文献类型：期刊文献

中文题名：颗粒入口条件对HVAF流场中颗粒轨迹的影响

英文题名：Influence of Particle Inlet Conditions on Particles Trajectories in HVAF Flow Field

作者：李海荣[1];王建文[1]

机构：[1]华东理工大学承压系统与安全教育部重点实验室,上海200237

年份：2014

卷号：40

期号：4

起止页码：515

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

语种：中文

中文关键词：计算流体力学;HVAF流场;送粉参数;WC-10Co4Cr颗粒

外文关键词：CFD; HVAF flow field; transporting power parameters; WC-10Co4Cr particles

摘要：运用计算流体力学对超音速空气火焰喷涂（HVAF）喷枪流场进行模拟,根据模拟结果选择恰当的送粉位置,并研究了入射角度（θ）、WC-10Co4Cr颗粒入射质量流量（M）、颗粒直径（D）、入射速度（v）对颗粒轨迹的影响。研究发现：送粉位置有两个选择点,即分别距离喷嘴5倍于喷嘴直径处和20倍于喷嘴直径处;入射角为30°~50°时颗粒飞行轨迹最佳,而入射角为10°和70°时均出现部分颗粒撞击壁面的情况;当质量流量为1g/s时,粒子在流场中的轨迹最佳;颗粒直径在50μm左右时粒子飞行的轨迹最好;当入射速度达到30m/s左右时,颗粒的飞行轨迹最佳;而入射速度超过35m/s后,会出现严重的颗粒相互撞击的现象。
Computational fluid dynamics was used in high velocity air-fuel spraying flow field simulation. The right place to transport powder was chosen according to the simulation results. The influence of injection angle （θ））, WC 10Co4Cr particles incident flow （M）, particle diameter （D）, and injection velocity （v） were studied. There are two places to inject powder, distance the nozzle length of 5 times the nozzle diameter and the length of 20 times. When injection angle ranges from 30° to 50°, WC- 10Co4Cr particles incident flow is 1 g/s, particle diameter is about 50μm, the flight trajectory is the best. When the velocity is about 30 m/s, trajectories of the particles is the best. However, there will be a serious phenomenon of particle collisions when the velocity is more than 35 m/s