TY -非盟的刘永盟——张,胡安盟——张道盟——张,惠东PY - 2018 DA - 2018/10/30 TI -最优喷嘴结构的磨料气射流对岩石破碎SP - 9457178六世- 2018 AB -磨料气射流技术是有效的和有益的,广泛用于钻金属和玻璃基板。当进口压力增加,气体喷射可以强大到足以打破岩石。他们有潜在用途在煤层气勘探和开采由于其独一无二的流体喷射钻井,避免水侵和井眼坍塌。提高岩石破碎的效率使用研磨气体喷射未来煤层气勘探是一个重要的先决条件。喷嘴结构是至关重要的流场和侵蚀率。此外,优化喷嘴结构提高岩石破碎的效率是至关重要的。通过结合空气动力学和修复钻头喷嘴的状况,我们初步设计四种类型的喷嘴。侵蚀率的四个喷嘴由数值模拟计算,使我们能够得出这样的结论:一个喷嘴3马赫最多能诱发侵蚀时是25 MPa的压力。更高的压力不能提高侵蚀率,因为屏蔽效应降低能量的影响。较小的压力不能加速侵蚀率,因为短的气体膨胀波和低速度飞机。 An optimal nozzle structure is promoted with extended expansion waves and less obvious shield effects. To further optimize the nozzle structure, erosion rates at various conditions are calculated using the single-variable method. The optimal nozzle structure is achieved by comparing the erosion rates of different nozzle structures. The experimental results on rock erosion are in good agreement with the numerical simulations. The optimal nozzle thus creates maximum erosion volume and depth. SN - 1468-8115 UR - https://doi.org/10.1155/2018/9457178 DO - 10.1155/2018/9457178 JF - Geofluids PB - Hindawi KW - ER -