Abstract
The basic formula for determining the of a Pelton turbine is Eq. (2.40). This equation has been taken over directly from the equation of frictionless flow in a linearly translating bucket. It only takes into consideration the exit swirling loss. Since the efficiency is calculated there for a constant peripheral speed coefficient (k m) and in effect each water particle has its individual form in the interaction with the bucket, the calculation for a constant peripheral speed coefficient is only an approximation. Its comparison with the computational results from the so-called jet layer method (Sect. 6.2.2) showed a small difference of only about 0.2 % (Fig. 9.5).
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Reference
Zhang, Zh. (2007). Flow interactions in Pelton turbines and the hydraulic efficiency of the turbine system. Proceedings of the IMechE Vol. 221, Part A: Journal of Power and Energy, pp. 343–357.
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© 2016 Springer International Publishing Switzerland
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Zhang, Z. (2016). Hydraulic and Mechanical Efficiency. In: Pelton Turbines. Springer, Cham. https://doi.org/10.1007/978-3-319-31909-4_15
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DOI: https://doi.org/10.1007/978-3-319-31909-4_15
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