疏浚工程中珊瑚礁碎块管道输送临界流速数值研究

发布时间：2018-04-18 04:19

本文选题：珊瑚礁碎块 + 水力输送　；参考：《水运工程》2017年06期

【摘要】：以疏浚过程中珊瑚礁碎块在管道内固液两相流的运动规律为背景,通过建立流固耦合数值分析模型,研究珊瑚礁碎块密度、粒径以及浆体浓度对水平管道输送过程中固体颗粒的动力特性。结果表明:珊瑚礁碎块密度与粒径越小、浆体浓度越大,碎块颗粒的临界流速越小;珊瑚礁碎块密度与粒径越大、浆体浓度越小,碎块颗粒需要的临界流速就越大。基于数值计算结果,拟合珊瑚礁碎块临界流速计算公式,并利用数值计算结果对该公式进行验证,其平均误差在15%以内。
[Abstract]:Based on the motion law of coral reef debris in pipeline during dredging process, the density of coral reef debris is studied by establishing a numerical analysis model of fluid-solid coupling.The effect of particle size and slurry concentration on the dynamic characteristics of solid particles in horizontal pipeline transportation.The results show that the smaller the density and particle size of coral reef debris, the greater the slurry concentration, the smaller the critical flow velocity of debris particles, and the greater the density and particle size of coral reef fragments, the smaller the slurry concentration, the higher the critical velocity required for debris particles.Based on the results of numerical calculation, the formula for calculating critical velocity of coral reef fragments is fitted, and the formula is verified by the results of numerical calculation. The average error is less than 15%.
【作者单位】：中国海洋大学工程学院;中交天津航道局有限公司;
【基金】：国家科技支撑计划(2014BAB16B03) 国家自然科学基金项目(51679224)
【分类号】：U616.24

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