Flow hydrodynamics near inlet key of Piano Key Weir (PKW)
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- 作者：HARINARAYAN TIWARI ; NAYAN SHARMA
- 关键词：Piano Key Weir ; hydrodynamic ; river ; turbulence ; LDV
- 刊名：Sadhana
- 出版年：2015
- 出版时间：October 2015
- 年：2015
- 卷：40
- 期：7
- 页码：2253-2261
- 全文大小：957 KB
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NAYAN SHARMA (1)
1. Department of Water Resources Development and Management, Indian Institute of Technology Roorkee, Roorkee, 247667, India - 刊物类别：Engineering
- 刊物主题：Engineering, general
- 出版者：Springer India, in co-publication with Indian Academy of Sciences
- ISSN：0973-7677
文摘
This paper presents fundamental outcomes from an experimental study on the hydrodynamic performance near inlet key of Piano Key Weir (PKW). Hydrodynamic performance was tested in a circulated open channel that comprised of PKW and sand bed (d50 = 0.25 mm). Instantaneous velocities were measured at 20 cross sections using Laser Doppler Velocimeter (LDV) with constant discharge and depth. Average velocity and turbulence intensities in both directions were investigated. Average longitudinal velocities are found very much consistent at every point and maximum around the midway of inlet key. In transverse direction, flow is bifurcating in two directions which are also confirmed by average transverse velocity estimation. Variation of turbulence intensity presents average 10 times higher transverse turbulence than longitudinal turbulence near inlet key of PKW.