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Strength structure optimization of aerodynamic wind turbines blades

Author: Guțu Marin
Degree:doctor of engineering
Speciality: 05.02.02 - Theory of machines and machine elements
Scientific adviser: Viorel Bostan
doctor habilitat, professor, Technical University of Moldova
Scientific consultant: Valeriu Dulgheru
doctor habilitat, professor, Technical University of Moldova
Institution: Technical University of Moldova


The thesis was presented on the 7 April, 2017
Approved by NCAA on the 31 May, 2017


Adobe PDF document2.45 Mb / in romanian


CZU 620.9(043.2)

Adobe PDF document 13.88 Mb / in romanian
159 pages


aerodynamic blade; wind energy conversion; strength structure; composite materials; test specimens; CFD simulation; FSI simulation


The thesis includes an introduction, four chapters, conclusions and recommendations, references with 121 titles and 4 annexes. The volume is 140 pages, including 99 figures and 20 tables. The main content of the thesis has been published in 16 scientific papers, including 8 single author papers, 6 papers in peer-reviewed journals and 3 patents.

The field of study refers to strength structure of aerodynamic wind turbines blades made from composite materials.

The purpose of this paper is theoretical and experimental argumentation of strength structure of the aerodynamic blade for small wind turbines (P <20 kW) for increasing the efficiency of energy conversion.

Scientific novelty and value of the work. Elaboration of strength structure of blade from composite materials for small wind turbines and argumentation it from point of view of constructive simplicity and low weight obtained as a result of optimization of the architecture of layered composite material.

Theoretical significance consists in the development of research methodology of the wind turbine rotor aerodynamics and of the strength structure of the blades from layered composite materials.

Scientific research methodology is to create a platform based on numerical and experimental models and methods of research which allows determination of the mechanical characteristics of composite materials, elaboration of aerodynamic blade design from composite materials, simulation of the rotor aerodynamics and interaction of fluid with blade structure.

Implementation of research results. There were developed two laboratory works for the process of master studies for the specialty ISCER. Also, the recommendations of composite material architecture and the blades manufacturing technology were defined, which in the future, will allow serial production of aerodynamic blades for small wind turbines.