Banca de DEFESA: GUILHERME ANTÔNIO RIBEIRO DE SOUZA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : GUILHERME ANTÔNIO RIBEIRO DE SOUZA
DATA : 10/04/2019
HORA: 14:30
LOCAL: Prédio 12
TÍTULO:

Influence of hydraulic flow variables on the fish presence in an tailraces

PALAVRAS-CHAVES:

Computacional Fluid Dynamics (CFD), Acoustic telemetry, Factor analysis for mixed data, Hydroelectricity, Fish attraction

PÁGINAS: 50
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Civil
SUBÁREA: Engenharia Hidráulica
ESPECIALIDADE: Hidráulica
RESUMO:

Hydroelectricity is a significant source of electricity in many countries around the world. The block of the fish migration route is an environmental impact caused by hydroelectric power plants and the schools can accumulate in regions of the trailraces with no mitigation sctruture. The present work analyzed the influence of hydraulic variables of the tailrace flow on the fish presence in the Três Marias Hydroelectric Power Plant (Brazil). There 7 tons of fish were killed in 2007 during turbine shutdown and spillway opening. We compared velocity magnitude, vorticity magnitude, turbulent kinetic energy, turbulent intensity, energy dissipation rate and hydraulic strain rate along the flow, generated by a 3D hydrodynamic model in the Ansys software, to the presences of Pimelodus maculatus (mandi) and Prochilodus argenteus (curimba), obtained with previous study of acoustic telemetry. The results indicated a higher fish presence near Turbine 1, whose values of velocity, vorticity and hydraulic strain were higher than the other regions. The factorial analysis for mixed data found that the combination of turbulent kinetic energy, energy dissipation rate, turbulent intensity and vorticity explained 34.8% of the variance, followed by the combination of hydraulic rate, vorticity and velocity with 21.3%. In median terms, the variance was different for two species and the mandi navigated in points on diverse hydraulic patterns. It is concluded that the combination of hydraulic variables attracts both species to turbine 1area, an unsafe region for the permanence of the shoals.

  

MEMBROS DA BANCA:
Interno - HERSILIA DE ANDRADE E SANTOS
Interno - RAQUEL DINIZ OLIVEIRA
Interno - ROGERIO CABRAL DE AZEVEDO
Externo à Instituição - EDNA MARIA DE FARIA VIANA - UFMG