摘要
针对我国农业用水较大、颗粒肥溶解不完全易对灌溉系统造成堵塞及混合液体混合不均等问题,设计一种新型混肥搅拌器。利用ANSYS对搅拌器的应力及模态进行分析;在FLUENT模块中,采用多重参考系(MRF)方法建立基础模型,利用欧拉方程与k-ɛ方程对混肥区域流场、流速和湍流动能进行模拟分析。结果表明:搅拌器变形区域主要集中在圆筒支撑上,其变形较小;搅拌器最低频率为30.536 Hz,外部激励与固有激励比值为1.7,则搅拌器与外部结构不会发生共振。对不同搅拌速度下的吸入及排出性能进行分析,对比搅拌器混合时间。当搅拌速度为800 r/min时,圆筒式搅拌器可表现出最优性能。
Aiming at the problems of large agricultural water consumption in China,incomplete dissolution of granular fertilizers that are prone to clogging of the irrigation system and uneven mixing of the mixed liquids,a new type of fertilizer mixer was designed.ANSYS was used to analyze the stress and modal state of the agitator,in FLUENT module,the multiple reference system(MRF)method was used to establish the base model,and Euler's equation and k-ɛequation were used to simulate and analyze the flow field,flow velocity and turbulence kinetic energy in the fertilizer mixing area.The results show that the deformation region of the agitator is mainly concentrated on the cylinder support,and its deformation is small,the lowest frequency of the agitator is 30.536 Hz,and the ratio of external excitation to intrinsic excitation is 1.7,then the agitator will not resonate with the external structure.The inhalation and discharge performances at different stirring speeds are analyzed,and the mixing time of the stirrer is also compared,and it is concluded that when the stirring speed is 800 r/min,the cylindrical stirrer can show optimal performance.
作者
王发好
张彩虹
王国强
姜鲁艳
刘昊
Wang Fahao;Zhang Caihong;Wang Guoqiang;Jiang Luyan;Liu Hao(College of Mechanical and Electrical Engineering,Xinjiang Agricultural University,Urumqi,830052,China;Institute of Agricultural Mechanization,Xinjiang Academy of Agricultural Sciences,Urumqi,830091,China;Xinjiang Facility Agriculture Engineering and Equipment Technology Research Center,Urumqi,830091,China)
出处
《中国农机化学报》
北大核心
2024年第10期60-68,共9页
Journal of Chinese Agricultural Mechanization
基金
新疆维吾尔自治区重大科技专项(2022A02005—6)。
关键词
灌溉施肥
搅拌器
数值模拟
流场分析
颗粒沉积
irrigation and fertilization
mixer
numerical simulation
flow field analysis
particle deposition
