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Out with the old, in with the new: Pelton hydro turbine performance influence utilising three different injector geometries

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Out with the old, in with the new: Pelton hydro turbine performance influence utilising three different injector geometries. / Petley, Sean; Zidonis, Audrius; Panagiotopoulos, Alexandros et al.
In: Journal of Fluids Engineering, Vol. 141, No. 8, 081103, 30.01.2019.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Petley, S, Zidonis, A, Panagiotopoulos, A, Benzon, S, Aggidis, GA, Anagnostopoulos, I & Papantonis, D 2019, 'Out with the old, in with the new: Pelton hydro turbine performance influence utilising three different injector geometries', Journal of Fluids Engineering, vol. 141, no. 8, 081103. https://doi.org/10.1115/1.4042371

APA

Petley, S., Zidonis, A., Panagiotopoulos, A., Benzon, S., Aggidis, G. A., Anagnostopoulos, I., & Papantonis, D. (2019). Out with the old, in with the new: Pelton hydro turbine performance influence utilising three different injector geometries. Journal of Fluids Engineering, 141(8), Article 081103. https://doi.org/10.1115/1.4042371

Vancouver

Petley S, Zidonis A, Panagiotopoulos A, Benzon S, Aggidis GA, Anagnostopoulos I et al. Out with the old, in with the new: Pelton hydro turbine performance influence utilising three different injector geometries. Journal of Fluids Engineering. 2019 Jan 30;141(8):081103. Epub 2018 Dec 22. doi: 10.1115/1.4042371

Author

Petley, Sean ; Zidonis, Audrius ; Panagiotopoulos, Alexandros et al. / Out with the old, in with the new : Pelton hydro turbine performance influence utilising three different injector geometries. In: Journal of Fluids Engineering. 2019 ; Vol. 141, No. 8.

Bibtex

@article{ac58323c225949e7a1be0f0e00e6ff26,
title = "Out with the old, in with the new: Pelton hydro turbine performance influence utilising three different injector geometries",
abstract = "In previous works the authors presented CFD results, which showed that injectors with noticeably steeper nozzle and spear angles 110° & 70° and 150° & 90° respectively, attain higher efficiency than the industry standard 80° & 55°. Moreover, experimental testing of the entire Pelton system showed that gains of about 1% in efficiency can be achieved, however there appears to be an upper limit beyond which steeper designs are no longer optimal. This study aims at providing further insight by presenting additional CFD analysis of the runner, which has been coupled with the jet profile from the aforementioned injectors. The results are compared by examining the impact the jet shape has on the runner torque profile during the bucket cycle and the influence this has on turbine efficiency. It can be concluded that the secondary velocities, which contribute to the development of more significant free-surface degradations as the spear and nozzle angles are increased result in a non-optimal jet runner interaction.",
keywords = "Ejectors, Hydraulic turbines, Nozzles, Computational fluid dynamics, Testing, Turbines, Cycles, Shapes, Torque, Engineering standards",
author = "Sean Petley and Audrius Zidonis and Alexandros Panagiotopoulos and Shaun Benzon and Aggidis, {George Athanasios} and Ioannis Anagnostopoulos and Dimitris Papantonis",
note = "Copyright (c) 2018 by ASME",
year = "2019",
month = jan,
day = "30",
doi = "10.1115/1.4042371",
language = "English",
volume = "141",
journal = "Journal of Fluids Engineering",
issn = "0098-2202",
publisher = "American Society of Mechanical Engineers(ASME)",
number = "8",

}

RIS

TY - JOUR

T1 - Out with the old, in with the new

T2 - Pelton hydro turbine performance influence utilising three different injector geometries

AU - Petley, Sean

AU - Zidonis, Audrius

AU - Panagiotopoulos, Alexandros

AU - Benzon, Shaun

AU - Aggidis, George Athanasios

AU - Anagnostopoulos, Ioannis

AU - Papantonis, Dimitris

N1 - Copyright (c) 2018 by ASME

PY - 2019/1/30

Y1 - 2019/1/30

N2 - In previous works the authors presented CFD results, which showed that injectors with noticeably steeper nozzle and spear angles 110° & 70° and 150° & 90° respectively, attain higher efficiency than the industry standard 80° & 55°. Moreover, experimental testing of the entire Pelton system showed that gains of about 1% in efficiency can be achieved, however there appears to be an upper limit beyond which steeper designs are no longer optimal. This study aims at providing further insight by presenting additional CFD analysis of the runner, which has been coupled with the jet profile from the aforementioned injectors. The results are compared by examining the impact the jet shape has on the runner torque profile during the bucket cycle and the influence this has on turbine efficiency. It can be concluded that the secondary velocities, which contribute to the development of more significant free-surface degradations as the spear and nozzle angles are increased result in a non-optimal jet runner interaction.

AB - In previous works the authors presented CFD results, which showed that injectors with noticeably steeper nozzle and spear angles 110° & 70° and 150° & 90° respectively, attain higher efficiency than the industry standard 80° & 55°. Moreover, experimental testing of the entire Pelton system showed that gains of about 1% in efficiency can be achieved, however there appears to be an upper limit beyond which steeper designs are no longer optimal. This study aims at providing further insight by presenting additional CFD analysis of the runner, which has been coupled with the jet profile from the aforementioned injectors. The results are compared by examining the impact the jet shape has on the runner torque profile during the bucket cycle and the influence this has on turbine efficiency. It can be concluded that the secondary velocities, which contribute to the development of more significant free-surface degradations as the spear and nozzle angles are increased result in a non-optimal jet runner interaction.

KW - Ejectors

KW - Hydraulic turbines

KW - Nozzles

KW - Computational fluid dynamics

KW - Testing

KW - Turbines

KW - Cycles

KW - Shapes

KW - Torque

KW - Engineering standards

U2 - 10.1115/1.4042371

DO - 10.1115/1.4042371

M3 - Journal article

VL - 141

JO - Journal of Fluids Engineering

JF - Journal of Fluids Engineering

SN - 0098-2202

IS - 8

M1 - 081103

ER -