水平管内油气水三相流分流型阻力特性实验研究

对水平管内油气水三相流的摩擦阻力压降特性进行了实验研究,水平管实验段由有机玻璃管制成,内径为40mm,所用的实验工质为:46#机械油,自来水和空气。油、气、水三相的折算速度范围分别为:0.05-0.51m／s、0.05-1.51m／s、0.02-50.6 m／s。按照气液界面总体特征将水平管内油气水三相流的流型分为泡状流、间歇流(段塞流和弹状流)、分层流及环状流。对各种典型流型下的摩擦阻力压降应用改进的Chisholm关系式及油水两相压降关系式进行分析,对Chisholm关系式中的参数C进行了重新定义。发现改进的Chisholm关系式能够较好地对管内油气水三相摩阻压降进行预测,因此改进Chisholm关系式可以作为摩擦压降计算的通用关系式。

EXPERIMENTAL STUDY ON PRESSURE GRADIENT FOR OIL-AIR WATER THREE-PHASE FLOW BY MEANS OF A FLOW REGIME SPECIFIC MODEL THROUGH HORIZONTAL PIPES

Experimental studies on characteristics of pressure drop for oil-air-water three-phase flow in horizontal pipes were conducted.The horizontal test section is made of 40 mm inner diameter plexglas pipe. No.46 mechanical oil,air and tap water were used as working fluids. The superficial velocity ranges of oil, air and water were 0.05~0.51 m/s, 0.05~1.51 m/s and 0.02~50.6 m/s, respectively. According to the different structures of gas and liquids, typical flow patterns in horizontal pipe are divided into bubbly flow, intermitted flow (plug flow and slug flow), stratified flow and annular flow. The frictional pressure drop multiplier of three-phase flow was expressed using the Chisholm parameter correlation in accordance with typical flow pattern, but the modification factor C in the correlations was defined afresh according to flow conditions. New predict correlations for pressure gradient in accordance with typical flow patterns were proposed and the mechanisms of pressure drop production were analyzed for each flow patterns. The proposed models give a good agreement with the experimental data.