LAPSE:2023.24336
Published Article
LAPSE:2023.24336
Effects of Injector Spray Angle on Performance of an Opposed-Piston Free-Piston Engine
Qinglin Zhang, Zhaoping Xu, Shuangshuang Liu, Liang Liu
March 28, 2023
A free-piston engine is a novel internal combustion engine which has the advantages of a variable compression ratio and multi-fuel adaptability. This paper focuses on numerical simulation for combustion process and spray angle optimization of an opposed-piston free-piston engine. The working principle and spray-guided central combustor structure of the engine are discussed. A three-dimensional computational fluid dynamic model with moving mesh is presented based on the tested piston motion of the prototype. Calculation conditions, spray models, and combustion models were set-up according to the same prototype. The effects of spray angle on fuel evaporation rate, mixture distribution, heat release rate, in-cylinder pressure, in-cylinder temperature, and emissions were simulated and analyzed in detail. The research results indicate that the performance of the engine was very sensitive to the spray angle. The combustion efficiency and the indicated thermal efficiencies of 97.5% and 39.7% were obtained as the spray angle reached 40°.
Keywords
combustion, Computational Fluid Dynamics, free-piston engine, performance, spray angle
Suggested Citation
Zhang Q, Xu Z, Liu S, Liu L. Effects of Injector Spray Angle on Performance of an Opposed-Piston Free-Piston Engine. (2023). LAPSE:2023.24336
Author Affiliations
Zhang Q: School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Xu Z: School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China [ORCID]
Liu S: School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Liu L: School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China [ORCID]
Journal Name
Energies
Volume
13
Issue
14
Article Number
E3735
Year
2020
Publication Date
2020-07-20
Published Version
ISSN
1996-1073
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PII: en13143735, Publication Type: Journal Article
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LAPSE:2023.24336
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doi:10.3390/en13143735
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