialofunsteadycondensationflow．Thethermodynamiclossandbrakelosscausedbyunsteadyflowareincreasedby6２．２７%and１．８８%,respectively,andthelossisreducedby０．２３３%．Keywords：nuclearsteamturbines;spontaneouscondensat
7、ion;unsteadyflow;statorwake;wetnessloss汽轮机非定常流动状态对自发凝结流动的影响,对保障核电０前言汽轮机组经济运行具有重要意义。国内外诸多学者对定常流动状态下的湿蒸汽自发凝结近年来,由于化石燃料消耗过度所引起的能源危机以及流动进行了深入研究。MarkusSchatz等[５]通过搭建低压汽日益严重的环境污染问题,使得核电成为电力行业发展的主轮机末级凝结流动的试验台测量得出液滴尺寸分布谱;要趋势。汽轮机是核能发电中重要的能量转化装置,蒸汽发HamedBagheri-Esfe等[6]
