摘要
为了探究仔猪配奶罐中搅拌器参数对奶水搅拌效果的影响,设计了一种双层桨叶仔猪配奶罐,采用CFD数值模拟与响应面分析相结合方法,以转速、层间距、桨叶角度和离底距离为优化参数,以搅拌功率、混合时间和平均温升速率为响应指标,设计四因素三水平正交仿真试验,建立响应指标的回归模型,得到双层桨叶搅拌器的最优参数值。结果显示:转速和桨叶角度对搅拌功率的影响极显著,转速、层间距、桨叶角度和离底距离对混合时间影响极显著,转速对平均温升速率影响极显著,层间距和桨叶角度对平均温升速率影响显著,其中转速对搅拌器性能影响最大;响应面回归模型具有较好的拟合性,通过响应面回归模型得到最优的参数组合为转速80 r/min、层间距170 mm、桨叶角度30°、离底距离100 mm。与优化前相比,搅拌功率减小27.08%,混合时间减小70.15%,平均温升速率提升9.57%,且湍流动能云图分布和温度云图分布明显优于初选模型。
A double-layer paddle piglet milk mixing tank was designed to study the effects of agitator parameters in piglet milk mixing tank on mixing effect of milk.The method combining CFD numerical simulation and response surface analysis was used. A four factor and three-level orthogonal simulation experiment was designed by taking the rotating speed, layer spacing, paddle angle and distance from the bottom as the design optimization parameters, and the mixing power, mixing time and average temperature rise rate as the response indexes. The regression model of response index was established. The parameters of double-layer paddle agitator were optimized. The results showed that the rotating speed and blade angle significantly affected the mixing power. The rotating speed, layer spacing, blade angle and distance from the bottom had a significant impact on the time of mixing. The rotating speed had an extremely significant impact on the average rise rate of temperature. The layer spacing and blade angle had a significant impact on the average rise rate of temperature. The rotating speed had the greatest impact on the performance of the agitator. The response surface regression model had good fitting. The parameters optimized by the response surface regression model were the speed of 80 r/min, the layer spacing of 170 mm, the blade angle of 30°, and the distance from the bottom of 100 mm. Compared with that before optimization, the stirring power and the time of mixing was reduced by 27.08% and 70.15%, respectively. The average rise rate of temperature was increased by 9.57%.The cloud diagram distribution of turbulent flow energy and temperature were significantly better than those of the primary model. It will provide theoretical basis and reference for the design and application of agitator in piglet milk preparation tank.
作者
吴壮壮
牛智有
刘梅英
刘静
李洪成
WU Zhuangzhuang;NIU Zhiyou;LIU Meiying;LIU Jing;LI Hongcheng(College of Engineering/Ministry of Agriculture and Rural Areas Key Laboratory of Smart Farming for Agricultural Animals,Huazhong Agricultural University,Wuhan 430070,China)
出处
《华中农业大学学报》
CAS
CSCD
北大核心
2023年第1期248-257,共10页
Journal of Huazhong Agricultural University
基金
中央高校基本科研业务费专项(2662019PY065)。
关键词
配奶罐
搅拌器
搅拌性能
响应面法
CFD数值模拟
智慧养猪
milk preparation tank
agitator
mixing performance
response surface methodology
CFD numerical simulation
intelligent pig breeding
