气液固三相分离旋流器参数优选及流场特性研究
发布时间：2018-11-22 10:09
【摘要】：本文首先对研究背景、多相分离技术、气液固三相分离技术、流场测试技术以及高速摄像技术进行了简单的介绍,并对这些技术的分离原理以及国内外的研究现状作了进一步的说明。简单阐述了本论文研究目的、内容以及意义。在常规双锥旋流器的基础上,通过增加一个固相的排砂口设计出本文的气液固三相分离旋流器。分别应用三维建模软件SolidWorks、网格划分软件Gambit以及计算流体力学软件Fluent对本文旋流器的初始模型进行建模、网格划分、网格独立性的检验。应用正交试验的方法对旋流器进行结构参数的优选,利用正交试验研究旋流腔长度、气相溢流管伸入长度、气相溢流管直径、大锥段锥角、,小锥段锥角以及液相出口管直径对气固两相分离效率的影响规律和影响程度。同时,通过对比初始结构和优选结构的速度场、压力损失、气相体积分数以及固相体积分数,证明了优选结构的有更好的分离性能。介绍了粒子图像测速PIV试验系统的流程及主要试验设备,应用PIV技术对优化后的气液固三相分离旋流器内的三个不同截面以及三块不同区域的速度场进行了测试,重点研究了切向速度和轴向速度在不同流量及分流比下的变化规律,并验证了数值模拟的准确性。介绍了高速摄像试验系统的流程及主要试验设备,利用高速摄像技术对优化后的气液固三相分离旋流器内的气固两相的运动进行跟踪拍摄,清晰地看到了旋流器内气核的形成过程,内旋流运动、气体的分离过程以及固相颗粒的运动规律。
[Abstract]:In this paper, the research background, multi-phase separation technology, gas-liquid-solid three-phase separation technology, flow field testing technology and high-speed camera technology are introduced. The separation principle of these technologies and the current research situation at home and abroad are further explained. The purpose, content and significance of this paper are briefly described. Based on the conventional double cone cyclone, the gas-liquid-solid three-phase separation cyclone is designed by adding a solid sand outlet. The initial model of the hydrocyclone is modeled by the three-dimensional modeling software SolidWorks, mesh division software Gambit and the computational fluid dynamics software Fluent respectively. Orthogonal test was used to select the structure parameters of hydrocyclone. The length of swirl chamber, the length of gas overflow tube, the diameter of gas phase overflow tube, the conical angle of large cone segment, the length of gas phase overflow tube, and the conical angle of large conical section were studied by orthogonal test. The influence of conical angle of small cone segment and the diameter of liquid outlet tube on the efficiency of gas-solid two-phase separation is studied. At the same time, by comparing the velocity field, pressure loss, gas phase volume fraction and solid volume fraction of the initial structure and the optimized structure, it is proved that the optimized structure has better separation performance. The flow chart and main test equipment of particle image velocimetry PIV test system are introduced. Three different sections and three different regions of the optimized gas-liquid-solid three-phase separation cyclone are tested by PIV technology. The variation of tangential velocity and axial velocity under different flow rate and shunt ratio is studied, and the accuracy of numerical simulation is verified. The flow chart and main test equipment of the high speed camera test system are introduced. The motion of gas-solid two-phase in the optimized gas-liquid-solid three-phase separation cyclone is tracked and photographed by using high-speed camera technology. The formation process of gas nucleus, the internal swirl movement, the separation process of gas and the movement of solid particles in the hydrocyclone are clearly observed.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE937
[Abstract]:In this paper, the research background, multi-phase separation technology, gas-liquid-solid three-phase separation technology, flow field testing technology and high-speed camera technology are introduced. The separation principle of these technologies and the current research situation at home and abroad are further explained. The purpose, content and significance of this paper are briefly described. Based on the conventional double cone cyclone, the gas-liquid-solid three-phase separation cyclone is designed by adding a solid sand outlet. The initial model of the hydrocyclone is modeled by the three-dimensional modeling software SolidWorks, mesh division software Gambit and the computational fluid dynamics software Fluent respectively. Orthogonal test was used to select the structure parameters of hydrocyclone. The length of swirl chamber, the length of gas overflow tube, the diameter of gas phase overflow tube, the conical angle of large cone segment, the length of gas phase overflow tube, and the conical angle of large conical section were studied by orthogonal test. The influence of conical angle of small cone segment and the diameter of liquid outlet tube on the efficiency of gas-solid two-phase separation is studied. At the same time, by comparing the velocity field, pressure loss, gas phase volume fraction and solid volume fraction of the initial structure and the optimized structure, it is proved that the optimized structure has better separation performance. The flow chart and main test equipment of particle image velocimetry PIV test system are introduced. Three different sections and three different regions of the optimized gas-liquid-solid three-phase separation cyclone are tested by PIV technology. The variation of tangential velocity and axial velocity under different flow rate and shunt ratio is studied, and the accuracy of numerical simulation is verified. The flow chart and main test equipment of the high speed camera test system are introduced. The motion of gas-solid two-phase in the optimized gas-liquid-solid three-phase separation cyclone is tracked and photographed by using high-speed camera technology. The formation process of gas nucleus, the internal swirl movement, the separation process of gas and the movement of solid particles in the hydrocyclone are clearly observed.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE937
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