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当前位置: 首页 > 文章 > 双轴桨叶式混合机内椭球颗粒混合特性模拟 农机化研究 2017,39 (6) 74-78
Position: Home > Articles > Simulation on Mixing Characteristic for Ellipsoid Particles in Twin-shaft Paddle Mixer Journal of Agricultural Mechanization Research 2017,39 (6) 74-78

双轴桨叶式混合机内椭球颗粒混合特性模拟

作  者：
兰海鹏;刘扬;贾富国;唐玉荣;沈柳杨;栗文
单  位：
塔里木大学;东北农业大学工程学院
关键词：
混合机;椭球颗粒;混合特性;离散元法;双轴桨叶
摘  要：
为探讨双轴桨叶式混合机内椭球颗粒的随机运动和混合特性,采用离散元法对颗粒混合过程进行了模拟研究。从单颗粒的随机运动轨迹、颗粒群的流线运动轨迹的角度分析了颗粒运动规律及混合特征,定量描述了混合程度与转子旋转圈数的数学关系。结果表明:混合机内椭球颗粒的随机运动剧烈,径向和轴向上的混合效果良好;分层颗粒的混合均匀是在对流混合,剪切混合和扩散混合共同作用下实现的;分层颗粒的混合度与转子旋转圈数直接相关,混合度与圈数的关系符合指数增长模型。
译  名：
Simulation on Mixing Characteristic for Ellipsoid Particles in Twin-shaft Paddle Mixer
作  者：
Lan Haipeng;Liu Yang;Jia Fuguo;Tang Yurong;Shen Liuyang;Li Wen;Tarim University The Key Laboratory of Modern Agriculture;Tarim University College of Mechanic and Electrical Engineering;Department of Engineering,Northeast Agricultural University;
关键词：
mixer;;ellipsoid particles;;mixing characteristics;;discrete element;;twin-shaft paddle
摘  要：
To investigate random motion and mixing characteristics of ellipsoid particles in twin-shaft paddle mixer,mixing process of particles is simulated using discrete element method in this research. Particles mixing law and mixing characteristics are analysed with the view of a single particle random motion trajectories and streamline motion trajectories diagram of particles swarm. And the mathematic relation between mixability and revolutions of agitating blades is described quantitatively. Results show that random motion of ellipsoid particles is acute,mixing performance is favorable in radial direction and axial direction. Convective mixing,shear mixing and diffusive mixing control the mixing homogeneity process of segregation particles. Mixability of segregation particles has direct correlation with revolutions. The relation between mixability and revolutions conforms to the exponential growth model.

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