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三峡工程 2

三峡 1

全衬砌船闸 1

冲刷 1

变顶高尾水洞 1

坝下游河道冲刷 1

坝后背管 1

大孔口重力坝 1

库区泥沙淤积 1

数学模型 1

水位下降 1

物理模型 1

稳定拱 1

船闸与航道 1

葛洲坝枢纽 1

试验性蓄水 1

锂；动力电池；产业链；高质量发展 1

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Phosphorus release potential and pollution characteristics of sediment in downstream Nansi Lake, China

Zhijian LI, Qinyan YUE, Baoyu GAO, Yanwen WANG, Qing LIU

《环境科学与工程前沿（英文）》 2012年第6卷第2期页码 162-170 doi: 10.1007/s11783-011-0313-7

摘要： The research aimed to evaluate present and potential phosphorous pollution due to high sedimentary phosphorus load and release from sediment, when external phosphorus was reduced in downstream Nansi Lake. Pollution load of the sediment and overlying water was investigated. Kinetics and isotherms of adsorption/release of sedimentary phosphorus were studied to determine equilibrium phosphate concentration (EPC ) and release potential. Kinetics of phosphorus adsorption on sediment and release from sediment were well described by both the pseudo-first-order rate equation and the pseudo-second-order rate equation, but more appropriate to the pseudo-second-order rate equation with the adsorption/release capacity more close to the measured values, suggesting that the processes were chemically rate controlled and dependent on adsorption capacity. Soluble reactive phosphorus (SRP) sorption isotherms on sediment were best fitted by the modified Langmuir model indicating a monolayer adsorption. By comparing EPC and SRP of water, the status (adsorption, releasing or in equilibrium) of sediment phosphorus could be determined. The sediments at site S1, S3, S4, S5, and S7 where the EPC s were greater than the SRPs, had a potential to release phosphorus into the water column. However, those sediments at S9, S10, and S12, where the EPC s were approximately equal to the SRPs, were in impermanent equilibrium with overlying water in status of phosphorus, the sediments can be likely to release phosphorus to the water column once the equilibrium was broken. Therefore, sedimentary phosphorus can be a secondary pollution source in downstream Nansi Lake.

关键词： Nansi Lake sediment phosphorus release potential equilibrium phosphate concentration

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三峡工程蓄水运用后水库泥沙淤积及坝下游河道冲刷分析

卢金友,黄悦,王军

《中国工程科学》 2011年第13卷第7期页码 129-136

摘要：

根据三峡工程蓄水运用后的实测资料，简述三峡库区泥沙淤积、坝下游河道冲刷，并与论证阶段的研究成果进行对比。分析认为三峡工程蓄水运用8年，水库泥沙淤积及坝下游河道冲刷等出现的情况尚在原预测范围之内，表明原预测的研究成果可行；本次实测与预测对比，在时间上略显短促，仍需今后观测并作进一步对比；今后应加强原型观测及有关研究工作。

关键词：三峡工程试验性蓄水库区泥沙淤积坝下游河道冲刷

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Lagrangian simulation of deposition of CO gas-solid sudden expansion flow

HUANG Dongping, DING Guoliang, QUACK Hans

《能源前沿（英文）》 2008年第2卷第2期页码 216-221 doi: 10.1007/s11708-008-0032-3

摘要： Freezing and blockage resulting from the deposition of solid CO formed because of sudden expansion of the downstream pipe during the release of CO through safety valves, will endanger the protected equipment. To overcome this problem, the characteristics of the CO gas-solid sudden expansion flow are studied by using the disperse Lagrangian model. A comparison of the calculated deposition of the solid CO with the experimental results shows that they are in reasonable agreement. The simulation results show that the size of the solid CO formed should not be in the range of 0.04–0.07 mm ( number 3.2–9.8). This can be achieved by using an appropriate flow cross section of the safety valve.

关键词： comparison gas-solid downstream blockage Lagrangian

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Experimental study on flow behavior at open channel confluences

WANG Xiekang, WANG Xianye, LU Weizhen, LIU Tonghuan

《结构与土木工程前沿（英文）》 2007年第1卷第2期页码 211-216 doi: 10.1007/s11709-007-0025-z

摘要： Channel confluences are common in natural rivers and hydraulic engineering, and the flow behavior at confluences becomes very complex because of the interaction between the tributary and the main river. In this study, the experiments were performed in a combined flume with a 30º angle between the main and tributary flume located at Sichuan University. The velocity was measured by using a three-component acoustic Doppler velocimeter (ADV) over a grid defined throughout the junction region. Based on the analysis of the velocity at the confluence, the distinctive characteristics of a channel confluence flow may be divided into several zones including a zone of separation immediately downstream of the junction branch channel, the maximum and minimum velocity regions at the upstream and downstream in the confluent channel, and a shear plane developed between the two combining flows downstream of the confluent channel. In addition, secondary circulations in different directions at the higher and lower velocity zones are observed as well.

关键词： ADV different interaction separation downstream

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三峡工程水工建筑物关键技术

钮新强

《工程（英文）》 2016年第2卷第3期页码 340-349 doi: 10.1016/J.ENG.2016.03.006

摘要：

三峡工程是治理和开发长江的关键性骨干工程，是当今世界最大的水利枢纽工程。其工程规模和综合效益巨大，工程技术复杂，设计难度超出了世界已建水利水电工程，在工程设计研究过程中提出并运用了一系列新的设计理论和方法，攻克了多层大孔口泄水重力坝、巨型机组水电站、高水头大型连续多级船闸等重要水工建筑物的多项关键技术难题。

关键词：三峡大孔口重力坝坝后背管变顶高尾水洞稳定拱全衬砌船闸

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我国锂及其下游动力电池产业链发展探讨

邢佳韵,陈其慎,张艳飞,于汶加,龙涛,郑国栋,王琨

《中国工程科学》 2022年第24卷第3期页码 10-19 doi: 10.15302/J-SSCAE-2022.03.002

摘要：

锂及其下游动力电池产业链的高质量发展，对支撑我国经济转型升级、保障战略性新兴产业平稳发展起到关键作用。本文梳理了锂及其下游动力电池产业链的构成，涵盖资源端、冶炼加工端、关键材料与产品端、循环利用端四部分，据此阐述了相关产业链高质量发展的必要性及其基本状况。研究发现，受自然、生态等约束，国内锂矿扩产受到限制；国际性的资源争夺导致我国海外进口风险剧增；正极材料、电解液等核心专利处于被国外公司垄断局面；关键材料与电池技术相比国际先进水平存在一定差距，新兴技术方向的积累薄弱；废旧动力电池资源二次回收体系不完备，产业秩序有待规范。着眼锂及其下游动力电池产业链的高质量发展，论证了2025 年、2035 年的阶段发展目标，提出了采取多维度构建安全稳定的资源供应体系、攻关关键材料和电池新技术并强化锂电技术体系及人才储备、围绕关键材料与产品实施创新以带动产业链各环节协同发展的建设路径。研究建议，注重顶层设计的完备性，形成全产业链一体化管理模式；合理加大资金支持力度，促进基础研究与应用研究水平互促提升；鼓励上、下游环节的企业开展合作，增强产业链协同效应；强化“产学研”合作，培育产业链复合型科技人才。

关键词：锂；动力电池；产业链；高质量发展

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三峡工程对葛洲坝枢纽下游近坝段水位与航道影响研究

陆永军,陈稚聪,赵连白,邵学军,杨美卿,李云中

《中国工程科学》 2002年第4卷第10期页码 67-72

摘要：

根据实测地形和水文泥沙资料，分析了葛洲坝枢纽运用后宜昌河段的河床冲淤变化、推移质和床沙的粗化以及枯水位的变化。由数学模型计算和物理模型试验成果，预测了三峡工程施工期及初期运用阶段葛洲坝枢纽近坝段水位下降及对通航的影响。

关键词：葛洲坝枢纽三峡工程冲刷水位下降船闸与航道数学模型物理模型