包装与食品机械2025，Vol.43Issue(2)：39-49,11.DOI:10.3969/j.issn.1005-1295.2025.02.005
壁面滑移条件对豆渣螺杆挤压混合性能的影响
Effects of wall slip conditions on mixing performance in okara screw extrusion
吕磐 1伍娟 2程宇 3马海乐3
作者信息
- 1. 江苏大学 农业工程学部,江苏 镇江 212001||江苏大学 食品与生物工程学院,江苏 镇江 212001
- 2. 江苏大学 食品与生物工程学院,江苏 镇江 212001||江苏大学 食品物理加工研究院,江苏 镇江 212001
- 3. 江苏大学 农业工程学部,江苏 镇江 212001||江苏大学 食品与生物工程学院,江苏 镇江 212001||江苏大学 食品物理加工研究院,江苏 镇江 212001
- 折叠
摘要
Abstract
To resolve the simulation deviation in twin-screw extrusion of okara caused by neglecting wall slip,this study applied the generalized Navier slip criterion to simulate its mixing performance.Using Polyflow software,the effects of screw type and rotation speed on mixing were analyzed through residence time distribution(RTD),mixed statistics,and maximum shear stress.Experimental validation was performed by assessing color distribution uniformity in dyed okara.Simulations showed that under no-slip conditions,materials in kneading blocks had the shortest RTD(3～8 s)and stable shear stress(4×10-⁶～6×10-⁶ Pa).Wall slip extended RTD to 8～30 s.At 120 r/min with reverse-threaded screws,the RTD exhibited a bimodal distribution,reducing mixing uniformity,though kneading blocks maintained the fastest homogenization time and higher shear stress(6×10-⁶～8×10-⁶ Pa).Validation tests confirmed interlaced color distribution in extrudates,with an R-pixel standard deviation of 22.89 and significant particle refinement,aligning with simulation results.This research offers theoretical insights for optimizing twin-screw extrusion processes.关键词
豆渣/螺杆挤压/仿真/壁面滑移/混合统计Key words
okara/screw extrusion/simulation/wall slip/mixed statistics分类
轻工业引用本文复制引用
吕磐,伍娟,程宇,马海乐..壁面滑移条件对豆渣螺杆挤压混合性能的影响[J].包装与食品机械,2025,43(2):39-49,11.
