文献类型：期刊文献

中文题名：超音速火焰喷涂简化数学模型及其应用

英文题名：A Simplified Mathematical Model of Supersonic Flame Spraying Process and Its Application

作者：李会平[1];李冬生[2];张洋[1]

机构：[1]华东理工大学无机材料系,上海200237;[2]广州番禺骏业宏达洗染机械有限公司,广州511475

年份：2012

卷号：26

期号：18

起止页码：156

中文期刊名：材料导报

外文期刊名：Materials Reports

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：超音速火焰喷涂;焰流模型;粒子热力行为;喷涂参数;合理喷涂距离

外文关键词：supersonic flame spraying, flame model, particle dynamic and thermal behavior, spraying parame- ter, reasonable spraying distance

摘要：应用燃料燃烧理论、气体动力学和两相流原理,建立了超音速火焰喷涂焰流特性和粒子加速、加热行为的简化模型,并在计算机上进行了数值求解。研究了气、油质量比(空气过剩系数)对燃烧室焰流温度及相关参数的影响。结果表明,随着气、油质量比的增大,燃烧室焰流温度明显降低,因此气、油质量比不宜过大。另外,预热助燃气体是提高燃烧室焰流温度的重要措施。燃烧室焰流压力越快,焰流出枪速度越大,但焰流出枪温度越低。喷涂WC-Co系合金时,合理的燃烧室焰流压力约为0.6MPa。粒子出枪后,粒子速度和温度均先增大后降低,因此存在一个合理的喷涂距离。针对所研究的条件,合理的喷涂距离约为0.1m。
A simplified mathematical model of supersonic flame spraying process was set up by applying the fuel combustion, gas dynamic theories and two-phase flow principles, and solved numerically. The effect of mass ratio of the air to kerosene on the flame temperature and adiabatic index in combustion chamber was studied. The results show that with increasing the ratio of air to kerosene the flame temperature in combustion chamber decreases obviously and a reasonable ratio exists. The preheating of the air for combustion is an important measure for raising the flame tem perature in combustion chamber. The higher the flame pressure in combustion chamber, the higher the flame velocity after gun whereas the lower the flame temperature after gun. The reasonable flame pressure in combustion chamber is about 0.6MPa for spraying WC-Co alloys. The velocity and temperature of powder particle after gun first go up rapid- ly, and decrease when reaching maximum values. The reasonable spraying distance is about 0. lm.