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| Description
| - Dynamic characteristic of the hydraulic and mechanical solution for any Pelton turbine depends on a lot of various effects. The paper presents basic steps of the hydraulic design of the horizontal three nozzles Pelton turbine as well as an analysis of the bucket excitation in dependence on the pitch angle of the nozzles. The numerical modelling of the energy transfer from the jet to the runner was simulated based on application of Euler turbine equation. The evaluation of the numerical flow simulation was applied for the determination of following nozzles pitch angle. The basic condition applied for the solution is that the water, which flows from the previous nozzle, has not any significant contact with the water flowing from the following nozzle. In that way the optimised pitch angle between following buckets has been determined. A static pressure distribution over the turbine bucket by numerical simulation has been carried out. The excitation of the bucket was evaluated by a numerical integration of the static pressure at the bucket. It is evident that for different nozzles pitch angles there appear the same signals in the same time in different positions at the runner according to different positions of individual nozzles. In that way a phase angle appears between these signals, and the bucket excitation is affected by the phase angle. The phase angle could be modified by nozzles pitch angle modifications and high frequency excitation could be successfully suppressed by this method. The measurement of eigenfrequencies of the prototype runner has been carried out. The results of the measurement are compared with the results of the modal analyses of the runner.
- Dynamic characteristic of the hydraulic and mechanical solution for any Pelton turbine depends on a lot of various effects. The paper presents basic steps of the hydraulic design of the horizontal three nozzles Pelton turbine as well as an analysis of the bucket excitation in dependence on the pitch angle of the nozzles. The numerical modelling of the energy transfer from the jet to the runner was simulated based on application of Euler turbine equation. The evaluation of the numerical flow simulation was applied for the determination of following nozzles pitch angle. The basic condition applied for the solution is that the water, which flows from the previous nozzle, has not any significant contact with the water flowing from the following nozzle. In that way the optimised pitch angle between following buckets has been determined. A static pressure distribution over the turbine bucket by numerical simulation has been carried out. The excitation of the bucket was evaluated by a numerical integration of the static pressure at the bucket. It is evident that for different nozzles pitch angles there appear the same signals in the same time in different positions at the runner according to different positions of individual nozzles. In that way a phase angle appears between these signals, and the bucket excitation is affected by the phase angle. The phase angle could be modified by nozzles pitch angle modifications and high frequency excitation could be successfully suppressed by this method. The measurement of eigenfrequencies of the prototype runner has been carried out. The results of the measurement are compared with the results of the modal analyses of the runner. (en)
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| Title
| - Excitation of the runner in horizontal three nozzles Pelton turbine
- Excitation of the runner in horizontal three nozzles Pelton turbine (en)
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| skos:prefLabel
| - Excitation of the runner in horizontal three nozzles Pelton turbine
- Excitation of the runner in horizontal three nozzles Pelton turbine (en)
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| skos:notation
| - RIV/25305034:_____/13:#0000030!RIV14-MPO-25305034
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/25305034:_____/13:#0000030
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - Pelton Turbine; Numerical Simulation; Bucket; Runner; Excitation (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...iv/tvurceVysledku
| - Habán, Vladimír
- Hudec, Martin
- Jízdný, Martin
- Veselý, Jindřich
- Mikulášek, Josef
- Čepa, Zdeněk
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