Publication detail

Advanced Computational Analysis of Connecting Rod of an Aircraft Engine

DLUGOŠ, J. NOVOTNÝ, P. RAFFAI, P.

Czech title

Pokročilá výpočtová analýza ojnice leteckého motoru

English title

Advanced Computational Analysis of Connecting Rod of an Aircraft Engine

Type

journal article - other

Language

en

Original abstract

Development of internal combustion engine’s components is based on the use of advanced computational models in order to compare and verify the individual design proposals. Connecting rod, which performs a general planar motion, is exposed to the gas pressure forces, inertia, contacts, and hydrodynamic pressure during the engine operation cycle. To incorporate all these aspects, Finite Element Method (FEM) is extended by Finite Difference Method (FDM) simulating a slide bearing of connecting rod’s end. It includes different properties of lubricating oil (pressure and temperature dependent viscosity and density) and elastic deformations, so the pressure distribution in an oil film can be evaluated. The computational process concludes with an estimation of the endurance safety factor of the connecting rod. The four-cylinder inverted aircraft engine is used as an example.

Czech abstract

Vývoj částí vnitřně spalovacího motoru je založen na použití pokročilých výpočtových modelů v rámci porovnání a ověření jednotlivých konstrukčních návrhů. Ojnice, která vykonává obecný rovinný pohyb, je vystavená tlaku spalin, setrvačnosti, kontaktům a hydrodynamickému tlaku v průběhu pracovního cyklu motoru. Aby byly všechny tyto vlivy zahrnuty, je metoda konečných prvků (MKP) rozšířená o metodu konečných diferencí (MKD), která simuluje kluzné ložisko ojnice. Pracuje s proměnnými vlastnostmi maziva (viskozita a hustota oleje časově závislá na teplotě a tlaku) a s elastickými deformacemi, takže tlakové rozložení v olejové vrstvě může být vyčísleno. Výpočtový proces je završen vyhodnocením koeficientu bezpečnosti vůči meznímu stavu únavové pevnosti. Příklad užití metody byl aplikován na čtyrválcový invertní letecký motor.

English abstract

Development of internal combustion engine’s components is based on the use of advanced computational models in order to compare and verify the individual design proposals. Connecting rod, which performs a general planar motion, is exposed to the gas pressure forces, inertia, contacts, and hydrodynamic pressure during the engine operation cycle. To incorporate all these aspects, Finite Element Method (FEM) is extended by Finite Difference Method (FDM) simulating a slide bearing of connecting rod’s end. It includes different properties of lubricating oil (pressure and temperature dependent viscosity and density) and elastic deformations, so the pressure distribution in an oil film can be evaluated. The computational process concludes with an estimation of the endurance safety factor of the connecting rod. The four-cylinder inverted aircraft engine is used as an example.

Keywords in Czech

kontaktní tlak, elastohydrodynamický režim mazání, kluzné ložisko

Keywords in English

Contact Pressure, Elastohydrodynamic Lubrication, Slide Bearing

Released

11.01.2016

Publisher

Trans Tech Publications Inc.

Location

Switzerland

ISSN

1662-7482

Volume

821

Number

1

Pages from–to

199–206

Pages count

814

BIBTEX


@article{BUT122870,
  author="Jozef {Dlugoš} and Pavel {Novotný} and Peter {Raffai},
  title="Advanced Computational Analysis of Connecting Rod of an Aircraft Engine",
  year="2016",
  volume="821",
  number="1",
  month="January",
  pages="199--206",
  publisher="Trans Tech Publications Inc.",
  address="Switzerland",
  issn="1662-7482"
}