双峰型非均匀沙推移运动特性及输移规律

孙东坡; 刘明潇; 王鹏涛; 李国栋; 赵亚飞; 董明家

doi:10.14042/j.cnki.32.1309.2015.05.007

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双峰型非均匀沙推移运动特性及输移规律

孙东坡, 刘明潇, 王鹏涛, 李国栋, 赵亚飞, 董明家

文章导航 > 水科学进展 > 2015 > 26(5): 660-667

孙东坡, 刘明潇, 王鹏涛, 李国栋, 赵亚飞, 董明家. 双峰型非均匀沙推移运动特性及输移规律[J]. 水科学进展, 2015, 26(5): 660-667. doi: 10.14042/j.cnki.32.1309.2015.05.007

引用本文:

SUN Dongpo, LIU Mingxiao, WANG Pengtao, LI Guodong, ZHAO Yafei, DONG Mingjia. Movement characteristics and transport laws of the bimodal bed load[J]. Advances in Water Science, 2015, 26(5): 660-667. doi: 10.14042/j.cnki.32.1309.2015.05.007

Citation:

SUN Dongpo, LIU Mingxiao, WANG Pengtao, LI Guodong, ZHAO Yafei, DONG Mingjia. Movement characteristics and transport laws of the bimodal bed load[J]. Advances in Water Science, 2015, 26(5): 660-667. doi: 10.14042/j.cnki.32.1309.2015.05.007

双峰型非均匀沙推移运动特性及输移规律

doi: 10.14042/j.cnki.32.1309.2015.05.007

1.
华北水利水电大学水利学院, 河南郑州 450045;
2.
西安理工大学西北旱区生态水利工程国家重点实验室培育基地, 陕西西安 710048

基金项目: 国家自然科学基金重点资助项目(51039004);国家重点基础研究发展计划(973计划)资助项目(2011CB403305)

详细信息

作者简介:
孙东坡(1954—),男,河南开封人,教授,博士研究生导师,主要从事水力学及河流动力学研究.E-mail:psdp@163.com

通讯作者:
刘明潇,E-mail:elinunu@163.com

中图分类号: TV147

Movement characteristics and transport laws of the bimodal bed load

1.
College of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou 450045, China;
2.
State Key Laboratory Base of Eco-hydraulic Engineering in Arid Area, Xi'an University of Technology, Xi'an 710048, China

摘要: 采用图像识别与推移质动态监测技术,开展基于双峰型非均匀推移质的系列水槽试验.通过引入反映床面粗糙度、粘性底层特性与颗粒非均匀度η(粗细比)的综合水流强度函数Ψ_b、特征弗劳德数Fr_b,系统研究了不同水流强度与床沙组成条件下的推移质输移特性以及颗粒非均匀度对输沙率的影响.通过对关键因子的辨识与量纲分析,提出了双峰型非均匀推移质输移模式,建立了基于近壁特征因子的水流强度Ψ_b与非均匀推移质输移强度Φ'的函数关系.对双峰型底沙输移机理的分析表明,非均匀沙的组成特征使得η成为影响Φ'的重要参量;正是细粒对粗粒的解怙作用对粗沙运动产生重要影响,使推移质输移率与颗粒非均匀度间呈现驼峰关系,峰值对应的粗细比η_c约为3∶7.
- 颗粒非均匀度 /
- 综合水流强度 /
- 特征弗劳德数 /
- 粘性底层 /
- 量纲一输沙率
Abstract: The non-uniform bed load transport is a complicated coherent physical process of the fluid and solid in river. The research into the motion characteristics, transport laws as well as the action mechanism of influencing factors can help to not only complement the fundamental theories in river dynamics, and but also solve the urgent requirements from the practical engineering sediment. A series of flume experiments was carried out using the techniques of image recognition and instant monitoring for bed load. By introducing the comprehensive flow intensity Ψ_b which reflects the thickness ratio of the bed η, properties of the viscous sublayer, the characteristic Froude number Fr_b, the transport characteristics of the non-uniform bed load with a bimodal distribution were investigated under several conditions such as different flow intensities and various compositions of bed material, with the effect of particle non-uniformity on transport rate of bed load being especially considered. By means of key factor identification and dimensional analysis, the transport mode of the non-uniform bimodal bed load was proposed. A formula for calculating the transport intensity of bed load was developed, which is expressed as a dimensionless function of the transport intensity Φ' and comprehensive flow intensity Ψ_b based on characteristic factors near the bed. An analysis of the transport mechanism of the bimodal bed load indicates that the ratio of coarse to fine particles in the composition properties of the non-uniform sediment is an important parameter affecting the value Φ'. It is found that the collapsing effect of fine particles on coarse particles has an important influence on the movement of coarse particles, and therefore, the transport rates of bimodal bed load present a hump curve with the variation in the degrees of particle non-uniformity, wit the corresponding η_c of about 3∶7 for the peak rate.
- particle non-uniformity /
- comprehensive flow intensity /
- characteristic Froude number /
- viscous sublayer /
- dimensionless transport rate of bed load

[1]	谭高文, 韩昌海, 韩康, 余凯文. 低弗劳德数水流二级消力池水力特性试验研究 . 水科学进展, 2020, 31(1): 71-80. doi: 10.14042/j.cnki.32.1309.2020.01.008
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[4]	许琳娟, 曹文洪, 刘春晶. 非均匀沙运动特性试验 . 水科学进展, 2016, 27(6): 841-848. doi: 10.14042/j.cnki.32.1309.2016.06.006
[5]	柴朝晖, 杨国录, 王茜, 余明辉. 紊流对粘性细颗粒泥沙絮凝影响 . 水科学进展, 2012, 23(6): 808-814. doi: CNKI: 32.1309.P.20121101.1757.011
[6]	王立辉, 潘存鸿, 吴修广, 潘冬子, 于普兵. 非粘性沙坝溃决数学模型及求解 . 水科学进展, 2011, 22(6): 859-863.
[7]	魏红艳, 余明辉, 梁艳洁. 无粘性土堤漫顶溃决水流运动试验研究 . 水科学进展, 2011, 22(4): 532-538.
[8]	程永舟, 王永学, 蒋昌波, 陈纯. 浅水非线性波作用下沙纹床面底层流动特性试验研究 . 水科学进展, 2007, 18(6): 801-806.
[9]	李文萍, 曹叔尤, 刘兴年. 泥沙颗粒形状对非均匀沙起动条件的影响 . 水科学进展, 2007, 18(3): 342-345.
[10]	韩其为. 水量百分数的概念及在非均匀悬移质输沙中的应用 . 水科学进展, 2007, 18(5): 633-640.
[11]	陈前海, 方红卫, 王光谦. 三门峡库区一维非恒定非均匀泥沙输移数学模型 . 水科学进展, 2004, 15(2): 160-164.
[12]	蒋昌波, 白玉川, 赵子丹, 张红武. 波浪作用下沙纹床面底层流动特性研究 . 水科学进展, 2003, 14(3): 333-340.
[13]	蒋昌波, 白玉川, 赵子丹, 张红武. 振荡流底层悬沙运动的数值研究 . 水科学进展, 2003, 14(2): 136-142.
[14]	李丹勋, 王兴奎, 禹明忠. 悬移质颗粒运动的脉动强度 . 水科学进展, 2002, 13(2): 146-152.
[15]	李丹勋, 王兴奎, 禹明忠. 悬移质运动增强水流紊动强度的一个必要条件 . 水科学进展, 2002, 13(4): 416-419.
[16]	钟德钰, 王士强, 王光谦. 细颗粒对粗颗粒床沙质输沙率影响的初步研究 . 水科学进展, 2001, 12(1): 1-6.
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[20]	郭俊克, 惠遇甲. Einstein床沙质输移理论的再研究——关于细颗粒床沙质输沙率的计算 . 水科学进展, 1991, 2(2): 81-91.

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双峰型非均匀沙推移运动特性及输移规律

doi: 10.14042/j.cnki.32.1309.2015.05.007

1. 华北水利水电大学水利学院, 河南郑州 450045;

2. 西安理工大学西北旱区生态水利工程国家重点实验室培育基地, 陕西西安 710048

基金项目: 国家自然科学基金重点资助项目(51039004);国家重点基础研究发展计划(973计划)资助项目(2011CB403305)

作者简介:
孙东坡(1954—),男,河南开封人,教授,博士研究生导师,主要从事水力学及河流动力学研究.E-mail:psdp@163.com

通讯作者: 刘明潇,E-mail:elinunu@163.com

收稿日期: 2014-11-27
刊出日期: 2015-09-25

中图分类号: TV147

关键词:

摘要: 采用图像识别与推移质动态监测技术,开展基于双峰型非均匀推移质的系列水槽试验.通过引入反映床面粗糙度、粘性底层特性与颗粒非均匀度η(粗细比)的综合水流强度函数Ψ_b、特征弗劳德数Fr_b,系统研究了不同水流强度与床沙组成条件下的推移质输移特性以及颗粒非均匀度对输沙率的影响.通过对关键因子的辨识与量纲分析,提出了双峰型非均匀推移质输移模式,建立了基于近壁特征因子的水流强度Ψ_b与非均匀推移质输移强度Φ'的函数关系.对双峰型底沙输移机理的分析表明,非均匀沙的组成特征使得η成为影响Φ'的重要参量;正是细粒对粗粒的解怙作用对粗沙运动产生重要影响,使推移质输移率与颗粒非均匀度间呈现驼峰关系,峰值对应的粗细比η_c约为3∶7.

English Abstract

Movement characteristics and transport laws of the bimodal bed load

1. College of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou 450045, China;

2. State Key Laboratory Base of Eco-hydraulic Engineering in Arid Area, Xi'an University of Technology, Xi'an 710048, China

Received Date: 2014-11-27
Publish Date: 2015-09-25

Keywords:

particle non-uniformity /
comprehensive flow intensity /
characteristic Froude number /
viscous sublayer /
dimensionless transport rate of bed load

Abstract: The non-uniform bed load transport is a complicated coherent physical process of the fluid and solid in river. The research into the motion characteristics, transport laws as well as the action mechanism of influencing factors can help to not only complement the fundamental theories in river dynamics, and but also solve the urgent requirements from the practical engineering sediment. A series of flume experiments was carried out using the techniques of image recognition and instant monitoring for bed load. By introducing the comprehensive flow intensity Ψ_b which reflects the thickness ratio of the bed η, properties of the viscous sublayer, the characteristic Froude number Fr_b, the transport characteristics of the non-uniform bed load with a bimodal distribution were investigated under several conditions such as different flow intensities and various compositions of bed material, with the effect of particle non-uniformity on transport rate of bed load being especially considered. By means of key factor identification and dimensional analysis, the transport mode of the non-uniform bimodal bed load was proposed. A formula for calculating the transport intensity of bed load was developed, which is expressed as a dimensionless function of the transport intensity Φ' and comprehensive flow intensity Ψ_b based on characteristic factors near the bed. An analysis of the transport mechanism of the bimodal bed load indicates that the ratio of coarse to fine particles in the composition properties of the non-uniform sediment is an important parameter affecting the value Φ'. It is found that the collapsing effect of fine particles on coarse particles has an important influence on the movement of coarse particles, and therefore, the transport rates of bimodal bed load present a hump curve with the variation in the degrees of particle non-uniformity, wit the corresponding η_c of about 3∶7 for the peak rate.

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双峰型非均匀沙推移运动特性及输移规律

doi: 10.14042/j.cnki.32.1309.2015.05.007

作者简介: 孙东坡(1954—),男,河南开封人,教授,博士研究生导师,主要从事水力学及河流动力学研究.E-mail:psdp@163.com

通讯作者: 刘明潇,E-mail:elinunu@163.com

Movement characteristics and transport laws of the bimodal bed load

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出版历程

双峰型非均匀沙推移运动特性及输移规律

doi: 10.14042/j.cnki.32.1309.2015.05.007

1. 华北水利水电大学水利学院, 河南 郑州 450045; 2. 西安理工大学西北旱区生态水利工程国家重点实验室培育基地, 陕西 西安 710048

作者简介: 孙东坡(1954—),男,河南开封人,教授,博士研究生导师,主要从事水力学及河流动力学研究.E-mail:psdp@163.com

通讯作者: 刘明潇,E-mail:elinunu@163.com

English Abstract

Movement characteristics and transport laws of the bimodal bed load

1. College of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou 450045, China; 2. State Key Laboratory Base of Eco-hydraulic Engineering in Arid Area, Xi'an University of Technology, Xi'an 710048, China

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作者简介:
孙东坡(1954—),男,河南开封人,教授,博士研究生导师,主要从事水力学及河流动力学研究.E-mail:psdp@163.com

通讯作者:
刘明潇,E-mail:elinunu@163.com

1. 华北水利水电大学水利学院, 河南郑州 450045;

2. 西安理工大学西北旱区生态水利工程国家重点实验室培育基地, 陕西西安 710048

作者简介:
孙东坡(1954—),男,河南开封人,教授,博士研究生导师,主要从事水力学及河流动力学研究.E-mail:psdp@163.com

1. College of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou 450045, China;

2. State Key Laboratory Base of Eco-hydraulic Engineering in Arid Area, Xi'an University of Technology, Xi'an 710048, China