磨料形状对磨料气体射流冲蚀性能的影响研究

发布时间：2018-06-07 00:17

本文选题：水射流 + 磨料气体射流　；参考：《中国安全生产科学技术》2017年11期

【摘要】：为明确磨料形状对高压磨料气体射流冲蚀效果的影响规律,基于LS-DYNA数值分析了磨料冲蚀靶体应力分布,根据横向裂纹和纵向裂纹建立了考虑磨料球形度的磨料射流冲蚀体积计算模型;分析了磨料形状的球形度,通过高压磨料气体射流破岩实验得出了磨料形状对冲蚀体积影响规律;对比分析理论计算结果和实验数据,验证计算模型吻合度较高,模型数学形式简单,且具有较好的工程适用性;结合理论分析和实验结果得出,磨料形状对冲蚀效果具有显著影响,随磨料球形度的增大,冲蚀体积呈指数增加;在相同冲蚀粒子数以及冲击动能情况下,磨料粒子球形度越高,棱角越尖锐,冲蚀体积越大。为高压磨料气体射流的磨料优选提供理论依据,冲蚀性能预测提供简易算法。
[Abstract]:In order to understand the influence of abrasive shape on the erosion effect of high pressure abrasive gas jet, the stress distribution of abrasive erosion target was analyzed based on LS-DYNA. Based on the transverse and longitudinal cracks, a calculation model of abrasive jet erosion volume considering abrasive sphericity is established, and the sphericity of abrasive shape is analyzed. The influence of abrasive shape on the erosion volume is obtained through the rock breaking experiment of high pressure abrasive gas jet, the theoretical calculation results and experimental data are compared and analyzed, and it is verified that the calculation model is in good agreement, and the mathematical form of the model is simple. Combined with the theoretical analysis and experimental results, the abrasive shape has a significant impact on the erosion effect, and the erosion volume increases exponentially with the increase of the abrasive sphericity. Under the condition of the same number of erosion particles and impingement kinetic energy, the higher the spherical degree of abrasive particles, the sharper the angle and the larger the erosion volume. It provides a theoretical basis for abrasive selection of high pressure abrasive gas jet and a simple algorithm for predicting erosion performance.
【作者单位】：河南省瓦斯地质与瓦斯治理重点实验室(省部共建国家重点实验室培育基地);河南理工大学安全科学与工程学院;煤炭安全生产河南省协同创新中心;
【基金】：国家自然科学基金项目(51704096) 煤矿灾害动力学与控制国家重点实验室访问学者基金项目(2011DA105287-FW201601) 河南省瓦斯地质与瓦斯治理重点实验室开放课题(WS2017A02)
【分类号】：TD712.6

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