Motion of a particle in a shock-induced flow

冲击引起的流动中粒子的运动

• 批准号: 07650218
• 负责人: SUZUKI Tateyuki
• 金额: $ 1.54万
• 依托单位: Toyama Prefectural University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650218/
• 关键词: drag coefficient; shock wave; multi-phase flow; particles; momentum exchange; unsteady flow; high-speed flow; sphere; 非定常; 舞い上がり; マグナス効果

In order to clarify the motion of a particle in a shock-induced flow, the drag coefficient of an accelerating sphere is evaluated by measuring the mean velocity and acceleration of a moving sphere behind a planar shock propagating in a shock tube. In the experiment, the trajectories of the spheres were recorded by a multi-exposure photography. The drag coefficients were then estimated from the trajectories.The relative Reynolds numbers around the moving spheres were in a range from 10^3 to 10^5. The obtained drag coefficients were found to be higher than those from the standard drag curve by 20% on the average. Fitting a curve to the present experimental points in the range of the relative Reynolds number (Re) from 3*10^3 to 10^5 results in the following correlation for the drag coefficient, C_D,C_D=0.35+0.04log_<10>Re.The initial mechanism of a particle's lift-up by a shock passage was also analyzed experimentally. The measured rotating rate of particles revealed that particle's initial rotation is not so effective for a particle to rise up.

为了阐明激波引起的流中粒子的运动，通过测量在激波管中传播的平面激波后面的运动球体的平均速度和加速度来评估加速球体的阻力系数。在实验中，通过多重曝光摄影记录了球体的轨迹。然后根据轨迹估计阻力系数。运动球体周围的相对雷诺数在 10^3 到 10^5 范围内。发现所获得的阻力系数比标准阻力曲线的阻力系数平均高出20%。将曲线拟合到相对雷诺数 (Re) 从 3*10^3 到 10^5 范围内的当前实验点，得出阻力系数的以下相关性：C_D,C_D=0.35+0.04log_<10> Re.还通过实验分析了激波通道提升粒子的初始机制。测量的颗粒旋转速率表明，颗粒的初始旋转对于颗粒的上升并不那么有效。

项目成果

T.Suzuki: "An Experimental Study on the Mechanism of Initial Particle Life-Up by a Shock Passage" Transactions of the Japan Society for Aeronautical and Space Sciences. 38. 243-250 (1995)

T.Suzuki：“通过冲击通道对初始粒子寿命上升机制的实验研究”日本航空航天学会会刊。

西野利一: "衝撃波と多孔性媒質との干渉" 平成8年度衝撃波シンポジウム講演論文集. 387-390 (1997)

Toshikazu Nishino：“冲击波与多孔介质之间的干涉”1996 年冲击波研讨会论文集 387-390 (1997)。

鈴木立之: "衝撃波に遭遇した微粒子の運動" 日本設計工学会北陸支部平成8年度研究発表論文集. 41-44 (1996)

铃木达之：“细颗粒遇到冲击波的运动”日本设计工程学会北陆分会 1996 年研究报告论文集 41-44 (1996)。

Y.Sakamura: "Mechanism of Oblique Shock-Wave Reflections from a Rough Wall" Proceedings of the 21st International Symposium on Shock Waves. (in print). (1998)

Y.Sakamura：“粗糙墙壁倾斜冲击波反射的机制”第 21 届国际冲击波研讨会论文集。

杉森雅一: "衝撃波管を用いた球形粒子の抵抗係数測定実験" 日本機械学会北陸信越支部第33期総会・講演会講演論文集. 209-210 (1996)

Masakazu Sugimori：“使用冲击波管测量球形颗粒的阻力系数的实验”日本机械工程师学会北陆信越分会第33届会议记录和演讲209-210（1996）。