曲房环境温湿度场的数值模拟及分布规律  

Numerical Simulation and Distribution of Ambient Temperature and Humidity Field in Qu Fang

作　　者：黄海飞 田建平 王开铸 付磊 杨海栗 黄丹 HUANG Hai-fei;TIAN Jian-ping;WANG Kai-zhu;FU Lei;YANG Hai-li;HUANG Dan(College of Mechanical Engineering,Sichuan University of Science&Engineering,Yibin 644000,China;Liquor Marking Biological Technology and Application of Key Laboratory of Sichuan Province,Sichuan University of Science&Engineering,Yibin 644000,China)

机构地区：[1]四川轻化工大学机械工程学院,四川宜宾644000 [2]四川轻化工大学酿酒生物技术及应用四川省重点实验室,四川宜宾644000

出　　处：《现代食品科技》2020年第9期148-155,40,共9页Modern Food Science and Technology

基　　金：四川省科技厅重点研发项目(2019YFG0167);中国轻工业浓香型发酵重点实验室项目(2018JJ011);自贡市重点科技计划项目(2018CXJD06)。

摘　　要：为得到大曲在发酵过程中曲房环境参数的变化规律,解析大曲在发酵不同时期间温湿度差异性,同一时期内曲房各层及各点间温湿度差异性。应用流体力学(CFD)软件Fluent,以发酵曲房为研究对象,通过profile导入发酵过程中大曲的实时发酵温度,借助多孔介质模型、组分输运模型,建立曲房内部三维紊流模型,采用非稳态计算方法,模拟研究了不同发酵阶段下曲房内部环境的温湿度分布特性,同时对相对应测点的温湿度变化情况进行检测与验证。研究结果表明:仿真结果与实测结果温度最大误差为7.74%,相对湿度最大误差为8.42%,均小于10%的误差允许范围,证明了曲房环境的对流换热及传质计算有足够精度;曲房内环境热湿传递具有耦合性,相对湿度在温度较高的中层呈现相对较低的情况,在温度较低的上层相对湿度较高;同时通过解析不同发酵阶段曲房环境温湿度分布规律及差异性,获得曲房内其他未检测区域的温湿度数据,为后续曲房风控策略提供模型参考,能够为下一步温湿度传感器位置的优化研究提供理论基础。The purpose of this study was to obtain the law of the changes in the environmental parameters of Daqu during fermentation,to analyze the difference in temperature and humidity of Daqu during different periods of fermentation,and the difference in temperature and humidity of all Daqu in the same fermentation room during the same period.Applying fluid mechanics(CFD)software Fluent,taking fermentation room as the research object,the real-time fermentation temperature of Daqu during the fermentation process was imported through the profile,and the porous media model and component transport model were used to establish a three-dimensional turbulent model inside the chamber.Then the non-steady-state calculation method was used to simulate the temperature and humidity distribution characteristics of the internal environment of the fermentation room at different fermentation stages.At last,the temperature and humidity changes at the corresponding detection points were detected and verified.The research results showed that the maximum error between the simulation results and the measured results was 7.74%for temperature and 8.42%for relative humidity,both of which were within the allowable error range of less than 10%,which proved that the convective heat transfer and mass transfer in curved room environment were accurate enough.The heat and humidity transfer in the fermentation is coupled,the relative humidity is relatively low in the middle layer with higher temperature,and the relative humidity is higher in the lower layer with lower temperature.At the same time,the temperature and humidity data of other undetected areas in the fermentation room were obtained by analyzing the temperature and humidity distribution laws and differences of the fermentation room environment at different fermentation stages.It provides a model reference for subsequent fermentation room risk control strategies,and provides a theoretical basis for further optimization study of the temperature and humidity sensor position.

关 键 词：大曲发酵 数值分析 温度场 湿度场 

分 类 号：TS261.11[轻工技术与工程—发酵工程]