水平矩形小通道内气-液两相流摩擦压降的研究  

FRICTIONAL PRESSURE DROP OF GAS-LIQUID TWO-PHASE FLOW IN SMALL HORIZONTAL RECTANGULAR CHANNELS

作　　者：李卓[1] 俞坚[1] 夏国栋[1] 马重芳[1] 

机构地区：[1]传热强化与过程节能教育部重点实验室及传热与能源利用北京市重点实验室,北京工业大学,北京100022

出　　处：《工程热物理学报》2006年第z1期185-188,共4页Journal of Engineering Thermophysics

基　　金：国家重点基础研究发展规划(973)项目(No.G2000026300)

摘　　要：本文以氮气和水为工质,在水平矩形小通道(d_h=0.99mm)中对两相流摩擦压降进行了实验研究.实验是在大气压力下进行的,氮气的折算流速的范围为0.017～33.3m/s,水的折算流速的范围为0.1～5m/s.实验对所得的219个数据点进行了分析,并同L&M关系式、L&L关系式、均相流模型以及均相流修正模型进行了比较,得出:(1)L&M关系式比均相流模型、均相流修正模型以及L&L关系式的偏差都小,能更好地预测两相流压降变化.(2)L&M关系式中的C在不同的流型(流型是由U_(GS)、U_(LS)以及d_h决定)具有不同的值,在同一U_(LS)下,C随X(U_(GS))的变化呈现一定的规律性,在X=7左右,C出现最大值,而此处恰好是块状流最激烈区域.但是C随U_(LS)没有一定的规律性.Two-phase frictional pressure drop and flow regimes in small channels were experimentally investigated.Using nitrogen and water,experiments were conducted in small horizontal rectangular channels with 0.99 mm inner diameter.The gas and liquid superficial velocity ranges were 0.017～33.3 and 0.1～5 m/s,respectively.The atmospheric pressure condition was maintained throughout the experiments.There are two conclusions:(1)Comparisons between the experimental data and the predictions indicate that the L & M model shows a better predictive ability than the other empirical correlations.(2)In the case of the same ULS,the parameter C shows a regular relation with parameter X(U_(GS))and reaches a maximal value at X=7,where churn flow existed.But there is no regular relation between C and U_(LS).

关 键 词：小通道 气-液两相流 摩擦压降 

分 类 号：TK124[动力工程及工程热物理—工程热物理]