气固喷射器收缩型喷嘴的仿真模拟及实验  

Simulation and Experiment of Converging Nozzle in Gas-solid Injector

作　　者：张海峰 余柄辰 田世伟[2] 

机构地区：[1]山西中煤西沙河煤业有限公司,山西朔州036002 [2]中国矿业大学,江苏徐州221116

出　　处：《煤炭技术》2018年第1期245-247,共3页Coal Technology

摘　　要：为寻找影响气固喷射器喷射性能优劣的因素,基于颗粒轨迹模型对气固喷射器进行数值模拟,利用喷射器内部喷出颗粒数量、剩余颗粒数量以及颗粒运动轨迹对喷射性能进行分析,研究发现气固喷射器中收缩型喷嘴入口直径对喷射性能有一定影响。在仿真分析的基础上进行喷射实验,实验结果表明:当喷嘴入口直径处于20 mm时喷射效果最好,物料的平均喷射量达到3.37 m3/h,且喷射条件较稳定,基本符合气固喷射器生产能力的要求。To determine the key factors influencing the injection performance, the particle trajectory model was utilized as a means to perform simulations for the number of extrusive particles, the number of remaining particles and particle trajectories in the gas-solid injector. The results show that the nozzle＇s inlet diameter of the gas-solid injector is the factor that affects the injection performance. Based on simulation and analysis, a gas-solid injector test-bed was produced, and five groups experiment were carried out for different nozzle＇s inlet diameter. The experimental results indicate that the nozzle＇s inlet diameter is the factor influencing the injection performance. When the nozzle＇s inlet diameter at 20 mm, the average injection mass is maximum （3.37 m3/h）, the injection performance of gas-solid injector is remarkable and the injection condition is stable.

关 键 词：气力输送 气固喷射器 颗粒轨迹模型 喷嘴 

分 类 号：TH232[机械工程—机械制造及自动化] TB126[理学—工程力学]