摘要
针对砻谷时砻谷室内温度过高造成糙米破碎率高的问题,开展了砻谷室温度场流场分析与结构改进设计,砻谷时砻谷室温度场流场试验发现砻谷室内温度较高,糙米温升大于16℃且砻谷室内温度高达55.9℃,砻谷区域下方风速较小,吸风口风速最大,平均达到16.35m/s,建立砻谷室内流体有限元模型,进行砻谷室温度场流场数值模拟,发现砻谷室内温度较高且流场混乱,通过在砻谷室上方添加吸风口、改变出风口位置等改进设计,再对改进后的砻谷室模型进行温度场流场数值模拟,结果表明,改进后砻谷室内气流流动情况有极大改善,砻谷室内气流平稳均匀且内外气流交换明显,砻谷室内温度明显降低。该研究结果为砻谷室温度场流场研究、降低糙米破碎率及提高谷糙分离度提供参考。
In order to solve the problem of high breaken rate of brown rice caused by high temperature in the rice hulling room,the flow field analysis and structural improvement design of the temperature field in the rice hulling room were carried out.The flow field test of the temperature field in the rice hulling room showed that the temperature in the rice hulling room was high,the temper-ature rise of brown rice was greater than 16℃and the temperature in the rice hulling room was as high as 55.9℃.The wind speed below the rice hulling area was small,and the wind speed at the suction port was the largest,reaching an average of 16.35m/s.The finite element model of the fluid in the rice hulling room was established.The numerical simulation of the temperature field in the rice hulling room was carried out.It was found that the temperature in the rice hulling room was high and the flow field was chaotic.Then,the numerical simulation of temperature field and flow field of the improved rice husker model was carried out.The results showed that the air flow in the improved rice husker was greatly improved.The airflow in the rice husker was stable and uni-form,and the internal and external airflow exchange was obvious.The temperature in the rice husker was significantly reduced.The results provide a reference for the study of temperature field and flow field in rice hull,reducing the broken rate of brown rice and improving the separation degree of brown rice.
作者
郑睿恺
廖敏
李修银
冯叶陶
ZHENG Ruikai;LIAO Min;LI Xiuyin;FENG Yetao(Institute of Modern Agricultural Equipment,Xihua University,Sichuan Chengdu 610039,China;School of Mechanical Engineering,Xihua University,Sichuan Chengdu 610039,China)
出处
《机械设计与制造》
北大核心
2025年第11期113-116,共4页
Machinery Design & Manufacture
基金
四川省科技厅项目(2019YFN0106
2021YFN0020)。
关键词
砻谷室
流场
温度场
数值模拟
Ridge Room
Flow Field
Temperature Field
Numerical Simulation
