独头巷道受限贴附射流有效射程的理论研究与数值计算

发布时间：2018-04-30 17:48

本文选题：独头巷道 + 受限贴附射流　；参考：《中国安全生产科学技术》2015年11期

【摘要】：为了探讨独头巷道受限贴附射流通风有效射程,利用巷道断面面积与风筒出流射流直径,定义了独头巷道射流的受限程度,采用理论分析与数值计算方法,推导了受限射流无因次距离与沿程断面位置、断面流量和断面平均流速之间的关系式,建立了独头巷道受限贴附射流流动特性模型。利用该模型,开展了8个不同工况下受限贴附射流的数值计算。结果表明,在受限的情况下,射流区无因次最大截面积出现在无因次距离为0.200 0处,而无因次最大截面流量位于无因次距离为0.187 5处。理论推导和计算结果表明,所得模型和计算方法能更为准确预测受限贴附射流的有效射程。
[Abstract]:In order to study the effective range of confined attached jet ventilation in single-headed roadway, the restricted degree of single-ended roadway jet was defined by using the cross-section area of roadway and the diameter of outlet jet, and the theoretical analysis and numerical calculation method were used. The relationship between the dimensionless distance of the confined jet and the position of the section along the path, the flow rate of the section and the average velocity of the section is derived, and the model of the flow characteristics of the confined attached jet in the single-headed roadway is established. Using this model, the numerical calculation of the limited attached jet under eight different working conditions has been carried out. The results show that the maximum dimensionless cross section area of the jet zone appears at the position of 0.200 dimensionless distance, while the dimensionless maximum cross-section flow rate lies at 0.187 5 in the dimensionless range. The theoretical derivation and calculation results show that the model and calculation method are more accurate to predict the effective range of the confined attached jet.
【作者单位】：湖南科技大学能源与安全工程学院;湖南省矿山通风与除尘装备工程技术研究中心;
【基金】：国家自然科学基金项目(U1361118) 湖南省自然科学基金项目(2015JJ2061) 湖南省教育厅资助项目(14C0425)
【分类号】：TD722

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