Print Email Facebook Twitter Modeling of periodic non-smooth motion using the harmonic balance method Title Modeling of periodic non-smooth motion using the harmonic balance method Author Vasulkar, Amey (TU Delft Electrical Engineering, Mathematics and Computer Science) Contributor van der Heul, D.R. (mentor) Degree granting institution Delft University of Technology Programme Applied Mathematics | COSSE (Computer Simulations for Science and Engineering) Date 2018-08-31 Abstract The company Deepwater Energy BV, Netherlands developed a unique water turbine called as the Oryon Watermill (OWM). It was the aim of the company to obtain an efficient numerical model for the turbine. A numerical model, which serves as a good starting point, has already been developed by Maniyara [1]. This model suffered from certain limitations and to tackle these it was realizedthat a smaller and simpler problem needs to be solved. The current thesis deals with developing a numerical model for this smaller problem.In this problem, an airfoil is hinged at its leading edge and rotating under the influence of a periodic water flow. Further, the rotation of the airfoil is restricted by a stopper. This restriction leads to a collision between the airfoil and the stopper due to which the motion of the airfoil is changed suddenly. This is a Fluid-Structure Interaction (FSI) problem. To model the structural part i.e. the airfoil motion, a non-smooth dynamical analysis is needed.Then, the entire FSI problem is solved in a faster and efficient way using the harmonic balance method. For this purpose, the non-smooth dynamics of the airfoil have to be solved using the harmonic balance method. In the thesis, a novel approach is developed to solve the non-smooth dynamics problem using the harmonic balance method. Initially, this new approach is implementedand verified in MATLAB on a 1D level. Later, a MATLAB-OpenFOAM coupled solver is developed to compute the solution to the airfoil problem using this newly developed approach. Subject harmonic balance methodnon-smooth dynamicsFluid Structure InteractionOpenFOAMunilateral contacts To reference this document use: http://resolver.tudelft.nl/uuid:68afebe1-b2a9-4a8e-8e44-2d56bc8bb085 Part of collection Student theses Document type master thesis Rights © 2018 Amey Vasulkar Files PDF Masters_thesis_Amey.pdf 3.68 MB Close viewer /islandora/object/uuid:68afebe1-b2a9-4a8e-8e44-2d56bc8bb085/datastream/OBJ/view