进风管锥度与供风方式对冷风发酵房流场均匀性的影响  

Effects of inlet duct taper and air supply mode on flow field uniformity in cold air fermentation room

作　　者：张国荣[1,2] 张界威 季家东 方永 陈清华 胡胜信[2] ZHANG Guorong;ZHANG Jiewei;JI Jiadong;FANG Yong;CHEN Qinghua;HU Shengxin(School of Mechanical and Electrical Engineering,Anhui University of Science and Technology,Huainan,Anhui 232001,China;Anhui Jinxinxu Intelligent Equipment Manufacturing Co.,Ltd.,Chizhou,Anhui 247099,China)

机构地区：[1]安徽理工大学机电工程学院,安徽淮南232001 [2]安徽金鑫旭智能装备制造有限公司,安徽池州247099

出　　处：《食品与机械》2025年第2期94-100,共7页Food and Machinery

基　　金：安徽省农业物质技术装备重点项目(编号:HX2024042437)。

摘　　要：[目的]提高冷风发酵房内气流的均匀性。[方法]利用Fluent软件进行数值模拟,以平均速度和速度不均匀系数为评价指标,在供风量不变的条件下,探究进风管锥度对各送风口风量的影响规律;研究不同供风方式下发酵房横截面内气流速度的分布特点,并构建循环供风方式,分析一个周期内各供风方式的最佳时间占比。[结果]随着进风管锥度的增大,始端送风口风量逐渐减小而末端逐渐增大,当锥度为7∶5时,进风管送风均匀性最好;相比于双侧供风,单侧供风平均速度大,有利于水分蒸发,但流场均匀性不好,降低了物料品质;在循环供风方式中,当双侧、左侧、右侧供风在1个周期内的工作时间占比分别为64%,18%,18%时,流场速度均匀性最好,相比于单一的双侧供风提高了16.4%,平均速度提高了13.2%。[结论]通过对进风管锥度以及供风方式的改进,提高了冷风发酵房内气流的均匀性。[Objective]To improve the uniformity of airflow in the cold air fermentation room.[Methods]Numerical simulations were performed using Fluent software,with average velocity and velocity non-uniformity coefficient as evaluation indexes.Under constant supply air volume,the influence of inlet duct taper on the airflow at each supply air outlet was studied.The distribution characteristics of airflow velocity in the cross-section of the fermentation room under different air supply methods were examined.A circulating air supply mode was then developed,and the optimal time proportion of each air supply method within a cycle was analyzed.[Results]As the taper of the inlet duct increased,the airflow at the starting supply port gradually decreased,while the airflow at the end increased.The best air supply uniformity in the inlet duct was achieved when the taper was 7∶5.Compared with double-sided air supply,single-side air supply resulted in a higher average speed,which is beneficial for moisture evaporation.However,the uniformity of the flow field was poor,which decreased the material quality.In the circulating air supply mode,the best uniformity of the flow field velocity was achieved when the working time of the double-sided,left-side,and right-side air supply accounted for 64%,18%,and 18%of the cycle,respectively.Compared to single doublesided air supply,the uniformity of the flow field velocity improved by 16.4%,and the average speed increased by 13.2%.[Conclusion]By improving the inlet duct taper and optimizing the air supply mode,the uniformity of airflow in the cold air fermentation room was enhanced.

关 键 词：冷风发酵房 锥度 气流均匀性 干燥品质 结构优化 

分 类 号：TU8[建筑科学]