Abstract
[Objective] In response to the drying quality problem caused by the uneven distribution of the flow field inside the tunnel-type dryer for Lyophyllum decastes, this paper proposes a structural optimization method based on the porous media model, aiming at improving the drying uniformity and energy efficiency. [Methods] The viscous drag coefficient and inertial drag coefficient of L.decastes are measured, and the Realizable k-ε turbulence-porous medium coupling model is established. A double-end flow equalizing plate deflector is designed and used to optimize the airflow distribution based on a hexagonal close-packed hole array, and the optimal parameters are screened by combining the analysis of pressure drop characteristics for five aperture schemes. [Results] After optimization, the average velocity of YZ, XZ, and XY sections are increased by 48%, 25%, and 26%, respectively, and the nonuniformity coefficient of air velocity is reduced by 62%, 48%, and 49%, respectively. Experimental verification shows that the standard deviation of drying uniformity index is reduced by 67.5%, and the energy efficiency is increased by 30.1%. As a result, the drying cycle is shortened by 19%. [Conclusion] The dual mechanism of flow field shaping by the aperture of the flow equalizing plate is obtained in this study: narrow apertures accelerate the airflow to suppress flow separation, while periodic aperture arrays balance the velocity distribution.
Publication Date
4-3-2026
First Page
82
Last Page
92
DOI
10.13652/j.spjx.1003.5788.2025.80435
Recommended Citation
Huihui, ZHAO; Chunyan, ZHANG; Zhen, XU; Zhongxiang, HUANG; and Xueping, ZHENG
(2026)
"Simulation of flow field and structure optimization of tunnel-type dryer for Lyophyllum decastes,"
Food and Machinery: Vol. 42:
Iss.
2, Article 10.
DOI: 10.13652/j.spjx.1003.5788.2025.80435
Available at:
https://www.ifoodmm.cn/journal/vol42/iss2/10
References
[1] 于海玲,汪依霓,万雨欣,等.不同干燥方式对鹿茸菇品质的影响 [J].华侨大学学报 (自然科学版),2024,45(5):673-680.YU H L,WANG Y N,WAN Y X,et al.Effect of different drying methods on quality of Lyophyllum decastes [J].Journal of Huaqiao University (Natural Science),2024,45(5):673-680.
[2] 戴竹青,孙思燕,江宁,等.不同干燥处理对荷叶离褶伞品质的影响 [J].江苏农业科学,2020,48(13):220-224.DAI Z Q,SUN S Y,JIANG L,et al.Effect of different drying treatments on quality of Lyophyllum decastes [J].Jiangsu Agricultural Sciences,2020,48(13):220-224.
[3] 程 继 红.名 贵 食 药 用 菌 鹿 茸 菇 商 业 化 生 产 现 状 与 发 展 前 景[J].食药用菌,2014,22(4):194-197.CHENG J H.The commercial production situation and prospects of the new valuable edible and medicinal mushroom,Lyophyllum decastes [J].Edible and Medicinal Mushrooms,2014,22(4):194-197.
[4] ADNOUNI M,JIANG L,ZHANG X J,et al.Computational modelling for decarbonised drying of agricultural products:sustainable processes,energy efficiency,and quality improvement[J].Journal of Food Engineering,2023,338:111247.
[5] ACAR C,DINCER I,MUJUMDAR A.A comprehensive review of recent advances in renewable-based drying technologies for a sustainable future [J].Drying Technology,2022,40(6):1 029-1 050.
[6] WANG H C,ZHANG M,MUJUMDAR A S.Comparison of three new drying methods for drying characteristics and quality of shiitake mushroom (Lentinus edodes)[J].Drying Technology,2014,32(15):1 791-1 802.
[7] ZOU K,HUANG Y Y.Analysis of the flow field in the lower air-inlet drying area of the tobacco baking equipment [C]// Advanced Manufacturing and Automation XII.Singapore:Springer Nature Singapore,2023:798-807.
[8] HASSAN A,JOARDDER M U H,KARIM A.A CFD integrated drying model for improving drying conditions in industry scale dryers [J].Thermal Science and Engineering Progress,2025,61:103533.
[9] 李研,普恩平,王亚辉,等.均风板对烟叶模拟烘烤机内气流分布的影响 [J].西南农业学报,2020,33(2):423-428.LI Y,PU E P,WANG Y H,et al.Influence of uniform air plate on air distribution in tobacco simulated baking machine [J].Southwest China Journal of Agricultural Sciences,2020,33(2):423-428.
[10] 王晋伟,陈竞楠,韩冬,等.基于均流板原理的通风墙型植物工 厂 循 环 送 风 系 统 设 计 与 模 拟 [J].农 业 工 程 学 报,2023,39(13):213-221.WANG J W,CHEN J N,HAN D,et al.Design and simulation of the circulating air supply system for a ventilated wall-type plant factory based on the principle of uniform flow plate [J].Transactions of the Chinese Society of Agricultural Engineering,2023,39(13):213-221.
[11] NADEW T T,TEGENAW P D,TEDILA T S.Mathematical-based CFD modelling and simulation of mushroom drying in tray dryer [J].Modelling and Simulation in Engineering,2023,2 023(1):6128517.
[12] TEGENAW P D,VERBOVEN P,VANIERSCHOT M.Numerical and experimental study of airflow resistance across an array of sliced food items during drying [J].Journal of Food Engineering,2022,312:110739.
[13] 刘瑞,董继先,王栋,等.菊花热风烘房的流场模拟及结构优化[J].机械设计,2021,38(1):47-54.LIU R,DONG J X,WANG D,et al.Flow-field simulation and structural optimization of the chrysanthemum hot air drying room [J].Journal of Machine Design,2021,38(1):47-54.
[14] 胡如响,孙东亮,朱跃强,等.物料—干燥箱一体化的香菇热风干燥模拟方法及应用 [J].食品科学,2023,44(15):57-68.HU R X,SUN D L,ZHU Y Q,et al.A simulation method based on material-drying oven integration for hot air drying of Lentinus edodes and its application [J].Food Science,2023,44(15):57-68.
[15] 刘静,翁小祥,奚小波,等.香菇干燥技术研究进展 [J].包装与食品机械,2021,39(2):37-44.LIU J,WENG X X,XI X B,et al.Research progress in technology of drying lentinus edodes [J].Packaging and Food Machinery,2021,39(2):37-44.
[16] 李佳欢,杨斌,任佳媛,等.热风干燥温度对荷叶离褶伞干燥特 性 及 挥 发 性 风 味 物 质 的 影 响 [J].菌 物 学 报,2021,40(12):3 304-3 319.LI J H,YANG B,REN J Y,et al.Effects of hot air drying temperature on drying characteristics and volatile flavor compounds for Lyophyllum decastes [J].Mycosystema,2021,40(12):3 304-3 319.
[17] 高晓倩,刘瑞玲,吴来春,等.基于 LF-NMR 研究双孢菇远红外 辅 助 热 泵 干 燥 过 程 中 水 分 迁 移 规 律 及 品 质 变 化 [J].中 国食品学报,2024,24(8):403-413.GAO X Q,LIU R L,WU L C,et al.Studies on water migration rule and quality change of agaricus bisporus during far-infrared assisted heat pump drying based on LF-NMR technology [J].Journal of Chinese Institute of Food Science and Technology,2024,24(8):403-413.
[18] LIU R,DONG J X,DONG P P,et al.Analysis and structure optimization of the flow and temperature fields of the large-scale hot air drying room [J].Drying Technology,2024,42(15):2 195-2 211.
[19] LIN J M,BAO M,LI H Z,et al.Characteristic simulation and working parameter optimization of the aggregate dryer [J].Drying Technology,2023,41(4):590-604.
[20] 田津津,谷旭东,张哲,等.不同果径苹果差压预冷性能模拟与分析 [J].食品与机械,2024,40(2):117-124,176.TIAN J J,GU X D,ZHANG Z,et al.Simulation and analysis of forced air precooling performance of apples with different fruit diameters [J].Food & Machinery,2024,40(2):117-124,176.
[21] 魏新龙,李三平,吴立国,等.基于 Fluent 的核桃带式连续烘干机设计 [J].食品与机械,2021,37(12):80-88.WEI X L,LI S P,WU L G,et al.Design of walnut belt continuous dryer based on Fluent [J].Food & Machinery,2021,37(12):80-88.
[22] 郭子文,张晓勤,王志琴,等.热风红外联合干燥装置均风板的设计与试验 [J].农机化研究,2024,46(1):238-246.GUO Z W,ZHANG X Q,WANG Z Q,et al.Design and experiment of uniform outflow plate in hot air infrared combined drying device [J].Journal of Agricultural Mechanization Research,2024,46(1):238-246.
[23] 袁越锦,史韵,聂皓,等.果蔬隧道式气流冲击干燥流场模拟及其设备结构优化 [J].包装与食品机械,2024,42(5):70-81.YUAN J Y,SHI Y,NIE H,et al.Simulation of flow field and equipment structure optimization for tunnel airflow impact drying on fruit and vegetable [J].Packaging and Food Machinery,2024,42(5):70-81.
[24] 卢富明,范雪琪,丁雨晴,等.双向侧风木材干燥窑内流场的数值模拟与优化 [J].林产工业,2023,60(1):33-39.LU F M,FAN X Q,DING Y Q,et al.Numerical simulation and optimization of flow field in bilateral side-fan wood drying kiln [J].China Forest Products Industry,2023,60(1):33-39.
[25] 张利峰,廖骞,刘大为,等.5H-2谷物烘干机干燥箱多孔角状盒的设计与试验 [J].湖南农业大学学报 (自然科学版),2024,50(2):86-91.ZHANG L F,LIAO Q,LIU D W,et al.Design and experiment of multi-hole horn box in oven of 5H-2 grain dryer [J].Journal of Hunan Agricultural University (Natural Sciences),2024,50(2):86-91.
[26] WANG X J,XU S Q,ZHOU S W,et al.Topological design and additive manufacturing of porous metals for bone scaffolds and orthopaedic implants:a review [J].Biomaterials,2016,83:127-141.
[27] ZHOU X,RAMASWAMY H,QU Y T,et al.Combined radio frequency-vacuum and hot air drying of kiwifruits:Effect on drying uniformity,energy efficiency and product quality [J].Innovative Food Science & Emerging Technologies,2019,56:102182.
