摘要
针对高压射流均质机的关键部件射流阀内部结构,结合Griffith的强度理论和计算流体力学的数值模拟,深入分析了超微粉碎的作用形式和效果。结果表明,在液流加速进入阀孔阶段,压力梯度、空化效应是液流中的悬浮物破碎的关键机制;阀孔喷出后的湍流碰撞与摩擦和靶板撞击作用强化了破碎效果,这为高压射流超微粉碎技术研究与高压射流均质机改进提供了依据。
According to Griffith＇ s theory and computer fluid dynamics analysis,the mode and effect of ultramicropulverization of high pressure jet homogenizer were studied.The research indicated that pressure gradient and cavitations played the key role in the ultramicro-pulverization process during the granules suspended in liquid pass quickly the valve hole, and the subsequent turbulence and impinging enhanced the effect of ultramicropulverization. The research is beneficial for the crushing technology and optimization of high pressure jet homogenizer.
出处
《食品工业科技》
CAS
CSCD
北大核心
2009年第10期279-281,284,共4页
Science and Technology of Food Industry
基金
北京市中青年骨干教师项目资助
关键词
高压射流均质机
射流阀
压力梯度
空化作用
high pressure jet homogenizer
jet homogenizer valve
pressure aradient
cavitation
