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在加速型陀螺系统中对粒子动态进行CFD分析,以提高PIVG性能.

Ramy Elaswad1, Naser El-Sheimy2, Abdulmajeed Mohamad1

  • 1Department of Mechanical and Manufacturing Engineering, Schulich School of Engineering, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada.

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|January 8, 2025
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概括

粒子密度显著影响加速圆形流动中的运动,这对于粒子成像速度计陀螺仪 (PIVG) 优化至关重要. 较重的粒子集中较低,而较轻的粒子分散均.

关键词:
计算流体动力学的流体动力学.离散阶段模型的模型.惯性导航传感器 惯性导航传感器粒子成像速度测定陀螺仪陀螺仪 粒子成像速度测量陀螺仪微粒追踪器 微粒追踪器一个巨型的 toroidal 形状.

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科学领域:

  • 流体动力学 流体动力学
  • 粒子运输现象 粒子运输现象

背景情况:

  • 粒子成像速度测量陀螺仪 (PIVG) 需要精确了解复杂流体几何中的粒子行为.
  • 在PIVG系统中使用 toroidal 流通道,因此需要对它们内的粒子动态进行详细分析.

研究的目的:

  • 为了研究粒子运动和分布在加速 toroidal 流通道.
  • 为了确定不同粒子密度和角度加速对粒子行为的影响.
  • 为优化粒子成像速度测量陀螺仪 (PIVG) 的精度和可靠性提供见解.

主要方法:

  • 计算流体动力学 (CFD) 模拟用于模拟粒子行为.
  • 对特定的角加速 (4,6,8rad/s2) 和粒子密度 (1100,1050,980 kg/m3) 进行了模拟.
  • 分析的重点是颗粒度分布,速度概况和 toroidal 几何体内的位移模式 (1.5%体积分数,50微米颗粒).

主要成果:

  • 发现粒子密度是影响粒子行为和移位的关键因素.
  • 较重的粒子 (1100公斤/立方米) 呈现出随着时间的推移在较低的z值下沉和缩的趋势.
  • 较轻的粒子 (980 kg/m3) 在整个状通道中表现出更均的分布.

结论:

  • 基于密度的粒子的差异沉积和分布模式是PIVG设计的关键考虑因素.
  • 了解这些粒子动态可以提高PIVG性能和校准.
  • 这项研究通过详细的流体动力学分析,有助于PIVG技术的进步.