以叶轮起旋的气液两相螺旋流摩擦阻力特性实验研究

发布时间：2019-01-06 11:15

【摘要】：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。
[Abstract]:In this paper, the friction pressure drop characteristics of gas-liquid two-phase helical flow in a horizontal tube with impeller rotation are experimentally studied. The horizontal experimental tube is a plexiglass tube with an inner diameter of 23 mm, and a length of 2 m. The experimental working medium is air and water. The conversion velocity of gas phase is 0 m / s / s 3 m / s, and that of liquid phase is 0 m / s / s 1. 5 m / s. The effects of flow velocity and impeller parameters on pressure drop are studied, and the pressure drop characteristics of gas-liquid two-phase non-swirling flow and gas-liquid two-phase helical flow are compared. The experimental results show that the flow velocity is an important factor affecting the friction resistance characteristics in the tube. With the increase of the gas phase conversion velocity, the pressure drop in the tube increases gradually. The impeller parameters also have great influence on the pressure drop. With the increase of the starting angle or the decrease of the blade area, the pressure drop increases gradually. Compared with gas-liquid two-phase non-swirl flow, the pressure drop of gas-liquid two-phase helical flow increases further, and with the increase of gas phase conversion velocity, the pressure drop of helical flow increases faster than that of non-swirl flow. Finally, based on the Lockhart and Martinelli methods, the pressure drop model of gas-liquid two-phase helical flow is established according to the experimental data. The results show that the theoretical values are in good agreement with the experimental values.
【作者单位】：江苏大学能源与动力工程学院;江苏省油气储运技术重点实验室;常州大学石油工程学院;
【基金】：国家自然科学基金(51574045)~~
【分类号】：TE81

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