Thermal Load Analysis of Piston Damaged by Wall-Wetting Combustion in a Heavy-Duty Diesel Engine

Haiying Li, Yaozong Li, Yanzhao An (), Yi Zhang, Zhicheng Shi, Weiqing Zhu, Yongping Qiang and Ziyu Wang
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Haiying Li: China North Engine Research Institute, Tianjin 300400, China
Yaozong Li: China North Engine Research Institute, Tianjin 300400, China
Yanzhao An: State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
Yi Zhang: School of Energy and Power Engineering, North University of China, Taiyuan 038507, China
Zhicheng Shi: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Weiqing Zhu: China North Engine Research Institute, Tianjin 300400, China
Yongping Qiang: China North Engine Research Institute, Tianjin 300400, China
Ziyu Wang: China North Engine Research Institute, Tianjin 300400, China

Sustainability, 2023, vol. 15, issue 19, 1-19

Abstract: Piston damage is a frequent problem of engine durability and plays an important role in an engine’s performance design. Recently, a large amount of piston erosion has occurred in a series of heavy-duty diesel engines. To investigate the reason for the piston erosion, a study of the computational fluid dynamics (CFD) of the combustion process in the cylinder and finite element analysis (FEA) of piston was carried out under different initial temperatures. The results show that when the initial temperature decreases from 380 K to 307 K, the mass of wall-wetting increases by 73%, and the maximum combustion pressure increases from 8.1 MPa to 11 MPa; when the initial temperature decreases from 350 K to 328 K, the highest temperature at the throat of the valve pocket increases by nearly 100 K, doubling the temperature fluctuation; and in the case of 328 K, areas exceeding 700 K are concentrated on the top surface of the piston, and the temperature gradient in the depth direction of the throat position decays rapidly.

Keywords: wall-wetting; computational fluid dynamics; finite element analysis; piston; damage (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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