• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2018, Vol. 54 ›› Issue (14): 225-232.doi: 10.3901/JME.2018.14.225

• 交叉与前沿 • 上一篇    

基于自激振荡的低速气力输送节能试验

晏飞1, 雒春升1, 王黎辉1, 苏世杰1, 刘高领2   

  1. 1. 江苏科技大学机械工程学院 镇江 212003;
    2. 上汽通用五菱汽车股份有限公司 柳州 545007
  • 收稿日期:2017-10-15 修回日期:2018-04-17 出版日期:2018-07-20 发布日期:2018-07-20
  • 通讯作者: 晏飞(通信作者),男,1980年出生,博士,副教授。主要研究方向为气固两相流动机理。E-mail:yanfei991314@163.com
  • 基金资助:
    江苏省自然科学基金(BK20140512)和教育部留学回国人员科研启动基金资助项目。

Experimental Study on the Low-velocity Self-excited Pneumatic Conveying System

YAN Fei1, LUO Chunsheng1, WANG Lihui1, SU Shijie1, LIU Gaoling2   

  1. 1. School of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003;
    2. SAIC GM Wuling Automobile Co. Ltd, Liuzhou 545007
  • Received:2017-10-15 Revised:2018-04-17 Online:2018-07-20 Published:2018-07-20

摘要: 目前气力输送设备的开发与应用仍然局限在忽视能耗的粗放型阶段。基于此拟在水平管气力输送系统物料入口上游处安装自由摆动的软翅以产生自激振荡流,实现系统节能降耗的目的。首先,通过试验测量系统的压力损失、最佳输送速度并计算能量损失系数,结果表明:相对于传统输送,自激振荡流能有效降低气力输送系统的最佳输送速度和能量损耗,最大减小量分别为15.2%和25.5%。然后,采用粒子成像测试技术(PIV)测量不同工况下的粒子流型及粒子速度,发现低速输送时自激振荡流可以避免颗粒沉积,增大粒子的轴向和悬浮速度;同时采用快速傅里叶变换(FFT)方法,分析不同工况下的粒子脉动速度,发现自激振荡流作用下的粒子速度脉动强度大于传统输送,揭示了自激振荡流的节能机理。

关键词: β-磷酸三钙, 仿生设计, 骨软骨支架, 聚乳酸, 三维打印, 功率谱, 粒子脉动强度, 粒子速度, 气力输送, 最佳输送速度

Abstract: The development and application of pneumatic conveying equipment is still confined to ignore the energy consumption of the extensive stage. The self-excited oscillation flow, generated by the soft fin mounted in the entrance of pipeline, is applied in the horizontal pneumatic conveying in order to promote pneumatic conveying system and save the system energy. First, the pressure drops and minimum, the critical velocities and the power consumption coefficient are measured and calculated, which results show that the minimum and critical velocities and power consumption are reduced by the self-excited oscillation flow, and the maximum reduction is 15.2% and 25.5%, respectively. Then, the particles flow regime and particle velocity are measured by using by using particle image velocimetry (PIV), and found that low speed conveyor with the self-excited oscillation flow can avoid particle deposition, increasing the particle axial and suspension velocity; at the same time, the particle fluctuation velocity is analyzed under different cases using fast Fourier transform (FFT) method, it is found that the particle velocity fluctuation intensity with the self-excited oscillation flow is larger than the traditional transport, reveals the energy-saving mechanism of the self-excited oscillation flow.

Key words: 3D Printing, biomimetic design, osteochondral scaffold, polylactide, β-tricalcium phosphate, minimum and critical velocities, particle fluctuation velocity, particles velocity, pneumatic conveying, power spectrum

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