Numerical study on the transient flow in a six-nozzle Pelton turbine during the load rejection process DOI
Xiaodong Wang, Xiaowen Huang,

S. Hu

et al.

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(4)

Published: April 1, 2025

The development of a novel electricity system integrating hydropower, wind, solar, and energy storage requires enhanced rapid-response capabilities from hydropower units, which are expected to undergo prolonged transitional processes. Pelton turbines, equipped with dual regulation comprising needles deflectors, offer significant advantages in maintaining stability during However, the transient flow hydrodynamic characteristics turbine load rejection remain inadequately understood. This study employs one-dimensional method coupled three-dimensional computational fluid dynamics numerically investigate process turbine. results reveal that deflector-jet interference causes pressure fluctuations water supply system, maximum amplitude reaching 5% gross head. deflector alters jet direction, simultaneously exerts braking effect on runner's rotation increase radial force runner, by an order magnitude. Moreover, peak rotational speed runner observed at similar opening, independent initial closure scheme.

Language: Английский

Numerical study on the transient flow in a six-nozzle Pelton turbine during the load rejection process DOI
Xiaodong Wang, Xiaowen Huang,

S. Hu

et al.

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(4)

Published: April 1, 2025

The development of a novel electricity system integrating hydropower, wind, solar, and energy storage requires enhanced rapid-response capabilities from hydropower units, which are expected to undergo prolonged transitional processes. Pelton turbines, equipped with dual regulation comprising needles deflectors, offer significant advantages in maintaining stability during However, the transient flow hydrodynamic characteristics turbine load rejection remain inadequately understood. This study employs one-dimensional method coupled three-dimensional computational fluid dynamics numerically investigate process turbine. results reveal that deflector-jet interference causes pressure fluctuations water supply system, maximum amplitude reaching 5% gross head. deflector alters jet direction, simultaneously exerts braking effect on runner's rotation increase radial force runner, by an order magnitude. Moreover, peak rotational speed runner observed at similar opening, independent initial closure scheme.

Language: Английский

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