Computational studies of hydraulic stressors for biological performance assessment in a hydropower plant with Kaplan turbine

Singh, Rajesh; Romero-Gómez, Pedro; Colotelo, Alison H.; Perkins, William; Richmond, Marshall C.

doi:10.1016/j.renene.2022.09.016

Cited by 5 publications

(2 citation statements)

References 32 publications

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“…The latter modeling simplification poses the question about whether streamlines suffice for accurately representing pathways through turbine flows. Alternatives have been proposed, for instance, by using Lagrangian particles or by representing fish as discrete elements with consideration of their body length and explicit wall contact modeling [29]. Nevertheless, the accuracy of all trajectory approximation methods (streamlines, Lagrangian particles, and discrete elements) has not been put to the test by directly comparing passage simulation outcomes with corresponding field data.…”

Section: Passage Simulationsmentioning

confidence: 99%

“…This score serves as an indicator when comparing various operating conditions, distinctive turbine designs, or specific entrainment locations of passing fish. Simulation-based assessments of fish passage for different turbine types can be found in the work of Müller et al [26] and Zhu et al [27], who investigated the hydraulic parameters affecting fish survival through Francis-type turbines; Klopries and Schüttrumpf [28], who investigated the passage of European eels (Anguilla anguilla) through a bulb-type turbine; and Singh et al [29], who examined passage conditions through a very large Kaplan turbine by representing fish as Lagrangian particles. Simulation-based assessments have not yet been satisfactorily validated with SF field measurements.…”

Section: Introductionmentioning

confidence: 99%

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Sensor Fish Deployments at the Xayaburi Hydropower Plant: Measurements and Simulations

Romero-Gomez,

Poomchaivej,

Razdan

et al. 2024

Water

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Fish protection is a priority in regions with ongoing and planned development of hydropower production, like the Mekong River system. The evaluation of the effects of turbine passage on the survival of migratory fish is a primary task for informing hydropower plant operators and authorities about the environmental performance of plant operations. The present work characterizes low pressures and collision rates through the Kaplan-type runners of the Xayaburi hydropower station. Both an experimental method based on the deployment of Sensor Fish and a numerical strategy based on flow and passage simulations were implemented on the analysis of two release elevations at one operating point. Nadir pressures and pressure drops through the runner were very sensitive to release elevation, but collision rates on the runner were not. The latter showed a frequency of occurrence of 8.2–9.3%. Measured magnitudes validated the corresponding simulation outcomes in regard to the averaged magnitudes as well as to the variability. Central to this study is that simulations were conducted based on current industry practices for designing turbines. Therefore, the reported agreement helps turbine engineers gain certainty about the prediction power of flow and trajectory simulations for fish passage assessments. This can accelerate the development of environmentally enhanced technology with minimum impact on natural resources.

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Section: Passage Simulationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sensor Fish Deployments at the Xayaburi Hydropower Plant: Measurements and Simulations

Romero-Gomez,

Poomchaivej,

Razdan

et al. 2024

Water

Self Cite

View full text Add to dashboard Cite

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Computational studies of impurity migration during induction stirring of molten uranium

Singh

Corbey

Deshmukh

et al. 2023

Computational Materials Science

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Locomotion and strike damage of fish passing through a fish friendly tubular pump using computational fluid dynamics and discrete element coupling method

Pan,

Zou,

Zhang

et al. 2024

Physics of Fluids

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The tubular pump is a typical water transfer apparatus designed for extremely low heads and large flow rates. It serves as the core equipment in pumping stations situated at lakes, rivers, and canals. An adverse effect on the ecological environment stems from fish injury and mortality primarily caused by blade strikes. The present work combines computational fluid dynamics and the discrete element method to simulate the dynamics of fish passing through a simplified blade, allowing us to establish a safe margin of the strike force to further assess fish damage in a more complex tubular pump system. The results indicated that strikes on fish alter their motion state in terms of direction and magnitude, inducing chaotic movements that heighten the risk of subsequent strikes with downstream components. Fish tend to align their velocities with the surrounding fluid due to flow-induced drag after multiple contacts with solid structures. The knife-shaped leading edge, and particularly the blade tip side, emerged as the primary factor in creating strike damage, and the adoption of a slanted and blunt leading edge can effectively reduce fish damage. In addition, decreasing the shaft speed, increasing the flow rate, and restricting the fish size were identified as measures conducive to fish survival in running pumps. The study further suggested that using fewer but larger pumps operating at lower shaft speeds would contribute to better fish friendliness, which can also ensure a sufficient delivery head and mass flow rate.

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Computational studies of hydraulic stressors for biological performance assessment in a hydropower plant with Kaplan turbine

Cited by 5 publications

References 32 publications

Sensor Fish Deployments at the Xayaburi Hydropower Plant: Measurements and Simulations

Sensor Fish Deployments at the Xayaburi Hydropower Plant: Measurements and Simulations

Computational studies of impurity migration during induction stirring of molten uranium

Locomotion and strike damage of fish passing through a fish friendly tubular pump using computational fluid dynamics and discrete element coupling method

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