摘要
根据液固两相流理论对磨料水射流喷嘴内的流场进行了分析,并建立了喷嘴内流速度场的可视化模型,利用FLUENT分析软件求解磨料水射流喷嘴内各节点的速度。根据速度场分布图,讨论了影响磨粒速度的主要因素。研究表明,存在一个最优磨料喷嘴长度,使得磨料速度最大。喷嘴混合腔的长度对磨料粒子的加速有显著影响,为了达到最大磨料速度,磨料混合腔长度可在水射流喷嘴直径30~40倍的区间内选取。磨料粒子最高速度会随磨料混合腔内圆锥角的增加而降低。从降低喷嘴磨损角度看,应减小混合腔内锥角。
According to the theory of solid-fluid two phase flow, the flow field in the nozzle of abrasive water jet was analyzed.The visual model of flow field in the nozzle was established.The velocity of interior nodes inside the nozzle of abrasive water jet was calculated by using the FLUENT.According to the distribution map of velocity field, the major factors to affect velocity of abrasive particles were discussed.The suggestion to design of geometrical dimension of abrasive water jet nozzle was proposed.The res...
出处
《润滑与密封》
CAS
CSCD
北大核心
2008年第6期51-53,62,共4页
Lubrication Engineering
基金
人事部项目(07202081)
西华大学重点学科建设项目(SBZD0703-1)
关键词
两相流
磨料水射流
磨粒
流场
速度场
two phase flow
abrasive water jet
abrasive particle
flow field
velocity field
