CFD analysis of the needle tip angle in Pelton injector on jet quality for the power generation

Keywords: Computational fluids dynamics, volume of fluid method, injector efficiency

Abstract

Fossil fuels are energy sources that supply a large part of the world's energy generation. However, they produce greenhouse gases such as carbon dioxide (CO2), nitrogen oxide (NOx) and particulates that increase global warming. For this reason, other forms of renewable energy such as hydropower have begun to be implemented through turbomachinery such as Pelton turbines, which significantly reduce these emissions since they are highly efficient turbines based on the use of natural resources (water). Pelton turbines are based mainly on three components for their operation, which are the Pelton injector, the bucket and the wheel. The injector is an important component in the energy transformation of Pelton turbines. Although to analyze its behavior, it is possible to use fluid dynamics (CFD) software to predict the trajectory of the flow through a solid or free surface. The objective of this work is to analyze by means of computational fluid dynamics (CFD) the incidence of the length and the needle tip angle of a Pelton turbine injector on the generated power. For this, an ANSYS 2020R2 computational fluid analysis software was used to study how the variation of the injector needle tip angle influences through the volume of fluid (VOF) method, starting from the generation of a commercial model with a tip angle of 60° and two (2) geometries of 55° and 75° respectively. Numerical results show a better performance for the 75° angle of 96 % and lower for the 55° and 60° with 94.1 % and 95.5 % respectively, whereby steeper angles achieve higher performances. In summary, the present study pretends to increase the power generation, in the face of phenomena occurred in the energy transfer. Although the performance of the injector in each angle configuration must be tested in practice

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Author Biographies

Daniel G. Taborda, Metropolitan Technological Institute

Department of Mechatronics Engineering

Jorge Sierra-Del Rio, Metropolitan Technological Institute

Department of Mechatronics Engineering

Juan Diego Perez-Alvarez, Metropolitan Technological Institute

Department of Mechatronics Engineering

Arley Cardona-Vargas, Metropolitan Technological Institute

Department of Mechatronics Engineering

Daniel Sanin Villa, Pontifical Bolivarian University

Department of Mechanic Engineering

References

Statistical Review of World Energy, 2020 | 69th Edition. Available at: https://www.bp.com/content/dam/bp/business-sites/en/global/corporate/pdfs/energy-economics/statistical-review/bp-stats-review-2020-full-report.pdf

Pelton, L. A. (1980). Pat. No. US233692A. Water Wheel. No. 233,692. Available at: https://patentimages.storage.googleapis.com/6a/19/4e/26608eb3abf576/US233692.pdf

Nechleba, M. (1957). Hydraulic Turbines: Their design and equipment. Prague.

Yin, Z., Shi, B., Zhang, T., Ma, J. (2009). The VOF Method Based on Refined Grids Partition of Partial Domain. Advances in Water Resources and Hydraulic Engineering, 1823–1828. doi: https://doi.org/10.1007/978-3-540-89465-0_314

Koukouvinis, P. K., Anagnostopoulos, J. S., Papantonis, D. E., Simos, T. E., Psihoyios, G., Tsitouras, C. (2009). Turbulence Modeling in Smoothed Particle Hydrodynamics Methodology: Application in Nozzle Flow. AIP Conference Proceedings. doi: https://doi.org/10.1063/1.3241439

Zhang, Z., Parkinson, E. (2002). LDA application and the dual-measurement-method in experimental investigations of the free surface jet at a model nozzle of a Pelton turbine. Conference: 11th. International Symposium on Applications of Laser Anemometry to Fluid Mechanics.

Zhang, Z., Casey, M. (2007). Experimental studies of the jet of a Pelton turbine. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 221 (8), 1181–1192. doi: https://doi.org/10.1243/09576509jpe408

List, B., Prost, J., Matthias, H. (2000). Using Piv on the Splash Water in a Pelton Turbine. XVI IMEKO World Congress. Vienna, 1–5.

Zeng, C., Xiao, Y., Luo, Y., Zhang, J., Wang, Z., Fan, H., Ahn, S.-H. (2018). Hydraulic performance prediction of a prototype four-nozzle Pelton turbine by entire flow path simulation. Renewable Energy, 125, 270–282. doi: https://doi.org/10.1016/j.renene.2018.02.075

Chongji, Z., Yexiang, X., Wei, X., Tao, W., Jin, Z., Zhengwei, W., Yongyao, L. (2016). Numerical Analysis of Pelton Nozzle Jet Flow Behavior Considering Elbow Pipe. IOP Conference Series: Earth and Environmental Science, 49, 022005. doi: https://doi.org/10.1088/1755-1315/49/2/022005

Fiereder, R., Riemann, S., Schilling, R. (2010). Numerical and experimental investigation of the 3D free surface flow in a model Pelton turbine. IOP Conference Series: Earth and Environmental Science, 12, 012072. doi: https://doi.org/10.1088/1755-1315/12/1/012072

Peron, M., Parkinson, E., Geppert, L., Staubli, T. (2008). Importance of jet quality on Pelton efficiency and cavitation. Int. Conf. on Hydraulic Efficiency Measurements, 1–9.

Staubli, T. et. al. (2009). Jet quality and Pelton efficiency. Conference: Hydro 2009. Lyon.

Staubli, T., Hauser, H. P. (2004). Flow visualization - a diagnosis tool for pelton turbines. IGHEM2004. Lucerne, 1–9.

Benzon, D. S. (2016). The Turgo impulse turbine; a CFD based approach to the design improvement with experimental validation. Lancaster. Available at: https://eprints.lancs.ac.uk/id/eprint/82918/1/2016benzonphd.pdf

Benzon, D., Židonis, A., Panagiotopoulos, A., Aggidis, G. A., Anagnostopoulos, J. S., Papantonis, D. E. (2015). Impulse Turbine Injector Design Improvement Using Computational Fluid Dynamics. Journal of Fluids Engineering, 137 (4). doi: https://doi.org/10.1115/1.4029310

Petley, S., Panagiotopoulos, A., Benzon, D. S., Židonis, A., Aggidis, G. A., Anagnostopoulos, J. S., Papantonis, D. E. (2019). Investigating the influence of the jet from three nozzle and spear design configurations on Pelton runner performance by numerical simulation. IOP Conference Series: Earth and Environmental Science, 240, 022004. doi: https://doi.org/10.1088/1755-1315/240/2/022004

Thaung, Z. C. (2018). Experimental and Numerical Computational Fluid Dynamics Analysis on the Flow at Pelton Turbine Nozzle with Various Opening Settings. International Journal of Science and Engineering Applications, 7 (08), 169–174. Available at: https://ijsea.com/archive/volume7/issue8/IJSEA07081008.pdf

Nesiadis, A. V., Papantonis, D. E., Anagnostopoulos, J. S. (2011). Numerical Study of the Effect of Spear Valve Design on the Free Jet Flow Characteristics in Impulse Hydroturbines. 7th GRACM International Congress on Computational Mechanics. Athens. Available at: https://www.researchgate.net/publication/281096055_NUMERICAL_STUDY_OF_THE_EFFECT_OF_SPEAR_VALVE_DESIGN_ON_THE_FREE_JET_FLOW_CHARACTERISTICS_IN_IMPULSE_HYDROTURBINES

Nesiadis, A. V., Anagnostopoulos, J. S., Papantonis, D. E. (2013). Study of the injector design in impulse hydro turbines. AIP Conference Proceedings. doi: https://doi.org/10.1063/1.4825999

Jošt, D., Mežnar, P., Lipej, A. (2010). Numerical prediction of Pelton turbine efficiency. IOP Conference Series: Earth and Environmental Science, 12, 012080. doi: https://doi.org/10.1088/1755-1315/12/1/012080

Zhang, J., Xiao, Y. X., Wang, J. Q., Zhou, X. J., Xia, M., Zeng, C. J. et. al. (2018). Optimal design of a pelton turbine nozzle via 3D numerical simulation. IOP Conference Series: Earth and Environmental Science, 163, 012066. doi: https://doi.org/10.1088/1755-1315/163/1/012066

Alnakhlani, M. M., Mukhtar, M., Himawanto, D. A., Alkurtehi, A., Danardono, D. (2014). Effect of the Bucket and Nozzle Dimension on the Performance of a Pelton Water Turbine. Modern Applied Science, 9 (1). doi: https://doi.org/10.5539/mas.v9n1p25

Gass, M. (2002). Modification Of Nozzles For The Improvement Of Efficiency Of Pelton Type Turbines. HydroVision 2002, 1–7. Available at: http://hydromg.com/articles/mod%20nozzle%202002.pdf

Unterberger, P., Bauer, C., Gaschl, J., Mack, R. (2010). Studies on the free jet of pelton nozzles. Conference: Reliable hydropower for a safe and sustainable power production. Available at: https://www.researchgate.net/publication/260508415_Studies_on_the_free_jet_of_pelton_nozzles

Theint, K., Myo, L. (2018). Design of Speed Control System for Pelton Turbine. International Journal of Scientific and Research Publications (IJSRP), 8 (7). doi: https://doi.org/10.29322/ijsrp.8.7.2018.p7950

Pointwise. Y+ calculate. Available at: https://www.pointwise.com/yplus/index.html

ANSYS ICEM CFD Tutorial Manual. Available at: https://engineering.purdue.edu/~scalo/menu/teaching/me608/tutorial.pdf

Chongji, Z., Yexiang, X., Wei, Z., Yangyang, Y., Lei, C., Zhengwei, W. (2014). Pelton turbine Needle erosion prediction based on 3D three- phase flow simulation. IOP Conference Series: Earth and Environmental Science, 22 (5), 052019. doi: https://doi.org/10.1088/1755-1315/22/5/052019

Shih, T.-H., Liou, W. W., Shabbir, A., Yang, Z., Zhu, J. (1995). A new k-ϵ eddy viscosity model for high reynolds number turbulent flows. Computers & Fluids, 24 (3), 227–238. doi: https://doi.org/10.1016/0045-7930(94)00032-t

Bajracharya, T. R., Shrestha, R., Timilsina, A. B. (2019). A Methodology for Modelling of Steady State Flow in Pelton Turbine Injectors. Journal of the Institute of Engineering, 15 (2), 246–255. doi: https://doi.org/10.3126/jie.v15i2.27674

Jung, I. H., Kim, Y. S., Shin, D. H., Chung, J. T., Shin, Y. (2019). Influence of spear needle eccentricity on jet quality in micro Pelton turbine for power generation. Energy, 175, 58–65. doi: https://doi.org/10.1016/j.energy.2019.03.077

Staubli, T., Abgottspon, A., Weibel, P., Bissel, C., Parkinson, E., Leduc, J. (2009). Die Auswirkung der Strahlqualität auf den Wirkungsgrad von Peltonturbinen. Wasser Energ. Luft, 101 (3), 181–188.

Petley, S., Židonis, A., Panagiotopoulos, A., Benzon, D., Aggidis, G. A., Anagnostopoulos, J. S., Papantonis, D. E. (2019). Out With the Old, in With the New: Pelton Hydro Turbine Performance Influence Utilizing Three Different Injector Geometries. Journal of Fluids Engineering, 141 (8). doi: https://doi.org/10.1115/1.4042371


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Published
2021-05-27
How to Cite
Taborda, D. G., Rio, J. S.-D., Perez-Alvarez, J. D., Cardona-Vargas, A., & Villa, D. S. (2021). CFD analysis of the needle tip angle in Pelton injector on jet quality for the power generation. EUREKA: Physics and Engineering, (3), 45-59. https://doi.org/10.21303/2461-4262.2021.001828
Section
Engineering