Experimental study on dust-isolating of rotating air curtain at fully-mechanized work face
In order to investigate the dust-isolating mechanism and efficiency of rotating air curtain at fullymechanized work face,the dust distribution and the dust-isolating efficiency under the rotating air curtain was studied by model experiment.The results indicate:(1) Under the same working conditions,the dust-isolating efficiency of rotating air curtain is higher than the common air curtain,and the superiority of rotating air curtain is more evident in respirable dust.(2) The dust-isolating efficiency is closely related with the outlet air velocity,there is an optimum air velocity at which the rotating air curtain keeps a high dust-isolating efficiency for the total dust and the respirable dust.(3) When the outlet air velocity is below the optimum air velocity,the dust-isolating efficiencies of the total dust and the respirable dust raise significantly as the outlet air velocity increases.When the outlet air velocity is above the optimum air velocity,the dust-isolating efficiency of the total dust drops and the dust-isolating efficiency of the respirable dust raises slightly with the increase in the outlet air velocity.(4) As to the different dust particle size,there remains differences in the dust-isolating efficiency.The dust-isolating efficiency of rotating air curtain drops continually with the increase in the dust particle size.
fully-mechanized work facerotating air curtaindustnumerical simulationmode experiment
国家科技期刊平台
NSTL
万方数据
维普
