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The influence of the blades leading edge anti-erosion protection on main rotor performances

Wojtas M., Czajkowski Ł., Sobieszek A.

Journal of KONES

2018

Vol. 25, No. 2

409--414

This article presents the influence of rotor blade airfoil shape on main rotor performances. In this case, we analysed the influence of anti-erosion tape, which is applied to the leading edge of the blade to protect the blades from environmental conditions. In Gyro-Tech Innovation an Aviation Company and Institute of Aviation the independent tests of helicopter and gyroplane main rotors were performed. Research includes: bench tests, on the test stand for dynamic testing of insulated rotors and tests on two flying constructions, gyroplane Cavalon produced by AutoGyro GmbH Company and ultralight helicopter Dynali H3. On the test bench, a two-blade rotor, used in ultralight and unmanned helicopters, was tested. In article, the authors present importance of the proper selection and application of anti-erosion coatings on rotor blades. Discuss the behaviour of the above-mentioned constructions with main rotor blades leading edge covered anti-erosion tape, during flight tests. The results of bench tests, including the comparison of polar curves of the main rotor with anti-erosion coating and without were also presented and discussed. In the summary of this article among others the solution of technological pocked introduced in the rotor blade, corresponding to the thickness of the anti-erosion tapes, in such way that after tape is applied it does not change the contour of the blade airfoil were presented.

An innovative technique of integrating a 3D graphics engine in the visualization process of models created by computer aided design (CAD) systems

Czajkowski Ł.

Logistyka

2015

nr 3

2--6

Celem artykułu jest przedstawienie innowacyjnej techniki wizualizacji typowego projektu stworzonego przez system komputerowego wspomagania (CAD) z pomocą komercyjnego silnika graficznego powszechnie używanego do tworzenia gier komputerowych. Z perspektywy wizualizacji technika ta ma na celu zwiększenie stopnia interakcji między ostatecznym modelem wykonanym w systemie CAD, a projektantem lub osobą trzecią zainteresowaną produktem końcowym (wynikiem pracy projektanta), umożliwiając renderowanie modelu 3d, dając projektantowi lub osobom trzecim pełną kontrolę nad modelem oraz otoczeniem w czasie rzeczywistym. Z punktu widzenia fizyki technika ta daje możliwość symulowania modelu w warunkach rzeczywistych (w tym przypadku jazdy ciężarówki na drodze) zakładając warunki brzegowe, takie jak opór powietrza, przyczepność do jezdni, masa modelu, itp. Ponadto możliwa jest ocena sił działających na elementy modelu nie biorące czynnego udziału w fazie ruchu modelu (w tym przypadku sił działających na ładunek ciężarówki).

The purpose of this article is to present an innovative technique for visualizing a typical project created by computer aided design (CAD) system with the help of a commercial graphics engine commonly used for developing computer games. From the visualization perspective this technique is supposed to increase the degree of interaction between the final model made using a CAD software and the designer, or third party interested in the final product (result of the designers work), making it possible to render a 3d model, giving the designer or third party full control over the model and the scene environment in real time. From the physics perspective this technique gives the possibility to simulate the model in real conditions (in this case driving a truck on a road) setting the boundary condition such as wind resistance, road traction, model mass etc. Moreover, it is possible to assess the impact forces on the elements of the model that do not take active part in the movement phase (in this case, the forces affecting the trucks cargo).