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TsAGI Science Journal

ISSN Druckformat: 1948-2590
ISSN Online: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.2018027031
pages 175-190

EMPIRICAL MATHEMATICAL MODELS IN OPTIMAL DESIGN OF THE ENGINE NACELLE SUSPENSION UNIT UNDER AN AIRCRAFT WING

Nikolay Alekseevich Zlenko
Central Aerohydrodynamic Institute (TsAGI) 1, Zhukovsky str., Zhukovsky, 140180, Moscow region, Russia
Evgenii Sergeevich Matyash
Central Aerohydrodynamic Institute (TsAGI), 1, Zhukovsky Str., Zhukovsky, Moscow Region, 140180, Russian Federation
Sergey Vladimirovich Mikhaylov
Central Aerohydrodynamic Institute (TsAGI) 1, Zhukovsky str., Zhukovsky, 140180, Moscow region, Russia
Andrey Aleksandrovich Savelyev
Central Aerohydrodynamic Institute (TsAGI), 1 Zhukovsky St., Zhukovsky, Moscow Region, 140180 Russia

ABSTRAKT

We propose an algorithm for optimal aerodynamic design of the suspension unit of a propulsion system nacelle that is located under the wing of a passenger aircraft, with structure drag and balancing losses taken into account. Optimal angles of nacelle and pylon shape spatial orientation are chosen using empirical mathematical models. The models are based on results of parametric numerical computations of flow around the aircraft configuration and integral characteristics with a turbojet bypass engine. The abilities of the proposed approach for improving the propulsion system suspension unit are demonstrated after solving problems of optimizing pylon shape, nacelle mounting angle, and tail fins of a medium-haul passenger aircraft.


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