1. School of Electrical and Control Engineering,Heilongjiang University of Science and Technology,Harbin　 150022,China;2. China Coal Technology Engi-neering Group Chongqing Research Institute, Chongqing 　 400037, China; 3. State Key Lab. of Methane Disaster Monitoring & Emergency Technology, Chongqing　 400039,China;4. Dalian Airforce Communication NCO Academy,Dalian　 116600,China

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 fac- tors 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.

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(cstc2012jjA40023)；

Liu Dandan,Wei Chongyu,Li Dewen,et al. Structural optimization of dust concentration measuring device based on gas-solid two phase flow[J]. Journal of China Coal Society,2016,41(7):1866-1870.