全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

基于分形理论的水流混掺长度垂线分布公式修正

DOI: 10.3969/j.issn.1674-0696.2014.03.16, PP. 67-71

Keywords: 水利工程,分形理论,线性分布式,抛物分布式,hydraulicengineering,fractaltheory,lineardistribution,parabolicdistribution

Full-Text   Cite this paper   Add to My Lib

Abstract:

:?已有的混掺长度公式形式多样,对于不同形式的水流需采用不同的经验常数。基于分形理论,结合挟沙水流的棍掺长度的运动机理理论,推导了一种植掺长度垂线分布公式的修正模式;分析了修正模式的提掺长度分维数的大小,指出了含沙量与由掺长度分维数的关系。实验数据验证表明:修正模式精度较好;与线性分布式、抛物分布式相比,修正分布模式最优。

References

[1]  Prandtl L.Uber die ausgebiidete turbulenz[J] .Zeitschrift für Angewandte Mathematik und Mechanik,1925,5:136-139.
[2]  Nikuradse J.粗糙管中水流的规律[M] .北京:水利出版社,1957.
[3]  Nikuradse J.Stromrngsgesetze in Rauhen Rohren[M] .Beijing:Water Conservancy Press,1957.
[4]  Van Driest E R.On turbulent flow near a wall[J] .Journal of the Aeronautical Sciences,1956,23(11):1007-1011.
[5]  倪晋仁,王光谦,张红武.固液两相流基本理论及其最新应用[M] .北京:科学出版社,1991.
[6]  Ni Jinren,Wang Guangqian,Zhang Hongwu.Basic Theory of TwoPhase Flow and Its New Application[M] .Beijing:Science Press,1991.
[7]  张小峰,谈广鸣.非均匀沙含沙量沿垂线分布特征[J] .水利学报,1992(10):48-52.
[8]  Zhang Xiaofeng,Tan Guangming.Non-uniform sediment characteristics of vertical distribution of concentration[J] .Journal of Hydraulic Engineering,1992(10):48-52.
[9]  Song Z Y,Yan Y X,Hao J L,et al.Study on the log-linear velocity profile of near-bed tidal current in estuarine and coastal waters[J] .China Ocean Engineering,2006,20(4):573-584.
[10]  Ni Zhihui,Song Zhiyao,Wu Lichun.An approach to separating the current velocity in estuarine and coastal waters[J] .Journal of Hydrodynamics,2009,21(4):512-519.
[11]  倪志辉,吴立春,宋志尧.近岸海域海面风速分布的预测方法研究[J] .空气动力学学报,2010,28(5):547-552.
[12]  Ni Zhihui,Wu Lichun,Song Zhiyao.A method of wind velocity distribution above the sea surface in near-shore waters[J] .Acta Aerodynamica Sinica,2010,28(5):547-552.
[13]  Vanoni V A.Transportation of suspended sediment by water[J] .Transactions of ASCE,1946,111:67-133.
[14]  Einstein H A.Effect of Heavy Sediment Concentration Near the Bed on the Velocity and Sediment Distribution[M] .Berkeley,California:Institute of Engineering Research,University of California,1955.
[15]  Castro I P,Epik E.Boundary-layer relaxation after a separated region[J] .Experimental Thermal and Fluid Science,1996,13(4):338-348.
[16]  杨大升,刘余滨,刘式适.动力气象学[M] .北京:气象出版社,1983.
[17]  Yang Dasheng,Liu Yubin,Liu Shishi.Dynamic Meteorology[M] .Beijing:China Meteorological Press,1983.
[18]  倪志辉,吴立春,舒小红.基于分形理论的挟沙水流掺混长度分析[J] .人民黄河,2009,31(9):32-33.
[19]  Ni Zhihui,Wu Lichun,Shu XiaoHong.The mixed length of the sediment-laden flow based on fractal theory[J] .Yellow River,2009,31(9):32-33.
[20]  严冰.粉沙质海岸泥沙运动及航道淤积机理研究[D] .天津:天津大学,2008.
[21]  Chien N,Wan Z H.Mechanics of Sediment Transport[M] .Reston:ASCE Press,1999.
[22]  严冰,张庆河.基于有限掺混长度概念的悬沙浓度垂线分布研究[J] .泥沙研究,2008(1):9-16.
[23]  Yan Bing,Zhang Qinghe.Distribution of vertical suspended sediment concentration based on the finite mixing length conception[J] .Journal of Sediment Research,2008(1):9-16
[24]  Yan Bing.Study of Sediment Transport and Channel Siltation on Silty Coast[D] .Tianjin:Tianjin University,2008.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133