Numerical aided design of Pelton nozzle jet deflector

• Autorzy: Popovski Boro , Lipej Andrej

Identyfikatory

DOI

10.30464/10.30464/jmee.2021.5.2.149

• Języki publikacji: EN

Abstrakty

EN

Hydro energy still occupies an important place among renewable energy sources. In special operating conditions, Pelton turbines are irreplaceable and can be used for extremely small hydropower plants and also large hydro power plants. Pelton turbines can operate with high head and relatively small flow rates. In many cases, the height differences of the water are very large. Sometimes it is necessary to stop the operation of the turbine very quickly and the consequences of water hammer can be very severe. The responsible part to minimize the consequences of this phenomena is jet deflector, which can be in two different technical designs. The steps for 3-D geometry definition, pre-processing and post-processing, flow modelling and FEM analysis are presented. In the paper is presented the new optimized design of push-out jet deflector shape. Optimization consider 3-D CFD analysis of free surface flow and stress analysis. The main goal of the research was to minimize the influence of all force components on the torque of deflector servomotor. The final results present the geometry of the deflector, with a significant reduction in the stresses and deformations. These have been achieved with a crucial reduction in the hydrodynamic force and torque.

Słowa kluczowe

EN

water turbine; Pelton turbine; jet deflector; free surface flow; numerical analysis

PL

turbina wodna; turbina Peltona; deflektor; przepływ ze swobodną powierzchnią; analiza numeryczna

• Wydawca: Wydawnictwo Uczelniane Politechniki Koszalińskiej
• Czasopismo: Journal of Mechanical and Energy Engineering
• Rocznik: 2021
• Tom: Vol. 5, No 2
• Strony: 149--156
• Opis fizyczny: Bibliogr. 14 poz., rys., tab., wykr.

Twórcy

autor

Popovski Boro

• Turbine design & consulting S.P., Slovenia

autor

Lipej Andrej

• Faculty of Mechanical Engineering, University of Novo Mesto, Na Loko 2, 8000 Novo mesto, Slovenia

Bibliografia

• 1. Li Ji-Qing, May Myat, Moe Saw, 2017, Fatigue Analysis of Simple and Advanced Hoop Pelton Turbine Buckets, American Scientific Research Journal for Engineering, Technology, and Sciences, Volume 29, No 1, pp 371-378.
• 2. Zhang Z., Muggli F., Parkinson E., Schärer C., 2000, Experimental investigation of a low head jet flow at a model nozzle of a Pelton turbine, International Seminar Wasserkraftanlagen, Wien.
• 3. Patel K., Patel B., Yadav M., and Foggia T., 2010, Development of Pelton turbine using numerical simulation, 25th IAHR Symposium on Hydraulic Machinery and Systems, 2010. doi:10.1088/1755-1315/12/1/012048
• 4. Zhang Z., Parkinson E., LDA application and the dual-measurement-method in experimental investigations of the free surface jet at a model nozzle of a Pelton turbine, 20th IAHR Symposium, Charlotte, North Carolina, USA
• 5. Mack R. and Moser W., 2002, Numerical Investigation of the Flow in a Pelton Turbine, Proc. of the XXI IAHR Symp. on Hydr. Machin. and Syst. (Lausanne, Switzerland).
• 6. Kvicinsky S., Kueny J.L., Avellan F., Parkinson E., 2002, Experimental and numerical analysis of free surface flows in a rotating bucket, Proceedings of the 21st IAHR Symposium, Lausanne, Switzerland.
• 7. Parkinson E., Neury C., Garcin H., Vullioud G. and Weiss T., 2005, Unsteady Analysis of a Pelton Runner with Flow and Mechanical Simulations, Hydro 2005, (Beljak, Austria).
• 8. Perrig A., Avellan F., Kueny J.L., Fahrat M., Parkinson E., 2006, Flow in a Pelton turbine bucket: numerical and experimental investigations, J. Fluids Eng.128. DOI: 10.1115/1.2170120
• 9. Petley S. M, 2018, Numerical and Experimental Investigation of Flow in Horizontal Axis Pelton Turbines, Dissertation, Lancaster University, Engineering Department in collaboration with Gilbert Gilkes & Gordon Ltd.
• 10. Bisen D., Shukla S., Sharma P.K., 2014, Optimization and Simulation of Hydro-Turbine Nozzle in Based on Ansys Analysis, International Journal of Advance Engineering and Research Development.
• 11. Barale D., Limbardi G., Arakerimath R. R., 2016, Modelling and Parametric Fluid Flow Analysis (CFD) and Effect on Convergent Nozzle Used in Pelton Turbine, Journal of Emerging Technologies and Innovative Research (JETIR).
• 12. Ansys CFX-Solver Theory Guide, 2015.
• 13. Jošt D., Meznar P. and Lipej A., 2010, Numerical prediction of Pelton turbine efficiency, 25th IAHR Symposium on Hydraulic Machinery and Systems. doi:10.1088/1755-1315/12/1/012080
• 14. Popovski B., 2017, Prediction of the geometry for jet deflector of Pelton turbine in respect of optimal design parameters, PhD Thesis (University Ss Cyril and Methodius, Faculty of Mechanical Engineering, Skopje, R. Macedonia).

Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).