De-icing and anti-icing systems of commercial aircrafts are of particular importance for safety in flight through atmospheric icing conditions. Due to new technologies in aircraft electrical systems and lightweight materials electro-thermal concepts are used increasingly. An alternative, energy-efficient method is represented by an electro-mechanical system that removes the ice layer by an impulse loading of the structure. The main objective of this thesis is the simulation of the electro-impulse de-icing process with a coupled magnetic and structural model based on the finite element method. This allows the determination of optimal configurations for different load cases without time and cost expensive real structure tests. In addition to these simulations experimental studies on plates of aluminum and carbon fiber reinforced plastics are carried out to validate the numerical results. Furthermore the de-icing phenomenology of iced aluminum plates, characterized by different ice layer thicknesses and impulse forces respectively, is determined in an extensive series of tests. The de-icing calculations of this work are based on a stress criterion, which is determined experimentally for the used combination of aluminum and glaze ice. The de-icing is calculated during the simulation of the structural deformation which affects the dynamic behavior in further simulation steps. A strength and fatigue analysis of the structure is also determined using the validated model. For the assessment of the potential of an electro-mechanical de-icing system the concept is investigated by a simplified aircraft's leading edge. The influence of the load position on de-icing quantity is analyzed as well as the strength-related stress of the structure. The aim is the determination of an optimal configuration which causes in maximum ice removal with low energy consumption and tolerable structural loading.
Simulation und experimentelle Untersuchung eines elektromechanischen Enteisungssystems
2014
162 Seiten, Bilder, Tabellen, 75 Quellen
Theses
German
Simulation und experimentelle Untersuchung eines elektromechanischen Enteisungssystems
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