超临界CO2直旋混合射流破岩特性的实验研究

田守嶒 张启龙 李根生 贺振国 刘晗 刘欣然

田守嶒, 张启龙, 李根生, 贺振国, 刘晗, 刘欣然. 超临界CO2直旋混合射流破岩特性的实验研究[J]. 爆炸与冲击, 2016, 36(2): 189-197. doi: 10.11883/1001-1455(2016)02-0189-09
引用本文: 田守嶒, 张启龙, 李根生, 贺振国, 刘晗, 刘欣然. 超临界CO2直旋混合射流破岩特性的实验研究[J]. 爆炸与冲击, 2016, 36(2): 189-197. doi: 10.11883/1001-1455(2016)02-0189-09
Tian Shouceng, Zhang Qilong, Li Gensheng, He Zhenguo, Liu Han, Liu Xinran. Experimental study on rock-erosion features with combined swirling and round jet of supercritical carbon dioxide[J]. Explosion And Shock Waves, 2016, 36(2): 189-197. doi: 10.11883/1001-1455(2016)02-0189-09
Citation: Tian Shouceng, Zhang Qilong, Li Gensheng, He Zhenguo, Liu Han, Liu Xinran. Experimental study on rock-erosion features with combined swirling and round jet of supercritical carbon dioxide[J]. Explosion And Shock Waves, 2016, 36(2): 189-197. doi: 10.11883/1001-1455(2016)02-0189-09

超临界CO2直旋混合射流破岩特性的实验研究

doi: 10.11883/1001-1455(2016)02-0189-09
基金项目: 

国家自然科学基金项目 51210006

国家自然科学基金项目 51490652

国家科技重大专项项目 2011ZX05009-005

国家重点基础研究发展计划(973计划)项目 2014CB239203

详细信息
    作者简介:

    田守嶒(1974—),男,博士,副研究员,tscsydx@163.com

  • 中图分类号: O383

Experimental study on rock-erosion features with combined swirling and round jet of supercritical carbon dioxide

  • 摘要: 超临界二氧化碳(CO2)射流破岩既能降低岩石门限压力又能有效保护储层,直旋混合射流兼具直射流和旋转射流特点可提高破岩效率,基于此提出了超临界CO2直旋混合射流的破岩方法。为了揭示超临界CO2直旋混合射流破岩特性,设计加工出叶轮式直旋混合射流喷嘴,通过岩石定点冲击破碎实验对比了该射流与常规水射流的破岩效果,并研究了叶轮长度、叶轮中心孔直径、混合腔长度、喷射距离、射流压力等重要参数对超临界CO2直旋混合射流破岩效果的影响。结果表明:相同实验条件下,该射流方法的平均破岩能力比常规水射流提高了42.9%;超临界CO2直旋混合射流破岩易出现较大体积岩屑崩落现象;随着叶轮长度、混合腔长度、喷射距离的增大破岩效果均先增强后减弱,实验条件下上述参数存在最优范围值;叶轮中心孔直径的增大会导致岩石破碎孔深度增加、直径减小;随着射流压力的升高,超临界CO2直旋混合射流破岩效果有着较为明显的提升。研究结果可为超临界CO2直旋混合射流破岩方法的进一步研究提供实验依据。
  • 图  1  超临界CO2喷射破岩实验系统

    Figure  1.  Rock erosion experiment system of supercritical carbon dioxide jet

    图  2  直旋混合喷嘴结构图

    Figure  2.  Structure of the combined swirling and round jet nozzle

    图  3  直旋混合喷嘴实体图

    Figure  3.  Stereogram of the combined swirling and round jet nozzles

    图  4  3种射流方案破岩效果对比

    Figure  4.  Comparison of rock-erosion between three jet schemes

    图  5  3种超临界CO2射流方案破破岩效果实体对比图

    Figure  5.  Stereogram of rock-erosion with three jets of supercritical carbon dioxide

    图  6  3种超临界CO2射流方案破岩效果对比

    Figure  6.  Comparison of rock-erosion between three jets of supercritical carbon dioxide

    图  7  破岩过程中大体积岩块崩落现象

    Figure  7.  Phenomenon of rock mass breakaway in rock-erosion process

    图  8  叶轮长度对射流破岩效果的影响

    Figure  8.  Effect of the impeller length on rock-erosion

    图  9  叶轮中心孔直径对射流破岩效果的影响

    Figure  9.  Effect of the impeller center hole diameter on rock-erosion

    图  10  混合腔长度对射流破岩效果的影响

    Figure  10.  Effect of the mixing chamber length on rock-erosion

    图  11  喷射距离对射流破岩效果的影响

    Figure  11.  Effect of the jet standoff on rock-erosion

    图  12  喷射压力对射流破岩效果的影响

    Figure  12.  Effect of the jet pressure on rock-erosion

    表  1  实验方案

    Table  1.   Experimental scheme

    岩石批号 L2 d1/mm L1/mm) H/mm p/MPa
    1 3, 4, 5, 6, 7 1.0 5 3 40
    1 5 0, 1.0, 1.5, 2.0 5 3 40
    1 5 1.5 3, 4, 5, 6 3 40
    2 5 1.5 5 1, 2, 3, 4, 5, 6 35
    2 5 1.5 5 4 20, 25, 30, 35, 40, 45
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出版历程
  • 收稿日期:  2014-09-19
  • 修回日期:  2015-01-20
  • 刊出日期:  2016-03-25

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