Wyniki wyszukiwania - BazTech

1

Doświadczalne charakterystyki aerodynamiczne modelu samolotu dalekiego zasięgu ze skrzydłem o ujemnym kącie skosu w opływie symetrycznym

Olejnik A., Kachel S., Krzyżanowski A., Frant M., Skrodzki C., Jarzębiński L., Frydrychewicz A.

Biuletyn Wojskowej Akademii Technicznej

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2006

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Vol. 55, nr 4

71-88

PL

W pracy przedstawiono wyniki badań doświadczalnych charakterystyk aerodynamicznych modelu kilkumiejscowego samolotu pasażerskiego dalekiego zasięgu ze skrzydłem o ujemnym kącie skosu. Badania wykonano dla modelu w wersji jednosilnikowej i dwusilnikowej, z dodatkowymi zbiornikami na paliwo i bez zbiorników dodatkowych.

EN

The results of experimental investigations of aerodynamic characteristics of several-places long range passenger aeroplane model with a negative swept angle are presented. The investigations have been performed on the model of one-engine and double-engine version, with and without additional fuel tanks.

2

Wyzwania projektowe towarzyszące nowej generacji samolotów bezzałogowych

Goraj Z., Frydrychewicz A.

Zeszyty Naukowe Politechniki Świętokrzyskiej. Mechanika

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2004

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Z. 80

161-168

PL

W artykule przedstawiono wybrane elementy procesu projektowania samolotu bezzałogowego na przykładzie PW-114 przeznaczonego do lotów patrolowych na dużych wysokościach. Jako funkcję celu przyjęto koszt, niezawodność i wielozadaniowość.

EN

Selected design activity undertaken within the CAPECON project and devoted to development of HALE UAV being proposed for long endurance flights, has been presented. The main goal in this design process are economic effectiveness, safety and a universal, multirole electronic buys, well prepared for various sensors and different missions. The conceptual project has been developed at Warsaw University of Technology. Preliminary design is in progress now and in many aspects is support by other consortium partners, especially by IAI and ONERA. Project CAPECON No GRD1-2001-40162 supported by European Union.

3

Projektowanie zespołów głównych samolotów bezzałogowych w systemie UNIGRAPHICS

Hernik B., Gadomski J., Frydrychewicz A., Goraj Z.

Zeszyty Naukowe Politechniki Świętokrzyskiej. Mechanika

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2004

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Z. 80

205-210

PL

W artykule przedstawiono wybrane zagadnienia związane z zastosowaniem systemu UNIGRAPHICS do projektowania powierzchni bryły płatowca oraz modelowania bryłowego zespołów i podzespołów. Przedstawiono sposób opisu brył, wykorzystanie modułu złożeń oraz zasady modyfikacji. Opisano także możliwość wykorzystania wygenerowanej geometrii przez inne programy obliczeniowe.

EN

This paper presents a design procedure undertaken during development of unmanned aerial vehicles PW-103 & PW-114 at Warsaw University of Technology using UNIGRAPHICS by the research team headed by Prof. Zdobyslaw Goraj within the V FR of European Union in the CAPECON programme. UNIGRAPHICS enables the modeling of separate subsystems and a simple verification if these subsystems fit one the other when integrated. Output data is compatible with an input data needed for an advanced aerodynamic software, for example with the VSAERO input data.

4

Projekt samolotu Male UAV o podwyższonym poziomie niezawodności

Goetzendorf-Grabowski T., Frydrychewicz A., Goraj Z., Suchodolski S.

Zeszyty Naukowe Politechniki Świętokrzyskiej. Mechanika

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2004

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Z. 80

155-160

PL

W artykule przedstawiono założenia projektowe samolotu MALE UAV o podwyższonej niezawodności. Zamieszczono kolejne wersje rozwojowe projektu CAPECON wykonywanego w Politechnice Warszawskiej w ramach V PR UE. Partnerami w projekcie CAPECON są największe europejskie firmy lotnicze (EADS, Eurocopter, Agusta, IAI), instytuty badawcze (ONERA, DLR, NLR) oraz Politechniki (Turyńska, Neapolitańska oraz Bolońska).

EN

Initial requirements for MALE UAV design of an increased reliability have been presented. The successive design phases of PW-103 have been shown and described. This unmanned aircraft has been designed in Warsaw University of Technology within the framework V of European Union. The foreign partners in this project are the key aeronautical player in the Europe, namely EADS, Eurocopter, Agusta, IAI, SSC, ONERA, DLR, NLR, Torino University, Napoli University, Bologne University and others. Project CAPECON No GRD1-2001-40162 supported by European Union.

5

Electrooxidation of Poly (p-Aminoazobenzene) Films-Kinetic Studies

Frydrychewicz A., Jackowska K.

Polish Journal of Chemistry

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2004

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Vol. 78 / nr 9

1523-1532

EN

The electrooxidation of poly (p-aminoazobenzene) [poly (p-AAB)] was studied in the presence of H+ and of Fe(CN)6 4 ions by the means of cyclic voltammetry, chronoamperometry and rotating disc electrode. The diffusion coefficients and heterogeneous rate constants were determined from the analysis of Cottrell and Levich-Koutecky plots. It has been found, that the oxidation of poly (p-AAB) in acidic solution is kinetically controlled and independent of the transport of H+ ions to the polymer surface. The results obtained in the presence of Fe(CN)6 4 have shown that poly (p-AAB) films are permeable to the ions from electrolyte solution.

6

High altitude long endurance unmanned aerial vehicle of a new generation - a design challenge for a low cost, reliable and high performance aircraft

Goraj Z., Frydrychewicz A., Świtkiewicz R., Hernik B., Gadomski J., Goetzendorf-Grabowski T., Figat M., Suchodolski S.

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2004

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Vol. 52, nr 3

173-194

EN

This paper describes a design process of HALE PW-114 sensor-craft, developed for high altitude (20 km) long endurance (40 h) surveillance missions. Designed as a blended wing (BW) configuration, to be made of metal and composite materials. Wing control surfaces provide longitudinal balance. Fin in the rear fuselage section together with wingtips provide directional stability. Airplane is equipped with retractable landing gear with controlled front leg that allows operations from conventional airfields. According to the initial requirements it is twin engine configuration, typical payload consists of electro-optical/infra-red FLIR, big SAR (synthetic aperture radar) and SATCOM antenna required for the longest range. Tailless architecture was based on both Horten and Northrop design experience. Global Hawk was considered as a reference point - it was assumed that BW design has to possess efficiency, relative payload and other characteristics at least the same or even better than that of Global Hawk. FLIR, SAR and SATCOM containers were optimised for best visibility. All payload systems are put into separate modular containers of easy access and quickly to exchange, so this architecture can be consider as a "modular". An optimisation process started immediately when the so-called "zero configuration", called PW-l11 was ready. It was designed in the canard configuration. A canard was abandoned in HALE PW-113. Instead, new, larger outer wing was designed with smaller taper ratio. New configuration analysis revealed satisfactory longitudinal stability. Calculations suggested better lateral qualities for negative dihedral. These modifications, leading to aerodynamic improvement, gave HALE PW-114 as a result. The design process was an interdisciplinary approach, and included a selection of thick laminar wing section, aerodynamic optimisation of swept wing, stability analysis, weight balance, structural and flutter analysis, many on-board redundant systems, reliability and maintability analysis, safety improvement, cost and performance optimisation. Presented paper focuses mainly on aerodynamics, wing design, longitudinal control and safety issues. This activity is supported by European Union within V FR, in the area Aeronautics and Space.

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Fire fighting aircraft of medium capacity - from concept to design layout

Frydrychewicz A., Goraj Z., Ransom E., Wagstaff P.

Research Bulletin / Warsaw University of Technology, Institute of Aeronautics and Applied Mechanics

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1998

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nr 8

181-194

EN

This paper presents an evaluation of available aircraft types and demonstrates the lack of a low cost aircraft optimised for fighting forest fires, spreading viscous liquids for land reclamation and spraying pesticides over forest areas. It shows that among critical areas demanding special consideration are (1) the development of mathematical models for the water bomb/aircraft separation and the aircraft stability following separation, (2) the identification of parameters influencing the coherence of the water column, effectiveness of the water delivery for fire-fighting (3) choice of aircraft configuration and (4) hopper configuration. The main aerodynamic characteristics of the selected aircraft have been computed by means of panel methods. Design and numerical analysis has led to the selection of the biplane as the best aircraft and hopper configuration. Another important concept - developed at PZL-Okęcie and presented in this paper - consists in using parts of the design from existing aircraft. The pilot's cabin, the rear part of the fuselage with control surfaces and wings originate from the PZL-106 KRUK. This diminishes the cost of design and prototype construction as well as of the cost of the airplane production. It has been shown that an important cost factor in the operation of such a fire-fighting aircraft is the weight of the agent which may be carried for the same fuel consumption. This cost factor, representing the economical efficiency of a fire-fighting aircraft has been computed and compared for a number of fire-fighting aircraft. The design under consideration (called PZL-240 PELIKAN) has the above-mentioned factor equal to 14, whereas the average value for other aircraft is about 8.