STRESS AND FATIGUE LIFE PREDICTION OF THE H-TYPE DARRIEUS VERTICAL AXIS TURBINE FOR MICRO-HYDROPOWER APPLICATIONS

Authors:

Intizar Ali,Shadi Khan Baloch,Saifullah Samo,Tanweer Hussain,

DOI NO:

https://doi.org/10.26782/jmcms.2021.06.00003

Keywords:

Structural loading,Hydrokinetic turbine,Turbine stress analysis,deflection,fatigue life,Factor of safety,

Abstract

The present study aims to analyze the structural behavior of the Darrieus Hydro-kinetic turbine at different upstream velocity values and rotational rates. For that purpose, one-way fluid-structure interaction is performed to predict stresses, deformation and fatigue life of the turbine. To determine real-time fluid loads three-dimensional fluid flow simulations were performed, the obtained fluid loads were transferred to the structural finite element analysis model. CFD simulation results were validated with experimental results from literature where the close agreement was noticed. Structural analysis results revealed that the highest stresses are produced in the struts and at the joint where the shaft is connected with struts. Moreover, it was also found that the stress produced in the turbine is highly non-linear against Tip Speed Ratio (TSR) i.e inflow water velocity. Finite Element Analysis (FEA) results showed that maximum values of stresses were found in the turbine strut having a value 131.99MPa, which lower than the yield strength of the material, the fatigue life of 117520 cycles and factor of safety 1.89. The study also found that increased inflow velocity results increase in stress and deformation produced in the turbine. Additionally, the study assumed Aluminum Alloy as turbine blade material, further; it was found that the blade which confronts flow, experience higher stresses. Moreover, the study concluded that strut, blade-strut joint and strut-shaft joint are the critical parts of the turbine, require careful design consideration. Furthermore, the study also suggests that the turbine blade may be kept hollow to reduce turbine weight; hence inertia and turbine struts and shaft should be made of steel or the material having higher stiffness and strength.

Refference:

I. Alia, I., et al. (2016). “131. Parametric Study of Three Blade Vertical Axis Micro Hydro Turbines (VAMHT) by changing Blade Characteristics.”

II. Castelli, M. R., et al. (2010). Modeling strategy and numerical validation for a Darrieus vertical axis micro-wind turbine. ASME 2010 international mechanical engineering congress and exposition, Citeseer.

III. Danao, L. A., et al. (2013). The Performance of a Vertical Axis Wind Turbine in Fluctuating Wind-A Numerical Study. Proceedings of the World Congress on Engineering.

IV. Golecha, K., et al. (2011). “Influence of the deflector plate on the performance of modified Savonius water turbine.” Applied Energy 88(9): 3207-3217.

V. Gopinath, D. and C. V. Sushma (2015). “Design and optimization of four wheeler connecting rod using finite element analysis.” Materials Today: Proceedings 2(4-5): 2291-2299.
VI. Ganthia Bibhu Prasad, Subrat Kumar Barik, Byamakesh Nayak, : ‘TRANSIENT ANALYSIS OF GRID INTEGRATED STATOR VOLTAGE ORIENTED CONTROLLED TYPE-III DFIG DRIVEN WIND TURBINE ENERGY SYSTEM’. J. Mech. Cont.& Math. Sci., Vol.-15, No.-6, June (2020) pp 139-157.
VII. Hameed, M. S. and S. K. Afaq (2013). “Design and analysis of a straight bladed vertical axis wind turbine blade using analytical and numerical techniques.” Ocean Engineering 57: 248-255.

VIII. Huang, S.-R., et al. (2014). “Theoretical and conditional monitoring of a small three-bladed vertical-axis micro-hydro turbine.” Energy conversion and management 86: 727-734.

IX. Kamoji, M., et al. (2008). “Experimental investigations on single stage, two stage and three stage conventional Savonius rotor.” International journal of energy research 32(10): 877-895.

X. Kamoji, M., et al. (2009). “Performance tests on helical Savonius rotors.” Renewable Energy 34(3): 521-529.

XI. Kamoji, M., et al. (2009). “Experimental investigations on single stage modified Savonius rotor.” Applied Energy 86(7): 1064-1073.

XII. Khan, M., et al. (2009). “Hydrokinetic energy conversion systems and assessment of horizontal and vertical axis turbines for river and tidal applications: A technology status review.” Applied energy 86(10): 1823-1835.

XIII. Kirke, B. (2011). “Tests on ducted and bare helical and straight blade Darrieus hydrokinetic turbines.” Renewable Energy 36(11): 3013-3022.

XIV. Kumar, A., et al. (2014). “DynamicAnalysis of Bajaj Pulsar 150cc Connecting Rod Using ANSYS 14.0.” Asian Journal of Engineering and Applied Technology ISSN 3(2): 19-24.

XV. Kumar, D. and P. Bhingole (2015). “CFD based analysis of combined effect of cavitation and silt erosion on Kaplan turbine.” Materials Today: Proceedings 2(4-5): 2314-2322.

XVI. Li, Y. and S. M. Calisal (2010). “Three-dimensional effects and arm effects on modeling a vertical axis tidal current turbine.” Renewable energy 35(10): 2325-2334.

XVII. Maître, T., et al. (2013). “Modeling of the flow in a Darrieus water turbine: Wall grid refinement analysis and comparison with experiments.” Renewable energy 51: 497-512.

XVIII. Malipeddi, A. and D. Chatterjee (2012). “Influence of duct geometry on the performance of Darrieus hydroturbine.” Renewable energy 43: 292-300.

XIX. Marsh, P., et al. (2012). Three dimensional numerical simulations of a straight-bladed vertical axis tidal turbine. 18th Australasian fluid mechanics conference.

XX. Marsh, P., et al. (2016). “Numerical simulation of the loading characteristics of straight and helical-bladed vertical axis tidal turbines.” Renewable energy 94: 418-428.

XXI. Marsh, P., et al. (2017). “The influence of turbulence model and two and three-dimensional domain selection on the simulated performance characteristics of vertical axis tidal turbines.” Renewable energy 105: 106-116.

XXII. Marsh, P. J. (2015). The hydrodynamic and structural loading characteristics of straight and helical-bladed vertical axis tidal and current flow turbines, University of Tasmania.

XXIII. Momčilović, D., et al. (2012). “Failure analysis of hydraulic turbine shaft.” Engineering failure analysis 20: 54-66.

XXIV. Nagendrababu Mahapatruni, Velangini Sarat P., Suresh Mallapu, Durga Syamprasad K., : ‘A SCIENTIFIC APPROACH TO CONTROL THE SPEED DEVIATION OF DUAL REGULATED LOW-HEAD HYDRO POWER PLANT CONNECTED TO SINGLE MACHINE INFINITE BUS’. J. Mech. Cont. & Math. Sci., Vol.-15, No.-8, August (2020) pp 136-150. DOI : 10.26782/jmcms.2020.08.00013

XXV. Paraschivoiu, I. and N. V. Dy (2012). A numerical study of darrieus water turbine. The Twenty-second International Offshore and Polar Engineering Conference, International Society of Offshore and Polar Engineers.

XXVI. Patel, V., et al. (2017). “Experimental investigations on Darrieus straight blade turbine for tidal current application and parametric optimization for hydro farm arrangement.” International journal of marine energy 17: 110-135.

XXVII. Saeed, R., et al. (2010). “Modelling of flow-induced stresses in a Francis turbine runner.” Advances in Engineering Software 41(12): 1245-1255.

XXVIII. Sangal, S., et al. (2013). “Review of optimal selection of turbines for hydroelectric projects.” International Journal of Emerging Technology and Advance Engineering 3: 424-430.

XXIX. Sarma, N., et al. (2014). “Experimental and computational evaluation of Savonius hydrokinetic turbine for low velocity condition with comparison to Savonius wind turbine at the same input power.” Energy Conversion and Management 83: 88-98.

XXX. Sick, M., et al. (2009). Recent developments in the dynamic analysis of water turbines, SAGE Publications Sage UK: London, England.

XXXI. Tsai, J.-S. and F. Chen (2014). “The conceptual design of a tidal power plant in Taiwan.” Journal of Marine Science and Engineering 2(2): 506-533.

XXXII. Tunio, I. A., et al. (2020). “Investigation of duct augmented system effect on the overall performance of straight blade Darrieus hydrokinetic turbine.” Renewable Energy 153: 143-154.

XXXIII. Xiao, R., et al. (2008). “Dynamic stresses in a Francis turbine runner based on fluid-structure interaction analysis.” Tsinghua Science & Technology 13(5): 587-592.

View Download