| 圆锥形喷嘴出口直径对水射流冲击动力特性的影响研究* |
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| 引用本文： | 韩培壮,高亚斌,王飞,向鑫,郭晓亚.圆锥形喷嘴出口直径对水射流冲击动力特性的影响研究*[J].中国安全生产科学技术,2022,18(7):75-80. |
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| 作者姓名： | 韩培壮 高亚斌 王飞 向鑫 郭晓亚 |
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| 作者单位： | （1.太原理工大学 安全与应急管理工程学院，山西 太原 030024；2.山西煤矿安全研究生教育创新中心，山西 太原 030024) |
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| 基金项目： | *基金项目: 国家自然科学基金项目（51804212）；山西省高等学校青年科研人员培育计划项目（jyt20190003） |
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| 摘 要： | 为探讨喷嘴结构对水射流冲击动力特性的影响，以圆锥形喷嘴为研究对象，基于COMSOL数值模拟软件，建立不同出口直径的圆锥形喷嘴模型，研究出口直径对水射流冲击动力特性的影响。研究结果表明:圆锥形喷嘴水射流冲击煤岩体过程中，不同喷嘴出口直径下水射流流场分布特征相似，整个流场可分为集中区、发散区、回流区和卷吸区4个区域，随喷嘴出口直径增大，卷吸区逐渐消失，其余3个区域分布也明显减弱；煤岩体应力分布可分为中心应力集中区和两侧应力集中区，随喷嘴出口直径不断增大，中心应力集中区与两侧应力集中区的范围逐渐减小，当喷嘴出口直径为6 mm时，两侧应力集中区基本消失；主体段入口速度恒定条件下，圆锥形喷嘴优选以2~3 mm出口直径为宜，此时水射流冲击煤岩体效果较佳，且不会对喷嘴产生结构破坏。
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| 关 键 词： | 水射流技术 圆锥形喷嘴 出口直径 流场分布 煤岩体应力分布 |
Study on influence of outlet diameter of conical nozzle on impact dynamic characteristics of water jet |
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| HAN Peizhuang,GAO Yabin,WANG Fei,XIANG Xin,GUO Xiaoya.Study on influence of outlet diameter of conical nozzle on impact dynamic characteristics of water jet[J].Journal of Safety Science and Technology,2022,18(7):75-80. |
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| Authors: | HAN Peizhuang GAO Yabin WANG Fei XIANG Xin GUO Xiaoya |
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| Affiliation: | (1.School of Safety and Emergency Management Engineering,Taiyuan University of Technology,Taiyuan Shanxi 030024,China;2.Shanxi Coal Mine Safety Graduate Education Innovation Center,Taiyuan Shanxi 030024,China) |
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| Abstract: | In order to explore the influence of nozzle structure on the impact dynamic characteristics of water jet,taking the conical nozzle as the research object,the models of conical nozzle with different outlet diameters were established by COMSOL numerical simulation software to study the influence of outlet diameter on the impact dynamic characteristics of water jet.The results showed that in the process of conical nozzle water jet impacting coal and rock mass,the distribution characteristics of water jet flow field were similar under different nozzle outlet diameters,and the whole flow field could be divided into four regions: concentration region,divergence region,reflux region and entrainment region.With the increase of nozzle outlet diameter,the entrainment region gradually disappeared,and the distribution of the other three regions was also significantly weakened.The stress distribution of coal and rock mass could be divided into central stress concentration area and two sides stress concentration area.With the increase of nozzle outlet diameter,the ranges of central stress concentration area and two sides stress concentration area decreased gradually,and when the nozzle outlet diameter was 6 mm,the two sides stress concentration area basically disappeared.Under the condition of constant inlet velocity of the main section,the conical nozzle was preferably with 2~3 mm outlet diameter.At this time,the effect of water jet impacting coal and rock mass was the best,and it would not cause structural damage to the nozzle. |
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| Keywords: | water jet technology conical nozzle outlet diameter flow field distribution coal and rock mass stress distribution |
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