微粒羽流自由降落过程特性的探讨-《郑州大学学报(工学版)》

文章信息/Info

Title:: Discussion on the characteristics of particulate plume free descent process

作者:: 赵永岭; 刘泽勤; 赵敬华; 等.; 天津商业大学,机械工程学院,天津,300134, 天津商业大学,机械工程学院,天津,300134, 天津商业大学,机械工程学院,天津,300134, 天津商业大学,机械工程学院,天津,300134, 天津商业大学,机械工程学院,天津,300134, 天津商业大学,机械工程学院,天津,300134

Keywords:: free-falling particle stream; particulate plume; Ambient air intake

摘要:: 根据自由下落微粒羽流的运动特征,对微粒羽流自由下落过程中卷吸空气的机理进行初步分析,应用Tomomi给出的混合微粒模型及Ogata给出的单微粒模型与环境空气卷吸量实验值进行对比分析.结果表明,混合微粒模型对环境空气卷吸量的模拟值与实验值有较好的吻合性,而Ogata给出的单微粒模型预测值低于实测值.实验结果表明,环境空气卷吸量随着微粒羽流下降高度的延伸而增加,随着微粒流中微粒的密度及粒径的增大而减小.

Abstract:: According to the motion characteristics of free-falling particle plumes, the mechanism of air ensorment during the free fall of particulate plumes was preliminarily analyzed, and the mixed particle model given by Tomomi and the single particle model given by Ogata were compared with the experimental values of ambient air entrapment. The results show that the simulated values of ambient air uptake in the mixed particulate model are in good agreement with the experimental values, while the predicted values of the single particulate model given by Ogata are lower than the measured values. The experimental results show that the ambient air uptake increases with the extension of the decreasing height of the particulate plume, and decreases with the increase of the density and size of the particles in the particulate stream.