Mechanical and Thermal Load Effect on Piston Crown of a Biogas Engine: A Simulation Approach

Authors

Truc Nguyen The
Anh Duc Tran
Cam Van Nguyen
Khac Tung Nguyen
Dinh Long Hoang
Xuan Phong Trinh
Nguyen Duc Khanh

Abstract

This paper presents the study results on stress and deformation of the piston crown of a biogas engine converted from a conventional diesel engine using dedicated software. The original diesel engine was modified to reduce the compression ratio to suit biogas fuel. The original engine's combustion chamber and compression ratio were changed by modifying the piston crown to a heron type. The parameters of in-cylinder pressure and temperature were determined by the thermodynamic simulation software AVL Boost. Research results show that the in-cylinder pressure decreased compared to diesel when using biogas fuel, but the temperature increased. The infinite element method-based software was used to simulate the effects of mechanical and thermal load on stress and deformation on the piston crown of the biogas engine. As modeling with maximum pressure and temperature, the maximum stress on the piston crown was 3.425x109 N/m2 and 4.224x109 N/m2 for diesel and biogas. However, the maximum deformation in the biogas case was lesser than diesel, 0.3037 and 0.4186 mm. The minimum safety factor was 0.1012 and 0.0891 for diesel and biogas models, respectively.

Publication Date

12-25-2022

Recommended Citation

The, Truc Nguyen; Tran, Anh Duc; Nguyen, Cam Van; Nguyen, Khac Tung; Hoang, Dinh Long; Trinh, Xuan Phong; and Khanh, Nguyen Duc (2022) "Mechanical and Thermal Load Effect on Piston Crown of a Biogas Engine: A Simulation Approach," ASEAN Journal on Science and Technology for Development: Vol. 39: No. 3, Article 4.
DOI: https://doi.org/10.29037/ajstd.870
Available at: https://ajstd.ubd.edu.bn/journal/vol39/iss3/4