Numerical Investigation on the Effect of Guide Vane Configurations and Inclination Angles on the Performance of Gravitational Vortex Water Turbines

Erna Septyaningrum, Ridho Hantoro, Kintania Sisca Rivana

Abstract


Gravitational Vortex Water Turbines (GVWTs) represent an emerging solution for low-head micro-hydropower applications, offering environmentally friendly energy conversion with minimal ecological disruption. This study investigates the effects of guide vane (GV) configurations and inclination angles on the hydrodynamic performance of GVWTs using Computational Fluid Dynamics (CFD) simulations. Various guide vane configurations—6, 7, and 9 vanes—were analyzed under inclination angles of 15°, 30°, and 45°, and evaluated across rotational speeds of 200, 300, and 400 RPM. The results reveal that both the number of vanes and their inclination angles significantly influence torque generation, tangential velocity distribution, recirculation patterns, and overall turbine efficiency. Higher inclination angles increase tangential velocity, enhancing torque, while excessive vane quantity induces flow blockage, increasing hydraulic losses. The optimal performance was achieved with 6 vanes GV at a 45° inclination, generating a maximum torque of 0.1305 Nm and achieving an efficiency of 60% at 400 RPM. Flow visualization confirmed improved streamline alignment and reduced recirculation for this configuration. These findings provide valuable insights into guide vane optimization for enhancing GVWT performance, supporting the development of efficient micro-hydropower systems for sustainable decentralized energy generation.

Keywords


Gravitational Vortex Water Turbine; Guide Vane; Inclination Angle; efficiency

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References


C. Power, A. McNabola, and P. Coughlan, “A Parametric Experimental Investigation of the Operating Conditions of Gravitational Vortex Hydropower (GVHP),” Journal of Clean Energy Technologies, vol. 4, no. 2, pp. 112–119, 2015, doi: 10.7763/jocet.2016.v4.263.

S. Wanchat and R. Suntivarakorn, “Preliminary design of a vortex pool for electrical generation,” Adv Sci Lett, vol. 13, pp. 173–177, Jun. 2012, doi: 10.1166/asl.2012.3855.

Y. Nishi and T. Inagaki, “Performance and Flow Field of a Gravitation Vortex Type Water Turbine,” International Journal of Rotating Machinery, vol. 2017, 2017, doi: 10.1155/2017/2610508.

E. Dick, Fundamental of Turbomachines, 1st ed., no. 2015. New York: Springer, 2015.

P. Halder and A. Samad, “Effect of Guide Vane Angle on Wells Turbine Performance,” ASME 2014 Gas Turbine India Conference, GTINDIA 2014, Feb. 2015, doi: 10.1115/GTINDIA2014-8183.

B. N. Tran, B.-G. Kim, and J.-H. Kim, “The effect of the guide vane number and inclined angle on the performance improvement of a low head propeller turbine,” Journal of Advanced Marine Engineering and Technology, vol. 45, no. 4, pp. 205–212, 2021, doi: 10.5916/jamet.2021.45.4.205.

T. R. Bajracharya et al., “Effects of Geometrical Parameters in Gravitational Water Vortex Turbines with Conical Basin,” Journal of Renewable Energy, vol. 2020, no. Figure 1, pp. 1–16, 2020, doi: 10.1155/2020/5373784.

S. Dhakal, S. Nakarmi, P. Pun, A. B. Thapa, and T. R. Bajracharya, “Development and Testing of Runner and Conical Basin for Gravitational Water Vortex Power Plant,” Journal of the Institute of Engineering, vol. 10, no. 1, pp. 140–148, Aug. 2014, doi: 10.3126/jie.v10i1.10895.

E. Septyaningrum, R. Hantoro, Sarwono, and E. Carolina, “Parameters Analysis of Vortex Formation on Conical Basin of Gravitational Water Vortex Power Plant (GWVPP),” Lecture Notes in Electrical Engineering, vol. 876, pp. 69–78, 2022, doi: 10.1007/978-981-19-1581-9_8/COVER.

Y. Nishi, R. Suzuo, D. Sukemori, and T. Inagaki, “Loss analysis of gravitation vortex type water turbine and influence of flow rate on the turbine’s performance,” Renew Energy, vol. 155, pp. 1103–1117, 2020, doi: 10.1016/j.renene.2020.03.186.

D. Powalla, S. Hoerner, O. Cleynen, N. Müller, J. Stamm, and D. Thévenin, “A computational fluid dynamics model for a water vortex power plant as platform for etho-and ecohydraulic research,” Energies (Basel), vol. 14, no. 3, pp. 1–14, 2021, doi: 10.3390/en14030639.

A. B. Janjua, M. S. Khalil, M. Saeed, F. S. Butt, and A. W. Badar, “Static and dynamic computational analysis of Kaplan turbine runner by varying blade profile,” Energy for Sustainable Development, vol. 58, pp. 90–99, 2020, doi: 10.1016/j.esd.2020.07.008.

S. Dhakal et al., “Comparison of cylindrical and conical basins with optimum position of runner: Gravitational water vortex power plant,” Aug. 01, 2015, Elsevier Ltd. doi: 10.1016/j.rser.2015.04.030.

S. Mulligan, J. Casserly, and R. Sherlock, “Experimental and Numerical Modelling of Free-Surface Turbulent Flows in Full Air-Core Water Vortices,” in Advances in Hydroinformatics, P. Gourbesville, Ed., Singapore: Springer, 2016, pp. 549–569. doi: 10.1007/978-981-287-615-7_37.

P. Singh and F. Nestmann, “Experimental optimization of a free vortex propeller runner for micro hydro application,” Exp Therm Fluid Sci, vol. 33, no. 6, pp. 991–1002, 2009, doi: 10.1016/j.expthermflusci.2009.04.007.

A. Gautam, A. Sapkota, S. Neupane, J. Dhakal, A. B. Timilsina, and S. Shakya, “Study on Effect of Adding Booster Runner in Conical Basin : Gravitational Water Vortex Power Plant : A Numerical and Experimental Approach,” 2017.

J. A. Chattha, T. A. Cheema, and N. H. Khan, “Numerical investigation of basin geometries for vortex generation in a gravitational water vortex power plant,” in 2017 8th International Renewable Energy Congress, IREC 2017, Institute of Electrical and Electronics Engineers Inc., May 2017. doi: 10.1109/IREC.2017.7926028.

F. M. Tamiri, E. C. T. Yeo, and M. A. Ismail, “Vortex profile analysis under different diffuser size for inlet channel of gravitational water vortex power plant,” IOP Conf Ser Mater Sci Eng, vol. 1217, no. 1, p. 012014, 2022, doi: 10.1088/1757-899x/1217/1/012014.

L. Velásquez García, A. Rubio-Clemente, and E. Chica, “Numerical analysis of the inlet channel and basin geometries for vortex generation in a gravitational water vortex power plant,” Renewable Energy and Power Quality Journal, vol. 18, no. 18, pp. 161–166, 2020, doi: 10.24084/repqj18.259.

N.-H. Park and Y.-W. Rhee, “Output Optimization of Microhydro Kaplan Turbine by Double Regulating Runner and Guide Vane,” Journal of Fluid Machinery, vol. 16, no. 1, pp. 17–23, 2013, doi: 10.5293/kfma.2013.16.1.017.

S. Mulligan and P. Hull, “Design and Optimisation of a Water Vortex Hydropower Plant,” Materials Science and Engineering A, vol. 6, p. 62330, 2010.

B. Pereiras, M. Takao, F. Garcia, and F. Castro, “Influence of the Guide Vanes Solidity on the Performance of a Radial Impulse Turbine With Pitch-Controlled Guide Vanes,” Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE, vol. 5, pp. 829–836, Oct. 2011, doi: 10.1115/OMAE2011-50105




DOI: https://doi.org/10.31284/j.iptek.2025.v29i2.8050

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