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关于混凝土四面体截流材料的探讨 被引量:8
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作者 蔡启龙 严毅 刘锦碧 《水利水电科技进展》 CSCD 北大核心 2006年第6期62-65,共4页
通过对比混凝土四面体与特大块石这两种截流材料的抗冲稳定性和施工的方便性,分析了混凝土四面体截流材料在工程应用中存在的问题。指出:①混凝土四面体密度、综合稳定系数、化引球形粒径都偏小,在龙口的抗冲稳定性不如特大块石;②混凝... 通过对比混凝土四面体与特大块石这两种截流材料的抗冲稳定性和施工的方便性,分析了混凝土四面体截流材料在工程应用中存在的问题。指出:①混凝土四面体密度、综合稳定系数、化引球形粒径都偏小,在龙口的抗冲稳定性不如特大块石;②混凝土四面体制作麻烦,成本高,占地面积大,装运困难,抛投强度低,施工不如特大块石方便;③在截流施工中宜优先使用特大块石,慎用混凝土四面体。 展开更多
关键词 截流材料 混凝土四面体 大块石料 抗冲稳定性 截流施工
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透水四面体截流材料的稳定性试验研究 被引量:1
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作者 尹杨松 李登松 +2 位作者 杨庆 戴光清 杜震宇 《东北水利水电》 2017年第1期44-47,共4页
实体四面体结构的人工预制抛投材料在截流工程中广泛应用于代替大质量的天然块石,具有透水性的四面体结构则在江河堤岸的防冲促淤中广泛使用,且效果甚佳。文中通过物理模型试验,结合透水四面体结构的特点和截流工程理论,研究了材料在水... 实体四面体结构的人工预制抛投材料在截流工程中广泛应用于代替大质量的天然块石,具有透水性的四面体结构则在江河堤岸的防冲促淤中广泛使用,且效果甚佳。文中通过物理模型试验,结合透水四面体结构的特点和截流工程理论,研究了材料在水中的稳定特性,与实体四面体结构进行了对比。探讨了透水四面体在截流工程中的应用可能性。研究结果表明:透水四面体的表面开孔率对落水后的稳定性有较大的影响;开孔率为32.15%时稳定性最优,且止动流速与实体四面体基本相当;流场特性优于实体四面体,有效减轻了漩涡造成的不利影响。适当提高人工预制截流材料的透水性,提升稳定性的新途径是可借鉴的。 展开更多
关键词 透水四面体 稳定性 物理模型试验 截流材料
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松花江大顶子山航电枢纽工程土建A标截流施工
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作者 苏子博 《中国水运(下半月)》 2013年第10期174-175,162,共3页
文中详细介绍了松花江大顶子山航电枢纽工程土建A标截流施工时的龙口位置的选择、截流方式、截流水利学计算及截流材料粒径的确定。由于采用了合理的施工方案且截流水利学计算准确,施工达到了预期的效果,保证了施工工期和施工安全。
关键词 截流 戗堤 龙口 流量 立堵 平抛护底 截流材料粒径
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An improved CFD model of gas flow and particle interception in a fiber material 被引量:2
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作者 Zhiwei Sun Jianhui Wen +3 位作者 Xiao Luo Wen Du Zhiwu Liang Kaiyun Fu 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2017年第3期264-273,共10页
An improved CFD model of gas flow and particle interception in a fiber material which fiber size is Y-shape was developed in this work. The porous medium model was used to build the model of the whole size of fiber fi... An improved CFD model of gas flow and particle interception in a fiber material which fiber size is Y-shape was developed in this work. The porous medium model was used to build the model of the whole size of fiber filter medium. Mixture model was adopted. The algorithm of particle interception in the whole size of fiber filter medium was derived and UDF(User Defined Function) that described kinds of particle filtering mechanisms in filter fibrous media was added to the Fluent default conservation equation as source term for simulation. The inertial resistance of the filter was taken into consideration, which provided a more precise measurement of the smoke flow and the particle interception in the filter under higher smoke speed conditions. The commercial software, Fluent 6.3, was used to simulate the smoke flow and particle interception in the filter in a single suction. The velocity and pressure profiles of smoke or nicotine particle in the filter, as well as nicotine particle volume fraction profile were well simulated. Finally, the comparisons of nicotine particle filtration efficiency between Fluent simulation results in this work and experimental results, as well as the model prediction in the literature were made to validate the simulation model. The comparisons showed that the particle entrapment model from simulation results was in good agreement with that from the experimental results. In addition, the Fluent simulation results are closer to reality both at the beginning and the end of the smoke process comparing with the model predicted results in the literature. 展开更多
关键词 Numerical simulation Y-shape fiber Particle interception Flow field distribution Filtration efficiency UDF
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