数值模拟的验证和对由自我激发振荡诱导的冲动特征的实验
Qiang Wu1, Guodong Ji1, Jian Zhao2,3
1CNPC Engineering Technology R&D Company Limited, CNPC, Beijing, 102206, China.
Scientific reports
|March 6, 2024
概括
这项研究详细介绍了一种使用振荡腔产生的高频脉冲流的共振岩石破碎方法. 经过CFD模拟和实地测试验证的优化设计参数,增强脉冲频率并减少压力损失,以实现高效的岩石碎片化.
科学领域:
- 地质技术工程 地质技术工程
- 机械工程 机械工程
- 流体动力学 流体动力学
背景情况:
- 传统的岩石破碎方法在效率和环境影响方面存在局限性.
- 共振岩石破碎技术通过将工具频率与岩石的自然频率相匹配,提供了一种新的方法.
- 自激发的振荡腔是产生共振所需的高频脉冲流的关键.
研究的目的:
- 模拟和研究自兴振荡腔的流场和振荡机制,用于共振岩石破碎.
- 为了优化振荡腔的设计参数,以获得最大的冲动频率和最小的压力损失.
- 通过实地规模实验验证模拟模型.
主要方法:
- 计算流体动力学 (CFD) 使用大模拟方法来建模振荡腔内的流体动力学.
- 开发一个实地规模的测试装置来测量脉冲特征.
- 模拟结果的实验验证,侧重于脉冲频率和压力损失在不同的几何参数 (长度-直径比,腔体厚度) 和位移下.
主要成果:
- 由于脉冲振荡,观察到工具出口的流体偏移和低压的动态变化.
- 在长度-直径比为0.67时,可以达到最佳的脉冲频率,在更高的比率时,压力损失会增加.
- 洞穴厚度以复杂的模式 (降低-增加-降低) 影响了冲动频率,而位移始终增加了冲动频率和压力损失.
结论:
- 数字模拟结果与实验结果非常相匹配,验证了共振岩石破碎的理论模型.
- 设计参数显著影响振荡腔的性能,影响脉冲频率和压力损失.
- 这项研究为共振岩石破碎技术的实际实施和优化提供了关键的理论指导.
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