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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water engineering : Discharge coefficients of piano key weirs from experimental and numerical models
Discharge coefficients of piano key weirs from experimental and numerical models
Author : MARIO OERTEL(1)
ABSTRACT
Piano Key Weirs (PKW) are relative new hydraulic structures of the labyrinth weir family. Their aim is to increase
discharge capacities and hence to reduce upstream water levels in reservoirs or general flow systems. PKWs are in the
focus of research investigations for some ten years and especially experimental models are used to determine discharge
coefficients. During the last years also numerical 3D simulations are compared with those results from physical model
tests. The present paper investigates results from a scaled experimental model and analyzes discharge coefficients of
various PKW structures. The research focuses on the comparison of discharge coefficients for PKWs without and with
geometrical adaptions at the downstream end at the top of the structure. Therefore, an investigation program is carried out
to analyze the upstream free surface profiles and their influence on resulting discharge coefficients. Additionally, discharge
coefficients from experimental models and numerical 3D simulations are compared to test the applicability of a chosen
numerical VOF code. Therefore, the numerical model is an upscaled copy of the experimental model
File Size : 811,816 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water engineering
Date Published : 28/08/2015
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