Research on the turbulent aggregation mechanism of the dust-containing pollutants under water spray suppression at the working face in the underground cavern of hydropower station
Dust hazards caused by drilling, blasting and tunneling in underground engineering have not been effectively solved for a long time.Dust removal is one of the most important problems in underground space construction.In this paper, the phenomenon of dust trapping by droplets in atomized dust removal is studied by using the population balance model.Two dimensional and three dimensional physical models are established.The Luo aggregation model and Turbulent aggregation model are used to simulate the phenomenon.It is found that the air distribution has a great influence on the Turbulent aggregation between particles.Due to the disturbance of the flow field, the particles with different sizes have a better mixing effect, which improves the possibility of collision and aggregation to a certain extent.Luo aggregation model assumes that the average turbulent distance of particles is larger than the distance between particles, and that the phase of particles is sparse in reality, so the calculated value of collision frequency of particles is larger than the actual value.Comparing the numerical simulation with the experimental data in the literature, it is found that the Turbulent aggregation model has higher fitting degree than the Luo aggregation model.
Atomization spray dedusting Population balance model Turbulence aggregation Kernel function
Pei Wang Shuai Shen Deyou Liu Ling Zhou
College of Energy and Electrical Engineering, Hohai University, Nanjing 211100, P.R.China College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, P.R.China
国际会议
法国巴黎
英文
291-297
2019-03-13（万方平台首次上网日期，不代表论文的发表时间）