管道系统中局部阻力计算

管道系统中局部阻力计算王桂秋吉林化学工业公司化肥厂　吉林省吉林市　132021　　【摘要】管道系统中局部阻力的计算有几种方法,通常采用当量长度法和阻力系数法。由于流体在管件、阀门内的层流或湍流的性质与直管内层流或湍流的性质不同,当量长度法估算管件阻力降不够精确,而且阻力降与雷诺数及管件尺寸有关,单常数阻力系数法也不够精确,3-K方程能更准确地计算出管件的阻力降。关键词:管道　局部阻力　损失系数　摩擦系数　计算CalculationofLocalResistanceForceinPipelineSystemWangGuiqiuChemicalFertilizerPlant,JilingChemicalIndrustryCo.JilinJilin132021　　Abstract:Therearemanycalculatingmethodsforthelocalresistanceforeeinthepipelinesystem,butitisusedundernormalconditionstheequivalentlengthmethodandtheresistaneecoefficientmethodBecausethelaminalorturbulantproperryofthefluidinthepipefttingsandvalvesisdiffeventfromthatinstraightpipeiftheequiralentlengthmethodwouldtheresistancerelicfofthepipefittingsbenataceurateevalatedandtheresistancereliefisdependedontheReynoldscoeficientandthepipefittingssizes,thenthesingleconstantresistancemethodisnotaccurateenoughtoo.Itispointedoutthe3K-equationcanmoreaccuratecalculatetheresistancereliefinpipefittings.KeyWords:Pipline,LocalResistaaceeForce,LossCoefficient,FrictionCoefficien