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浙江大学学报(工学版)
浙江大学学报(工学版)  2025, Vol. 59 Issue (11): 2285-2292    DOI: 10.3785/j.issn.1008-973X.2025.11.007
机械工程、能源工程     
柔性生物质颗粒运动混合的实验研究
许丹丹1(),蒋恩柯1,诸骏1,郭宇2
1. 浙江工业大学 机械工程学院，浙江 杭州 310023
2. 浙江大学 航空航天学院，浙江 杭州 310027
Experimental investigation on dynamics and mixing of flexible biomass particles
Dandan XU1(),Enke JIANG1,Jun ZHU1,Yu GUO2
1. College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, China
2. School of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, China
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摘要：

为了深入理解柔性生物质颗粒的运动混合行为，选取纤维状烟丝颗粒为代表，开展旋转滚筒内烟丝颗粒的运动混合的实验研究. 采用图像处理的方法，确定动态休止角(AOR)和莱西混合指数，分别量化标定颗粒运动形态和混合程度. 开展关键参数的分析，发现颗粒填充度的增加会引起动态休止角和混合速率降低. 在当前考察的参数值范围内，滚筒内壁摩擦系数和滚筒转速的增加虽然对动态休止角的影响不大，但是会引起颗粒混合速率的显著增加. 在滚筒内壁安装耙钉，会显著增大动态休止角；采用适当的耙钉数量和长度，可以实现较大的颗粒混合速率.
关键词： 生物质颗粒;  柔性纤维;  颗粒混合;  颗粒流;  旋转滚筒;  图像处理    
Abstract:

Experimental studies were conducted to analyze dynamics and mixing behavior of the tobacco particles in a rotating drum by using fibrous tobacco particles as representatives of the biomass particles in order to understand dynamic and mixing behaviors of flexible biomass particles. Dynamic angle of repose (AoR) and Lacey index were determined by using image process method in order to respectively quantify flowability and extent of mixing. Effects of some critical parameters were analyzed. Results showed that an increase in the material fill ratio led to a reduction in both AoR and mixing rate. Augments in the particle-wall friction coefficient and rotational velocity in the considered ranges showed slight impacts on AoR, while they remarkably enhanced the mixing rate. Installation of rods on the internal surface of the drum increased AoR, and the mixing rate was maximized by installing the rods with optimal number and length.
Key words: biomass particle    flexible fiber    granular mixing    granular flow    rotating drum    image process
收稿日期: 2024-10-01 出版日期: 2025-10-30
:  TK124  
基金资助: 国家自然科学基金资助项目(12372250).
作者简介: 许丹丹（1987—），女，讲师，博士，从事力学、颗粒技术、能源和化工领域的交叉研究. orcid.org/0009-0002-1907-2840. E-mail：xudandan@zjut.edu.cn
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许丹丹
蒋恩柯
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引用本文:

许丹丹,蒋恩柯,诸骏,郭宇. 柔性生物质颗粒运动混合的实验研究[J]. 浙江大学学报(工学版), 2025, 59(11): 2285-2292.

Dandan XU,Enke JIANG,Jun ZHU,Yu GUO. Experimental investigation on dynamics and mixing of flexible biomass particles. Journal of ZheJiang University (Engineering Science), 2025, 59(11): 2285-2292.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2025.11.007    或    https://www.zjujournals.com/eng/CN/Y2025/V59/I11/2285

图 1  烟丝颗粒的粒度、粒形表征
图 2  旋转滚筒实验装置的示意图
图 3  采用图像处理方法确定运动颗粒床动态休止角的流程
图 4  采用图像处理方法确定莱西混合指数的流程
图 5  小滚筒(R = 92 mm)内不同填充度下动态休止角随时间的变化
图 6  不同尺寸滚筒内平均动态休止角随颗粒填充度的变化
图 7  小滚筒内不同填充度的混合过程（R = 92 mm, ω = 9 r/min, μ = 1.0）
图 8  滚筒尺寸与填充度对颗粒混合的影响
图 9  不同尺寸滚筒内的平均动态休止角随颗粒-壁面摩擦系数的变化
图 10  颗粒-壁面摩擦系数对颗粒混合的影响
图 11  不同尺寸滚筒的平均动态休止角随滚筒转速的变化
图 12  滚筒转速和尺寸对颗粒混合速率的耦合影响
图 13  带3个耙钉的滚筒内烟丝颗粒混合实验
图 14  耙钉数对颗粒运动和混合的影响
图 15  耙钉长度对颗粒运动和混合的影响
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