基于气固两相流的粉尘质量浓度测量装置优化  

Structural optimization of dust concentration measuring device based on gas-solid two phase flow

作　　者：刘丹丹[1] 魏重宇 李德文[2,3] 滕昱玲 

机构地区：[1]黑龙江科技大学电气与控制工程学院,黑龙江哈尔滨150022 [2]中煤科工集团重庆研究院有限公司,重庆400037 [3]瓦斯灾害监控与应急技术国家重点实验室,重庆400039 [4]空军大连通信士官学校,辽宁大连116600

出　　处：《煤炭学报》2016年第7期1866-1870,共5页Journal of China Coal Society

基　　金：国家自然科学基金重点资助项目(U1261205);国家自然科学基金面上资助项目(51374099);重庆市自然科学基金资助项目(cstc2012jj A40023)

摘　　要：针对传统光散射粉尘测量仪易受粉尘污染的问题,利用Fluent软件对粉尘采集通道内的气固两相流进行数值仿真,通过粉尘颗粒的运动轨迹找出污染光学结构的因素,并重新设计合理的通道结构。从仿真数据看出当气流途经测量口处时产生了低速涡流,在其长期低速冲蚀下,造成测量口处粒子的残留堆积;经过项目组对测量结构的改进,设计了1种不易被粉尘污染的装置。仿真实验结果表明,这种新型的设计能使气流高速通过测量通道,并在测量口处产生了高速湍动涡流,使粒子不易在测量口处残留,从而保证了测量的准确性和时效性。The traditional light scattering measuring device could be polluted easily by dust. This study simulates the gas-solid two phase flow using Fluent software,and thus designs a more rational structure based on the influencing factors which are found from the analysis of particle trajectories. The numerical simulation experimental data shows that the low-velocity vortex is due to scouring the measurement structure by gas for a long time,and becoming polluted. A new structure is designed,which cannot be polluted easily. The experimental results show that this new design makes gas pass the channel speedily and form a turbulent vortex,so dust cannot be detained in the measuring device. This can ensure the veracity and timeliness of the measuring device.

关 键 词：污染 光散射 粉尘测量 数值仿真 气固两相流 

分 类 号：TD711.35[矿业工程—矿井通风与安全]