Analysis of capability to discovering the internal defect of fibrous polymer composite by thermographic method

W artykule poruszono zagadnienie wykrywania wad wewnętrznych polimerowych kompozytów włóknistych metodą termografii. W celu weryfikacji jej efektywności przeprowadzono badanie z wykorzystaniem metody stymulacji długim impulsem próbek materiałów kompozytowych z celowo wprowadzonymi defektami.The article discussed the issue of detection of internal defects of fibrous composite polymerthermography method. In order to verify its effectiveness study was carried out using the method of simulation a long pulse samples of composite materials with deliberately introduced defects

The use of technology of spatial printing in designing the PZL-10W engine model

The aim of this paper is to present the possibilities of using 3D spatial printing technology to create complex models, e.g. turbine helicopter engines, PZL-10W type, operated on the W-3 “Sokół” helicopter. We have presented the process of creating a spatial model using CAD software. It required a careful selection of the parts necessary for its manufacture as well as elimination of minor parts, which were insignificant from the functional and educational perspective of the model. We presented the type of printer which was used to prepare the model, and also its software. The verification of the correctness of designing the files for particular parts was made with Netfabb software. Proper verification affected the choice of files to be sent to the 3D printer software, where they underwent further slight changes concerning, among others, the thickness of the layers and the percentage of filling the interior of the individual parts of the engine. The printouts of the selected engine parts have been shown in the photographs. We also (briefly) described the processes of treatment of the parts, their labour intensity as well as the hardware used on a regular basis for this purpose. Finally, we discussed the assembly process of the entire engine. In conclusion, we stressed the importance of the model as a significant didactic aid which is to support the process of acquiring knowledge related to the construction, kinematics and operation of the turbine engine. We also specified the amount of used materials, labour consumption (in man-hours) with regard to the same printout of the parts as well as the finishing works

CFD analysis of the influence of flaps extension on the aerodynamic characteristics of the M-28 Bryza aircraft

The paper presents a modelling procedure of the M-28 Bryza wing with extended flaps and Computational Fluid Dynamics (CFD) simulations results preformed in order to assess the performance of the investigated wing for various flap extension rates. The M-28 Bryza is a two-engine high-wing aircraft used in the Polish Air Force for short distance airlift of people and equipment. The aim of this work was to determine the aerodynamic characteristics of the investigated wing. The CFD simulations were performed in order to investigate the influence of flap extension on lift and drag coefficients at various angles of attack. In order to validate the results of two different commercial CFD packages were used. The findings are presented in the form of flow visualization and aerodynamic characteristics. The typical and non-standard extension rates were investigated for low, moderate and high angles of attack. The results correlated with the limitations specified in the aircraft manual. The outcome of the presented work confirmed the feasibility of the presented methodology for its use as a supportive tool for providing additional information about airplane performance in standard and non-standard conditions of flight such as landing with one engine working. The results of work might prove useful for M-28 Bryza pilots and maintenance personnel as well as for educational purposes

Wizualizacja przepływu wokół modelu skrzydła z mechanizacją w tunelu wodnym

This paper demonstrates the feasibility of using-a water tunnel for the visualisation of flow in airfoils with flight control systems in the form of slots and flaps. Furthermore, the issue of using water tunnels for scientific and training purposes was explained. The technology of 3D printed models for practical tests in a water tunnel was also presented. The experiment included conducting flow visualisation tests for three airfoil models: with the Clark Y 11.7% as the base airfoil and the same airfoil with a slot and a flap. Moreover, a modification to dye injection system was introduced. The presented results of flow visualisation around models with the use of dye, confirmed the effectiveness of the applied methodology. The results and conclusions may be utilized to verify most flow-related issues in hydrodynamic tunnels and can also be used as a training element.W pracy przedstawiono uzasadnienie możliwości zastosowania tunelu wodnego do wizualizacji przepływu modeli profili lotniczych z mechanizacją w postaci slotów i klap. Ponadto przybliżono tematykę zastosowania tuneli wodnych w celach naukowych jak i szkoleniowych. Przedstawiono również technologię wydruku 3D modeli do testów praktycznych w tunelu wodnym. Eksperyment obejmował przeprowadzenie badań wizualizacyjnych dla trzech modeli profilu lotniczego: jako bazowy profil Clark Y 11.7% oraz ten sam profil ze slotem i z klapą. Ponadto autorzy pracy wprowadzili modyfikację wprowadzania barwnika przed badany model geometryczny umiejscowiony na trzymaku w przestrzeni pomiarowej. Przedstawione wyniki zobrazowania przepływał w:okół modeli za pomocą barwnika potwierdziły skuteczność zastosowanej metodyki prowadzenia eksperymentu na charakterystycznych kątach natarcia. Wyniki i wnioski można wykorzystać do zweryfikowania większości zagadnień przepływowych w tunelach hydrodynamicznych jak również mogą posłużyć jako element szkoleniowy