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Mathematical Problems in Engineering
Volume 2015, Article ID 176893, 11 pages
http://dx.doi.org/10.1155/2015/176893
Research Article

Interring Gas Dynamic Analysis of Piston in a Diesel Engine considering the Thermal Effect

1College of Power and Energy Engineering, Harbin Engineering University, Harbin, Heilongjiang 150001, China
2Washington University in St. Louis, St. Louis, MO 63108, USA

Received 28 August 2014; Accepted 10 November 2014

Academic Editor: Woo-Young Jung

Copyright © 2015 Wanyou Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Understanding the interaction between ring dynamics and gas transport in ring pack systems is crucial and needs to be imperatively studied. The present work features detailed interring gas dynamics of piston ring pack behavior in internal combustion engines. The model is developed for a ring pack with four rings. The dynamics of ring pack are simulated. Due to the fact that small changes in geometry of the grooves and lands would have a significant impact on the interring gas dynamics, the thermal deformation of piston has been considered during the ring pack motion analysis in this study. In order to get the temperature distribution of piston head more quickly and accurately, an efficient method utilizing the concept of inverse heat conduction is presented. Moreover, a sensitive analysis based on the analysis of partial regression coefficients is presented to investigate the effect of groove parameters on blowby.