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
conference paper
Language
en
Original abstract
Development of internal combustion engine's components is based on the use of the 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 finishes 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 the 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 finishes 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
RIV year
2015
Released
11.05.2015
Publisher
Academy of Sciences of the Czech Republic, v.v.i.
Location
Prague, Czech Republic
ISBN
978-80-86246-42-0
ISSN
NEUVEDENO
Book
ENGINEERING MECHANICS 2015 - 21st INTERNATIONAL CONFERENCE
Edition number
1
Pages from–to
48–49
Pages count
2
BIBTEX
@inproceedings{BUT114726,
author="Jozef {Dlugoš} and Pavel {Novotný} and Peter {Raffai},
title="Advanced Computational Analysis of Connecting Rod of an Aircraft Engine",
booktitle="ENGINEERING MECHANICS 2015 - 21st INTERNATIONAL CONFERENCE",
year="2015",
month="May",
pages="48--49",
publisher="Academy of Sciences of the Czech Republic, v.v.i.",
address="Prague, Czech Republic",
isbn="978-80-86246-42-0",
issn="NEUVEDENO"
}