Technologies and studies of gas exchange in two-stroke aircraft piston engine: A review

Zhou, Yu; LI, Xueyu; Ding, Shuiting; Zhao, Shuai; Zhu, Kun; Shao, Longtao; Du, Feng; WANG, Gerui; Xu, Zheng

doi:10.1016/j.cja.2022.08.012

Cited by 15 publications

(2 citation statements)

References 86 publications

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“…Many studies have examined the effects of thermal barrier coatings on the pistons of internal combustion engines, particularly how it reduces the amount of heat that is rejected from the cylinder in adiabatic engines (Durat et al, 2012;Tan et al, 2022;Zhou et al, 2022). The combustion process and exhaust emission characteristics are, however, affected by the insulation of the engine piston.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional CFD-solid mechanics analysis of the hydrogen internal combustion engine piston subjected to thermomechanical loads

Al-Baghdadi

Ahmed

Ghyadh

2023

Int. J. Renew. Energy Dev.

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Fueling internal combustion engines with hydrogen is one of the most recommended alternative fuels today in order to combat the energy crisis, pollution problems, and climate change. Despite all the advantages of hydrogen fuel, it produces a higher combustion temperature than gasoline. In an internal combustion engine, the piston is among the numerous complex and highly loaded components. Piston surfaces are directly affected by combustion flames, making them critical components of engines. To examine the stress distribution and specify the critical fracture zones in the piston for hydrogen fuel engines, a three-dimensional CFD-solid-mechanics model of the internal combustion engine piston subjected to real thermomechanical loads was analyzed numerically to investigate the distribution of the temperature on the piston body, the interrelated thermomechanical deformations map, and the pattern of the stresses when fueling the engine with hydrogen fuel. With the aid of multiphysics COMSOL software, the CFD-solid-mechanics equations were solved with high accuracy. Despite the increase in pressure on the piston and its temperature when the engine is running on hydrogen fuel, the results show that the hydrogen fuel engine piston can withstand, safely, the thermomechanical loads. In comparison to gasoline fuel, hydrogen fuel caused a deformation of 0.34 mm, an increase of 17%. This deformation is within safe limits, with an average clearance of 0.867 mm between the cylinder liner and piston.

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Section: Introductionmentioning

confidence: 99%

Three-dimensional CFD-solid mechanics analysis of the hydrogen internal combustion engine piston subjected to thermomechanical loads

Al-Baghdadi

Ahmed

Ghyadh

2023

Int. J. Renew. Energy Dev.

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“…Zhou Y et al analyzed the trends of cutting-edge technologies and the theory of gas exchange [25,26]. James W. G. compared different scavenging systems for 2-stroke engines, which showed that the opposed-piston has the best scavenging effect and the highest thermal efficiency, because the structure can achieve maximum thermal expansion and minimum heat loss [27].…”

Section: Introductionmentioning

confidence: 99%

Study of Scavenging and Combustion Processes for Small Two-Stroke Aviation Heavy Fuel Direct Injection Engines

et al. 2023

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Heavy-fuel aviation piston engines (HF-APEs) are widely used in general aviation and unmanned aerial vehicle (UAV) due to their safety and fuel economy. This paper describes a numerical and experimental study of scavenging and combustion processes on a 2-Stroke Direct Injected HF-APEs for light aircraft, with its cylinder specifically designed as cross scavenging. A 3-Dimentional transient model of in-cylinder flow and combustion process is established by the Forte platform, and the engine test system is set up. By comparing the simulation results to the experimental results, it showed that multi-ports cross scavenging can generate unbalanced aerodynamic torque in the cylinder. In the compression process, the swirl ratio (SR) gradually increases, and the peak SR reaches 15. Moreover, approximately 25% of exhaust residual gas in the cylinder is conducive to the fuel atomization and evaporation process in a high-altitude environment. When the injection timing is between −8 °CA and −16 °CA, the engine has the optimal power and economy performance at different altitudes. Finally, when the injection advance angle moves forward by 4 °CA, the maximum pressure increases by 2 MPa, with the rising rate decreasing gradually. The results have important significance for the development of the combustion system of small 2-Stroke Direct Injected HF-APEs.

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The effect of high altitude environment on diesel engine performance: Comparison of engine operations in Hangzhou, Kunming and Lhasa cities

Liu

Zhang

et al. 2022

Chemosphere

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Technologies and studies of gas exchange in two-stroke aircraft piston engine: A review

Cited by 15 publications

References 86 publications

Three-dimensional CFD-solid mechanics analysis of the hydrogen internal combustion engine piston subjected to thermomechanical loads

Three-dimensional CFD-solid mechanics analysis of the hydrogen internal combustion engine piston subjected to thermomechanical loads

Study of Scavenging and Combustion Processes for Small Two-Stroke Aviation Heavy Fuel Direct Injection Engines

The effect of high altitude environment on diesel engine performance: Comparison of engine operations in Hangzhou, Kunming and Lhasa cities

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