摘要
煤矿降尘喷雾系统的核心部件为喷嘴,喷嘴的雾化效果直接影响降尘的效率和效果,为研究旋流喷嘴的雾化效果,利用Fluent仿真软件对喷嘴导流芯旋流腔圈数及喷嘴出口长径比进行数值仿真模拟,同时对喷嘴局部能量损失提出相应优化。结果显示:旋流状态下流体的平均出口速度可以大大提高,相同进口压力下随着旋流腔圈数的增多,流体出口速度会降低;喷嘴出口长径比对出口湍流动能影响较大,一定条件下增大长径比可以提高雾化效果;出口轮廓会影响喷嘴局部能量损失,收缩角局部设置成流线型能量损失减少。
The core component of the dustfall spray system is the nozzle. The atomization effect of the nozzle directly affects the efficiency and effectiveness of the dustfall. In order to study the atomization effect of the swirl nozzle, the Fluent simulation software is used to simulate the number of the swirl cavity and the nozzle outlet length diameter ratio of the nozzle core, and at the same time, the local energy loss of the nozzle is optimized correspondingly. The results show that: the average outlet velocity of the fluid can be greatly increased under the swirling state, and the outlet velocity will decrease with the increase of the number of swirling cavity circles under the same inlet pressure;the length diameter ratio of the nozzle outlet has a great influence on the turbulent kinetic energy at the outlet, and increasing the length diameter ratio can improve the atomization effect under certain conditions;the outlet profile will affect the local energy loss of the nozzle, and the contraction angle is set at a local value streamline reduces energy loss.
作者
王亮
史纪飞
郭炜舟
赵勋远
任伟健
WANG Liang;SHI Ji-fei;GUO Wei-zhou;ZHAO Xun-yuan;REN Wei-jian(Shandong University of Science and Technology,Qingdao 266590,China;Zhongtianhechuang Energy Co.,Ltd.,Ordos 152600,China)
出处
《煤炭技术》
CAS
北大核心
2021年第8期193-195,共3页
Coal Technology
基金
中天合创能源有限责任公司安全研发基金项目(ZTMT-2020-02-0862)。
关键词
喷嘴
旋流腔
长径比
Fluent仿真
nozzle
swirl chamber
ratio of length to diameter
Fluent simulation
