Shahmohammdi_et_al_2013_Trib_Letts.pdf (992.78 kB)
Download file

Thermo-mixed hydrodynamics of piston compression ring conjunction

Download (992.78 kB)
journal contribution
posted on 06.08.2013, 10:32 authored by Hamed Shahmohamadi, Ramin RahmaniRamin Rahmani, Homer Rahnejat, Colin GarnerColin Garner, Paul KingPaul King
A new method, comprising Navier-Stokes equations, Rayleigh-Plesset volume fraction equation, an analytical control-volume thermal mixed approach and asperity interactions is reported. The method is employed for prediction of lubricant flow and assessment of friction in the compression ring-cylinder liner conjunction. The results are compared with Reynolds-based laminar flow with Elrod cavitation algorithm. Good conformance is observed for medium load intensity part of the engine cycle. At lighter loads and higher sliding velocity, the new method shows more complex fluid flow, possessing layered flow characteristics on account of pressure and temperature gradient into the depth of the lubricant film, which leads to a cavitation region with vapour content at varied volume fractions. Predictions also conform well to experimental measurements reported by other authors.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Citation

SHAHMOHAMADI, H. ... et al, 2013. Thermo-mixed hydrodynamics of piston compression ring conjunction. Tribology Letters, 51 (3), pp.323-340.

Version

AM (Accepted Manuscript)

Publication date

2013

Notes

The final publication is available at http://link.springer.com.

ISSN

1023-8883

eISSN

1573-2711

Language

en