基于CFD的新型风幕控尘装置的模拟研究及其应用

摘要

针对传统风幕控尘装置设备多、空间小、掘进机移动不便等诸多不足之处,对其进行了优化设计.为确保新型风幕控尘装置的实际应用效果,指导现场防尘系统设计,确定抽出式风机风筒安设位置,依据山西某矿掘进巷道工作面1:1建立了物理几何模型,并利用计算流体动力学(CFD)进行模拟.根据湍流模型特性及流体运动特点,选取拉格朗日法离散相模型对掘进巷道粉尘浓度分布进行了模拟分析并进行现场实践.结果显示,所选物理几何模型参数设置合理,拟合精度达到预测要求;加装新型风幕控尘装置前后,粉尘浓度下降对比明显;距底板2.1m处安设抽出式风机风筒时,系统降尘效果显著.%The design of a traditional wind curtain dust control device was optimized to overcome its short comings of more equipment,little space,inconvenience in tunnel boring machine's move,etc.In order to ensure the wind curtain dust control device's dust removal effect in practical application,guide the dust control system's design on the spot,and determine the draw-out fan's setting position,a physical and geometrical model was set up according to the roadway head of a Shanxi mine with the proportion of 1 ∶ 1,and the simulation was conducted by using the computational fluid dynamics (CFD).According to the characteristics of the turbulence model and fluid motion,a Lagrange Discrete Phase Model was selected to simulate and analyze the driving airway dust concentration,and the site practice was conducted.The simulation results showed that the parameters of the physical and geometrical model were selected reasonably,and the fitting precision met the prediction requirement;and the dust concentration decreased obviously after the installation of the new wind curtain dust control device,with the obvious dust-reducing effect if the extraction fans duct was installed at 2.1 m from the botton.