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  5. The algorithm for the selection of rational project parameters of fenestron

The algorithm for the selection of rational project parameters of fenestron

V. Tavrin, A. Yevpak, A. Petrenko
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Description: Currently, helicopter companies in Europe, the United States and Russia have already built quite a large number of singlepropeller helicopters, which use fenestron as an alternative to a conventional propeller. When designing a fenestron many problems are solved, and first of all, the developers face a problem of determining the most preferable aerodynamic layout of the “ propeller in the ring” system and selecting its design parameters. At the same time, more attention is paid to the study of aerodynamic characteristics and the solution of problems associated with the controlling and stability of a helicopter with this steering device. At the same time, the parameters of the fenestron and the keel substantially effect all the characteristics of the helicopter, including the performance indicators of its application when a helicopter performs various types of tasks. Therefore, the development of the calculation algorithm, as well as the development of recommendations for the choice of most preferable design parameters fenestron is relevant. The purpose of the article is to work out the algorithm for selecting most preferable design parameters of the fenestron with a keel which is used as a steering device on a helicopter of a single- propeller scheme based on the developed algorithm. The methods of aerodynamic design of the tail propeller (fenestron) in the annular channel of a helicopter single- propeller scheme in the form of an axial fan made according to the impeller scheme, with a rectifier behind it, are analyzed. On the basis of the analysis performed, the main formula dependencies of the design parameters of the fenestron on its geometric parameters are presented. An algorithm is presented for selecting rational design parameters of a fenestron with a keel, which is used as a steering system on a single- propeller helicopter. Thus, the developed algorithm allows to solve the problem of calculating and selecting most preferable design parameters of the fenestron. In the future, the developed algorithm will be used to select the parameters of the fenestron in the helicopter being designed.


Keywords: aerodynamic characteristics, algorithm, single-rotor helicopter, tail rotor, fenestron

References

1. Shaydakov, V.I. (1996), “Aеrodynamyka vynta v koltse” [Aerodynamics propeller in the ring], MAI, Moscow, 88 p.

2. Shaydakov, V.I. and Zavalov, O.A. (1980), “Aerodinamicheskoe proektirovanie fenestrona” [Aerodynamic design of helicopter fenestron], MAI, Moscow, 66 p.

3. Manuchehrifar, A. (1999), “Energeticheskiy analiz i vyibor proektnyih parametrov rulevogo ustroystva odnovintovogo vertoleta tipa fenestrona: dyssertatsyia” [Energy analysis and selection of design parameters for of a single-propeller helicopter of the fenestron type: dissertation], Moscow, 163 p.

4. Shaydakov, V.I. (1959), “Aerodinamicheskie issledovaniya sistemyi “vint v koltse” na rezhime viseniya” [Aerodynamic studies of the system “propeller in the ring” on the mode of hovering], Research in the field of theoretical and applied aerohydrodynamics, Defense, Moscow, 234 p.

5. Shaydakov, V.I. (1960), “Vliyanie glubinyi raspolozheniya vinta v koltse na aerodinamicheskie harakteristiki sistemyi dlya rezhima rabotyi na meste” [Influence of the depth of the propeller in the ring on the aerodynamic characteristics of the system for on-site operation], Aviation equipment, No. 2, 342 p.

6. Barshai, M.M. (1977), “Vihrevaya teoriya fenestrona” [Vortex theory of fenestron], Proceedings of Design Bureau, No. 10, Moscow.

7. Lepilkin, A.M. (1984), “Teoreticheskoe i eksperimentalnoe issledovanie aerodinamiki fenestrona” [Theoretical and experimental study of the aerodynamics of fenestron], Proceedings of Design Bureau, Nо. 12, 153 p.
8. Shaidakov, V.I. (1988), “Aerodinamicheskiy raschet vertoleta” [Aerodynamic design helicopter], Moscow, 178 p.

9. Shaidakov, V.I. (1998), “Aerodinamika vinta v koltse s kollektorom i tsilindricheskim diffuzorom ogranichennoy dlinyi” [Aerodynamics propeller in the ring with a collector and a cylindrical diffuser of limited length], Report of the third forum of the Russian helicopter society, Moscow.

10. Khanzhonkov, V.I. (1972), “Aerodinamika apparatov na vozdushnoy podushke” [Aerodynamics of hovercraft], Moscow, 328 p.

11. Khanzhonkov, V.I. (1953), “Aerodinamicheskie harakteristiki kollektorov” [Aerodynamic characteristics of collectors], Industrial Aerodynamics, CAHI, Moscow, pp. 45-62.

12. Kalinushkin, M.P. (1962), “Ventilyatornyie ustanovki” [Propeller units], Moscow, 294 p.

13. Shaydakov, V.I. (2013), “Aerodinamika vinta v koltse s kollektorom i korotkim diffuzorom v rezhime rabotyi na meste” [Aerodynamics screw in the ring with a collector and a short diffuser in the mode of work on site], Bulletin of the Moscow Aviation Institute, Vol. 20, No. 4, MAI, Moscow, pp. 36-46.

14 Moizykh, E.I., Kuznetcov, A.V. and Zavalov, O.A. (2012), “Eksperimentalnyie issledovaniya aerodinamicheskih harakteristik distantsionno-pilotiruemogo letatelnogo apparata s nesuschey sistemoy “vint v koltse”” [Experimental study of aerodynamic characteristics of the remotely-piloted aircraft from the carrier system “propeller in the ring”], Elektronnyj zhurnal “Trudy MAI”, available at: https://mai.ru/publications/index.php?ID=26557.

15. Russier, M. (1990), The Fenestron Antitorque Concept, The Royal Aeronautical Society Conference on Helicopter Yaw Control Concepts, London.

Reference:
 Tavrin, V.A., Yevpak, A.A. and Petrenko, A.V. (2019), “Alhorytm vyboru ratsionalnykh proektnykh parametriv fenestrona” [The algorithm for the selection of rational project parameters of fenestron], Science and Technology of the Air Force of Ukraine, No. 2(35), pp. 104-112. https://doi.org/10.30748/nitps.2019.35.13.