圆形喷嘴射流冲击平面特性研究  

Characteristic Research on Circular Nozzle Jet Impact Flat Surfece

作　　者：李东东 洪骏宇 Li Dongdong;Hong Junyu(Shanxi Coal Transportation and Sales Group Yuxian Hengtai Changshun Coal Industry Co.,Ltd.,Shanxi Yangquan 045199;Safety and Emergency Management Engineering School,Taiyuan University of Technology,Shanxi Taiyuan 030024)

机构地区：[1]山西煤炭运销集团盂县恒泰常顺煤业有限公司,山西阳泉045199 [2]太原理工大学安全与应急管理工程学院,山西太原030024

出　　处：《山东煤炭科技》2024年第8期82-87,98,共7页Shandong Coal Science and Technology

摘　　要：为了探究圆形喷嘴射流冲击平面的特性,旨在通过提高微孔隙、低渗透率煤层的渗透性,优化水力冲孔效果,通过数值仿真软件COMSOL Multiphysics,建立圆形喷嘴冲击平面的三维模型进行仿真,聚焦于喷嘴射流在不同倾斜角度、射流速度和喷嘴直径条件下对平面的冲击效果。结果显示,无论倾斜角度如何变化,射流到达平面的速度表现为先增后减再增最后减的变化趋势,压力值则随倾斜角度增大而先增后减。在不同射流速度下,冲击平面的速度分布相似,以最小速度点为圆心,沿半径方向速度快速增至峰值后逐渐减小。喷嘴直径的增大导致到达平面的最大压力值增大,而射流速度呈现复杂变化趋势。In order to explore the characteristics of circular nozzle jet impact flat surface,the aim is to improve the permeability of micro pores and low permeability coal seams,optimize the hydraulic punching effect,a 3D model of circular nozzle impact flat surface is established through numerical simulation software COMSOL Multiphysics for simulation.The focus is on the impact effect of nozzle jet on the flat surface under conditions of different inclination angles,jet velocity,and nozzle diameter.The results show that regardless of how the inclination angle changes,the velocity of the jet reaching the flat surface shows a variation trend of first increasing and then decreasing,then increasing and finally decreasing.The pressure value increases first and then decreases with the increase of inclination angle.Under different jet velocities,the velocity distribution of impact flat surface is similar,with the minimum velocity point as the center,and the velocity rapidly increases to the peak along the radius direction before gradually decreasing.The increase in nozzle diameter leads to an increase in the maximum pressure value reaching the flat surface,while the jet velocity shows a complex trend of variation.

关 键 词：水射流 倾斜角度 冲击速度 喷嘴直径 COMSOLMultiphysics 

分 类 号：TD713.3[矿业工程—矿井通风与安全]