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本文首先从双相流基本微分方程出发,采用分相动量模型,推导得出了气液双相流体流过孔板时的关系式。根据这一关系式,作者对空气—机械油双相混合物进行了试验研究。试验用油在27℃时的粘度为3°E。试验中采用了圆缺孔板和锐缘孔板二种结构型式共六块不同尺寸的孔板。试验得到的均方根误差均在3%以下。经过对这二种类型孔板的试验数据的分析比较,作者认为,用圆缺孔板对油气混合物作流量单参数测量较为适宜。
Starting from the basic differential equations of two-phase flow, this paper derives the relation of gas-liquid two-phase fluid flowing through the orifice by using the phase separation momentum model. Based on this relationship, the author conducted an experimental study of the air-oil biphasic mixture. The test oil had a viscosity of 3 ° E at 27 ° C. The test uses a round missing orifice plate and the sharp edge of two kinds of structural patterns of a total of six different sizes of orifice plate. The root mean square error of the experiment is below 3%. After the comparison and analysis of the test data of these two types of orifice plates, the author believes that it is more appropriate to measure the single-parameter flow rate of the oil-gas mixture by the round orifice plate.