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Experimental and simulation study on aluminium alloy piston based on thermal barrier coating
Yang Liu1,2, Jilin Lei3,4, Xiaoqiang Niu1,2
1Yunnan Key Laboratory of Internal Combustion Engines, Kunming University of Science and Technology, Kunming, 650500, People's Republic of China.
Scientific Reports
|June 29, 2022
Summary
Thermal barrier coatings (TBCs) significantly reduce piston temperatures and improve engine performance. This study simulated TBC pistons, showing reduced thermal stress and deformation compared to traditional aluminum pistons.
Area of Science:
- Materials Science
- Mechanical Engineering
- Combustion Engines
Background:
- Thermal barrier coatings (TBCs) are crucial for enhancing engine efficiency and durability.
- Reducing high operating temperatures in pistons is essential for preventing material degradation and improving performance.
Purpose of the Study:
- To investigate the thermal and mechanical behavior of TBC pistons in a high-pressure common-rail diesel engine.
- To analyze the temperature, stress, and deformation characteristics of TBCs on a piston matrix.
Main Methods:
- Finite element simulation model of a TBC piston.
- Analysis of temperature field, stress, and deformation under rated power and maximum torque conditions.
Main Results:
- TBC pistons showed a 12.2%-13.73% reduction in maximum temperature compared to aluminum pistons.
- Thermal stresses were reduced by 25.9%-26.8%, while thermo-mechanical stress slightly increased.
- Radial thermal and thermo-mechanical coupling deformation decreased in TBC pistons.
Conclusions:
- TBCs effectively lower piston operating temperatures and reduce thermal stress and deformation.
- The study provides valuable insights into the performance enhancement of TBC pistons in diesel engines.
