摘要
根据微射流均质机的工作原理,将物料的粉碎过程分成3个阶段:进入阀孔段、经过和离开阀孔段和靶板撞击段,结合Griffith的强度理论和流体动力学的数值模拟,对各段的超微粉碎作用形式和效果进行分析。结果表明,在液流加速进入阀孔阶段,压力梯度、空化效应是料液中的悬浮物破碎的关键机制;经阀孔喷出段的湍流碰撞与摩擦加剧了颗粒的剪切破碎;靶板撞击段强化了破碎效果。
The pulverization of high pressure jet homogenizer was divided into three parts： feeding zone, passing and discharging zone, and impinging zone. According to Griffith＇ s theory and computer fluid dynamics simulation, the mode and effection of ultramicro-pulverization was studied. The research indicates that pressure gradient and cavitation play the key role in the ultramicro-pulverization process during the granules suspended in liquid pass quickly the valve hole, and the subsequent turbulence,friction and impinging enhance the effect of pulverization.
出处
《食品与机械》
CSCD
北大核心
2009年第3期65-68,共4页
Food and Machinery
关键词
射流均质机
超微粉碎
流体动力学
数值模拟
Jet homogenizer
Ultramicro-pulverization
Fluid dynamics
Simulation
