Assessment of head loss coefficients for water turbine intake trash-racks by numerical modeling
| Autor: | Ivana Lučin, Lado Kranjčević, Zoran Čarija, Luka Grbčić |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0301 basic medicine
Trash-rack Water turbine Bar (music) Fish protection 03 medical and health sciences Hydraulic head Cross section (physics) 0302 clinical medicine Numerical modeling Fluid dynamics Range (statistics) lcsh:Science (General) ComputingMethodologies_COMPUTERGRAPHICS lcsh:R5-920 Multidisciplinary Mechanics Head-loss 030104 developmental biology trash-rack head-loss numerical modeling RANS model fish protection 030220 oncology & carcinogenesis Head (vessel) Environmental science Original Article lcsh:Medicine (General) Reduction (mathematics) lcsh:Q1-390 |
| Zdroj: | Journal of Advanced Research, Vol 21, Iss, Pp 109-119 (2020) Journal of Advanced Research |
| ISSN: | 2090-1232 |
| DOI: | 10.1016/j.jare.2019.10.010 |
| Popis: | Graphical abstract Highlights • Numerical modeling can be used to evaluate head losses for different trash-racks. • Rectangular bar cross section mostly generates greatest head-losses. • Change in bar cross sections can lead to considerable head-loss reduction. • Optimization can be conducted to provide innovative trash-rack design. In this work, numerical simulations of fluid flow around trash-rack for different bar cross sections are conducted to investigate cross section influence on head losses. Comparison with experimental data is conducted to validate the usage of numerical simulations which enable investigation of great number of trash-rack configurations. In previous experimental studies researchers mostly focused on trash-rack parameters (bar spacing, bar length, inclinations etc.) where bar cross section was mainly rectangular or streamlined shape. Therefore, 2D simulations for different cross sections are carried out for a range of trash-rack configurations in order to provide better insight how it affects energy losses. It is shown that head loss reduction due to change in cross section is greatly dependent on trash-rack configuration, therefore optimization of simplified real water turbine trash-rack is also conducted to produce the cross section that generates smallest head losses for given configuration. |
| Databáze: | OpenAIRE |
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