Abstract
In case of predicting the performance of prototype Pelton turbine from a model test, a scale effect has been ignored so far. However, it is getting clear that there is an outstanding deviation from a classical similarity laws. The direction of the deviation is completely inverse against the case of reaction turbines, namely, the performance of prototype is worse than the predicted one. In order to analyze this negative scale effect, the behavior of jets should be considered more precisely. In this study, the unsteady jet issuing from a Pelton turbine nozzle was calculated numerically using HSMAC method under the assumption of axisymmetric flow. The calculation shows that the needle considerably affects the velocity distribution in the jet and the velocity distribution in the jet changes by the head.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Bachmann, P., Scharer, Ch., Staubli, T. and Vullioud, G. (1990) Experimental Flow Studies on a 1-jet Model Pelton Turbine, Proc. 15th JAHR Symp. 2, Paper R. 3.
Grein, H., Meier, J. and Klicov, D. (1986) Efficiency Scale Effects in Pelton Turbines, Proc. 13th IAHR Symp. 2, Paper 76.
Guilbaud, M., Houdeline, J. B. and Philibert, R. (1992) Study of the Flow in the Various Sections of a Pelton Turbine, Proc. 16th JAHR Symp. 2, 819–831
Hirt, C. W. and Cook, J. L. (1972) Calculating Three-dimensional Flows around Structures and over Rough Terrain, J. Computational Physics 10, 324–340.
Hoyt, J. W. and Taylor, J. J. (1977) Waves on Water Jets, J. Fluid Mechanics 83 part 1, 119–127.
Kubota, T., (1989) Observation of Jet Interference in 6-nozzle Pelton Turbine, J. Hydraulic Research 27, 6, 753–767.
Kubota, T. and Nakanishi, Y. (1994) Classification of Flow in Pelton Turbines for Study of Scale Effect, Proc. 17th L4HR Symp. 2, 865–876.
Nonoshita, T. et al. (1993) Behavior of the Jet from a Pelton Turbine Nozzle, Proc. 4th Asian Int. Conf. Fluid Machinery II, 499–503.
Nonoshita, T. et al. (1994) Effect of Water Droplets on the Jet from a Pelton Turbine Nozzle, Proc. 17th IAHR Symp. 1, 165–176.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1996 Springer Science+Business Media Dordrecht
About this paper
Cite this paper
Nonoshita, T., Matsumoto, Y., Kubota, T., Ohashi, H. (1996). Numerical Simulation of Jet in a Pelton Turbine. In: Cabrera, E., Espert, V., MartÃnez, F. (eds) Hydraulic Machinery and Cavitation. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-9385-9_35
Download citation
DOI: https://doi.org/10.1007/978-94-010-9385-9_35
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-9387-3
Online ISBN: 978-94-010-9385-9
eBook Packages: Springer Book Archive