Hydraulic performance of fish guidance structures with curved bars – Part 2: flow fields
OPEN ACCESS
Loading...
Author / Producer
Date
2020
Publication Type
Journal Article
ETH Bibliography
yes
Citations
Altmetric
OPEN ACCESS
Data
Abstract
The current geometric designs of fish guidance structures with vertical bars for run-of-river hydropower plants result in high head losses and asymmetric turbine admission flow. To address these issues, we develop innovative curved bar designs and experimentally investigate different rack configurations with curved bars in a laboratory flume. The present paper (Part II) focuses on the hydraulic performance of the novel curved bar designs with regard to flow fields, while the companion paper (Part I) reports the results on the head losses. The detailed flow fields obtained by 3D velocity measurements show that the curved bars promote flow conditions favourable for both fish guidance and turbine operation. The flow straightening effect of the curved bars leads to quasi-symmetrical turbine admission flow and reduced head losses. The findings are discussed with regard to fish protection and guidance, and optimal engineering application.
Permanent link
Publication status
published
External links
Editor
Book title
Journal / series
Volume
58 (5)
Pages / Article No.
819 - 830
Publisher
Taylor & Francis
Event
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
Curved-bar rack; fish downstream migration; fish guidance; flow field; hydraulic performance
Organisational unit
03820 - Boes, Robert / Boes, Robert
Notes
Funding
727830 - Fishfriendly Innovative Technologies for Hydropower (SBFI)
Related publications and datasets
Has part: