Reliability Analysis for Hydrokinetic Turbine BladesRenewable Energy
AbstractReliability is an important element in the performance of hydrokinetic turbines. It is also a driving factor of the system lifetime cost. In this paper, we perform time-dependent reliability analysis for the blades of a river-based horizontal-axis hydrokinetic turbine. Based on the stochastic representation of the monthly river velocity and material strength, a limit-state function is established with the classical blade element momentum method. In the limit-state function, a failure is defined as the event when the flapwise bending moment exceeds the allowable moment that corresponds to the ultimate strength of the material. The upcrossing rate method is employed to calculate the time-dependent reliability of the hydrokinetic turbine blade over its design life period. The results indicate that setting a proper cut-out river velocity is important for the reliability of the hydrokinetic turbine blade.
Department(s)Mechanical and Aerospace Engineering
Document TypeArticle - Journal
Rights© 2012 Elsevier, All rights reserved.
Citation InformationZhen Hu and Xiaoping Du. "Reliability Analysis for Hydrokinetic Turbine Blades" Renewable Energy (2012)
Available at: http://works.bepress.com/xiaoping-du/55/