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该文对以叶轮起旋的水平管内气液两相螺旋流的摩擦阻力压降特性进行了实验研究,水平实验管段为内径23 mm,长度为2 m的有机玻璃管,实验工质为空气和水,气相折算速度为0 m/s–3 m/s,液相折算速度为0 m/s–1.5 m/s。主要研究了流速以及叶轮参数对压降的影响,对比分析了气液两相非旋流与气液两相螺旋流的压降特点,实验结果表明:流体流速是管内摩擦阻力特性的重要影响因素,随着气相折算速度的增大,管内压降逐渐增大。叶轮参数对压降亦有较大影响,随着起旋角度的增大或者随着叶片面积的减小,压降均有逐渐变大的趋势。与气液两相非旋流相比,气液两相螺旋流的压降进一步增大;且随着气相折算流速的增加,螺旋流的压降增大速度要高于非旋流。最后,基于Lockhart和Martinelli方法,根据实验数据建立了气液两相螺旋流压降计算模型,研究结果表明理论值与实验测量值吻合较好。
In this paper, the pressure drop characteristics of the frictional resistance of a gas-liquid two-phase spiral flow in a horizontal tube driven by an impeller are experimentally studied. The horizontal experimental tube section is an organic glass tube with an inner diameter of 23 mm and a length of 2 m. Experimental working conditions are air and The conversion speed of water and gas phase is 0 m / s-3 m / s and the liquid phase conversion speed is 0 m / s-1.5 m / s. The effects of flow velocity and impeller parameters on the pressure drop are mainly studied. The characteristics of the pressure drop of the two-phase non-swirling gas-liquid two-phase spiral flow are compared and analyzed. The experimental results show that the flow velocity is an important factor affecting the frictional resistance of the pipe , With the vapor phase velocity increases, the pressure drop within the tube increases. Impeller parameters also have a greater impact on pressure drop, with increasing spin-up angle or with the blade area decreases, the pressure drop has a tendency to become larger. Compared with gas-liquid two-phase non-swirl, the pressure drop of gas-liquid two-phase spiral flow further increases. With the increase of gas-phase flow rate, the pressure drop of spiral flow increases faster than non-swirl flow. Finally, based on the Lockhart and Martinelli method, the pressure drop calculation model of gas-liquid two-phase spiral flow was established based on the experimental data. The results show that the theoretical value is in good agreement with the experimental data.