基于XPTV的流化床异形颗粒分布特性研究
发布时间：2018-07-14 10:46
【摘要】：构建了X光颗粒示踪(X-ray particle tracking velocimetry,XPTV)测量系统,建立了示踪颗粒的制备方法以及示踪颗粒位置与姿态取向的测量和误差评估方法。基于以上方法获得了不同气速下圆柱颗粒位置和姿态取向的分布规律,并阐述了以上分布规律与流型之间的内在联系。结果表明,流化床处于鼓泡流化时圆柱颗粒会形成内循环,颗粒中心线与竖直方向多呈倾斜状态;而处于湍动流化时圆柱颗粒则会在全床内趋于均匀分布,颗粒中心线趋于竖直方向。
[Abstract]:The X-ray particle tracking particle tracer (XPTV) measurement system was constructed. The preparation method of the tracer particle and the measurement and error evaluation method of the location and orientation of the tracer particle were established. Based on the above methods, the distribution laws of the position and orientation of cylindrical particles at different gas velocities are obtained, and the internal relations between the above distribution laws and the flow patterns are expounded. The results show that when fluidized bed is bubbling, the cylindrical particles will form internal circulation, and the center line and vertical direction of the particles will be inclined, while in turbulent fluidization, the cylindrical particles will tend to distribute uniformly in the whole bed. The center line of the particle tends to be vertical.
【作者单位】： 东南大学能源与环境学院能源热转换及其过程测控教育部重点实验室;东南大学-蒙纳士大学联合研究院颗粒系统模拟与仿真中心;澳大利亚蒙纳士大学化学工程系;
【基金】：国家自然基金重大项目(No.51390492) 国家杰出青年科学基金(No.51325601)
【分类号】：TQ021.1
，
本文编号：2121398
[Abstract]:The X-ray particle tracking particle tracer (XPTV) measurement system was constructed. The preparation method of the tracer particle and the measurement and error evaluation method of the location and orientation of the tracer particle were established. Based on the above methods, the distribution laws of the position and orientation of cylindrical particles at different gas velocities are obtained, and the internal relations between the above distribution laws and the flow patterns are expounded. The results show that when fluidized bed is bubbling, the cylindrical particles will form internal circulation, and the center line and vertical direction of the particles will be inclined, while in turbulent fluidization, the cylindrical particles will tend to distribute uniformly in the whole bed. The center line of the particle tends to be vertical.
【作者单位】： 东南大学能源与环境学院能源热转换及其过程测控教育部重点实验室;东南大学-蒙纳士大学联合研究院颗粒系统模拟与仿真中心;澳大利亚蒙纳士大学化学工程系;
【基金】：国家自然基金重大项目(No.51390492) 国家杰出青年科学基金(No.51325601)
【分类号】：TQ021.1
，
本文编号：2121398
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