Study on Effects of Roughness Patterns on Turbulent Structure though Field Measurements

现场测量研究粗糙度模式对湍流结构的影响

基本信息

  • 批准号:
    03650418
  • 负责人:
  • 金额:
    $ 1.02万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
  • 财政年份:
    1991
  • 资助国家:
    日本
  • 起止时间:
    1991 至 1992
  • 项目状态:
    已结题

项目摘要

Because of recent wide purpose of river improvements, we should know more about the flow structure with various patterns of roughness. In fact, river improvement in mountain regions needs the knowledge on the flow with small relative submergence. For designing various types of structures in rivers, the flow must experience various patterns of spatial change of roughness, and thus the transient process of turbulent flow for spatial change of roughness should be studied. The river improvement with special respect with environments, the flow with vegetation should be accurately evaluated.In this research project, the approach based on theoretical analysis and fundamental experiments in laboratories was coupled with field measurements of turbulence. Recent development of anemometers and data-recording and processing system have made field measurements comparatively easy. We have developed the system of field measurements of turbulence with aid of electromagnetic anemometers, and carefully selected the measuring sites in rivers or irrigation canals. The flow with small relative submergence, hekicoidal fluid motion of flow over skew arrangement of strip roughness, the flow over vegetation, the flow with spatial change of bed roughness, the flow with vegetation zone in a cross section have been selected and the measurements in fields and in laboratories have been compared to confirm the similarity of the turbulent phenomena. With valuable data obtained in fields and laboratories, the effects of roughness patterns in open-channel flows have been investigated through data analyses and comparison of the data with laboratory data and the results of analytical or numerical approaches.
由于近年来河道整治的广泛性,我们需要更多地了解各种糙率下的水流结构。事实上,山区河流治理需要了解相对淹没度较小的水流。为了设计各种类型的河流建筑物,水流必须经历不同的糙率空间变化模式,因此必须研究糙率空间变化的紊流过渡过程。本研究采用理论分析和室内基础实验相结合的方法,结合湍流的实测资料,对河流生态环境的改善、植被对水流的影响进行了研究。最近发展的风速计和数据记录和处理系统使现场测量相对容易。我们开发了一套利用电磁风速仪进行湍流测量的系统,并在河流或灌溉渠中仔细选择了测量点。选择了相对淹没度小的水流、斜置粗糙度上的六角流体运动、植物上的水流、河床粗糙度空间变化的水流、断面上有植物带的水流,并将野外和实验室的测量结果进行了比较,以证实湍流现象的相似性。本文利用野外和实验室获得的有价值的资料,通过资料分析,并与实验室资料和解析或数值方法的结果进行比较,研究了糙率型式对明渠水流的影响。

项目成果

期刊论文数量(34)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Tsujimoto, T. and A. Saito: "Non-equilibrium transport of suspended sediment" J.Hydroscience & Hydraul. Eng., JSCE. Vol.19,No.2. 1-20 (1991)
Tsujimoto, T. 和 A. Saito:“悬浮沉积物的非平衡输送” J.Hydroscience
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  • 影响因子:
    0
  • 作者:
  • 通讯作者:
Tsujimoto, T.: "Spectral analysis of velocity and watersurface fluctuations appearing in an open channel flow with vegetated and non-vegetated regions in a cross section" Proc. 6th Int. Sym. Stochastic Hydraul., Taipei, ROC. 361-368 (1992)
Tsujimoto, T.:“横截面上有植被和非植被区域的明渠流中出现的速度和水面波动的光谱分析”Proc。
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    0
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Tsujimoto,T.,Shimizu,Y.,Nakagawa,H.: "Concentration distribution of suspended sediment transport in vegetated sand beb channel" Proc.Int.Transport of Suspended Sediments & Its Mathematical Modelling,Florence,Italy. 51-58 (1991)
Tsujimoto,T.,Shimizu,Y.,Nakakawa,H.:“植被沙河道中悬浮沉积物输送的浓度分布”Proc.Int.悬浮沉积物的输送
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    0
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Tsujimoto,T.: "Mixing process in open channel with vegetated region" Proc.Int.Sym.Environmemtal Hydraulics,Hong Kong. 409-414 (1991)
Tsujimoto,T.:“明渠与植被区域的混合过程”Proc.Int.Sym.Environmemtal Hydros,香港。
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  • 影响因子:
    0
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  • 通讯作者:
Tsujimoto, T., Y. Shimizu, T. Kitamura and T. Okada: "Turbulent flow over bed covered by rigid vegetation" J.Hydroscience & Hydraul. Eng., JSCE. Vol.10, No.2. 1 (1992)
Tsujimoto, T.、Y. Shimizu、T. Kitamura 和 T. Okada:“被刚性植被覆盖的河床上的湍流” J.Hydroscience
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  • 影响因子:
    0
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TSUJIMOTO Tetsuro其他文献

TSUJIMOTO Tetsuro的其他文献

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{{ truncateString('TSUJIMOTO Tetsuro', 18)}}的其他基金

Modeling of Sediment Dynamics According to Geological Heterogeneity of River Basin with Particular References to Sorting, Abrasion and Confluence Processes
根据流域地质非均质性的沉积物动力学建模,特别是分选、磨损和汇流过程
  • 批准号:
    22656108
  • 财政年份:
    2010
  • 资助金额:
    $ 1.02万
  • 项目类别:
    Grant-in-Aid for Challenging Exploratory Research
Study on Mechanisms of Material Cycling in River Ecosystem with Water, Material and Organism Dynamics
河流生态系统物质循环机制与水、物质和生物动力学研究
  • 批准号:
    19360223
  • 财政年份:
    2007
  • 资助金额:
    $ 1.02万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Dynamic conservation mechanism of temporal water area and its roles in preservation of riparian ecosystem
时域水域动态保护机制及其在河岸生态系统保护中的作用
  • 批准号:
    14350264
  • 财政年份:
    2002
  • 资助金额:
    $ 1.02万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Study on Disaster caused by Heavy rainfall in Tokai Region, Japan at September 2001
2001年9月日本东海地区强降雨灾害研究
  • 批准号:
    12800012
  • 财政年份:
    2000
  • 资助金额:
    $ 1.02万
  • 项目类别:
    Grant-in-Aid for Special Purpose.
Study on Change in River Landscape in Alluvial Fun Rivers and Its Restoration
冲积乐趣河河流景观变化及其恢复研究
  • 批准号:
    11650523
  • 财政年份:
    1999
  • 资助金额:
    $ 1.02万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Study on the method to estimate the subsurface flow in alluvial sandbars
冲积沙洲地下流量估算方法研究
  • 批准号:
    11555133
  • 财政年份:
    1999
  • 资助金额:
    $ 1.02万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B).
Mechanism of blown sand with vegetation of coastal area from multi-phase flow dynamics and methods of blown-sand control
从多相流动力学角度探讨沿海植被风沙机理及风沙控制方法
  • 批准号:
    08650593
  • 财政年份:
    1996
  • 资助金额:
    $ 1.02万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Design of Erosion-Protection of Flood Plain and Side Slope of Levee by Vegetation
河滩及堤岸边坡植被防冲刷设计
  • 批准号:
    07555452
  • 财政年份:
    1995
  • 资助金额:
    $ 1.02万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Open-Channel Flow Control by Vegetation and Artificial Roughness and Hydraulic Design of Multi-Function Channels
植被和人工粗糙度明渠流量控制及多功能渠道水力设计
  • 批准号:
    06650558
  • 财政年份:
    1994
  • 资助金额:
    $ 1.02万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
Mechanics of Sediment Transport of Graded Materials and Fluvial Sorting
分级材料输沙机理及河流分选
  • 批准号:
    01550401
  • 财政年份:
    1989
  • 资助金额:
    $ 1.02万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)

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