| 基于Fluent的高压水射流喷嘴优化模拟研究 |
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| 引用本文： | 刘文杰,' target='_blank'>,程晓阳,' target='_blank'>.基于Fluent的高压水射流喷嘴优化模拟研究[J].中州煤炭,2020,0(5):14-18. |
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| 作者姓名： | 刘文杰 ' target='_blank'> 程晓阳 ' target='_blank'> |
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| 作者单位： | （1.瓦斯灾害监控与应急技术国家重点实验室，重庆 400037； 2.中煤科工集团 重庆研究院有限公司，重庆 400037） |
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| 基金项目： | 国家重点研发计划资助项目(2018YFC0808305);国家“十三五”重点研发计划资助项目(2016YFC0801404);重庆市“科技创新领军人才支持计划”资助项目(CSTCKJCXLJRC14)。 |
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| 摘 要： | 为了提高高压水射流技术的破煤效率,采用Fluent软件对高压水射流的喷嘴结构和几何参数进行了优化模拟。通过分析水射流的轴向速度和壁面静压分布,选择了最佳的喷嘴结构和几何参数。结果表明:圆柱形喷嘴的最大射流速度发生在喷嘴内部,而锥形和锥直形喷嘴的最大射流速度发生在喷嘴外部,且锥形和锥直形喷嘴的最大射流速度和最大压力均明显大于圆柱形喷嘴,考虑到水射流的附壁效应,锥形喷嘴为最佳选择。锥形喷嘴的最优几何参数为:喷嘴出口直径3 mm,喷嘴锥角7°,喷嘴长度9 mm。高压水射流喷嘴的优化对提高煤层瓦斯抽采效率具有重要意义。
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| 关 键 词： | 高压水射流 喷嘴结构 几何参数 数值模拟 |
Simulation study on optimization of high pressure water jet nozzle based on Fluent |
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| Liu Wenjie,' target='_blank'>,Cheng Xiaoyang,' target='_blank'>. Simulation study on optimization of high pressure water jet nozzle based on Fluent[J].Zhongzhou Coal,2020,0(5):14-18. |
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| Authors: | Liu Wenjie ' target='_blank'> Cheng Xiaoyang ' target='_blank'> |
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| Affiliation: | （1.National Key Laboratory of Gas Disaster Detecting，Preventing and Emergency Controlling，Chongqing 400037，China；2.China Coal Technology Engineering Group Chongqing Research Institute，Chongqing 400037，China） |
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| Abstract: | In order to improve the coal breaking efficiency of high-pressure water jet technology，the structure and geometric parameters of the nozzle of high pressure water jet were optimized by using Fluent software.By analyzing the axial velocity of water jet and the wall static pressure distribution，the optimal nozzle structure and geometric parameters were selected.The results showed that the maximum jet velocity of the cylindrical nozzle occurs inside the nozzle，while the maximum jet velocity of the conical nozzle and the conical nozzle occurs outside the nozzle.The maximum jet velocity and the maximum pressure of the conical nozzle and the conical nozzle are obviously larger than that of the cylindrical nozzle.Considering the wall effect of the water jet，the conical nozzle is the best choice.The optimum geometric parameters of conical nozzle are as follows:nozzle outlet diameter 3 mm，nozzle cone angle 7 degrees，nozzle length 9 mm.The optimization of high pressure water jet nozzle is of great significance to improve the efficiency of coal seam gas extraction. |
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| Keywords: | ,high pressure water jet, nozzle structure, geometric parameters, numerical simulation |
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