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Numerical Simulation of the Effect of In-Cylinder Water Spraying on the Knock and Combustion Characteristics of a Hydrogen-Argon Oxygen Engine
Technical Paper
2023-01-7024
ISSN: 0148-7191, e-ISSN: 2688-3627
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Language:
English
Abstract
Fossil fuel depletion and air pollution have accelerated the transformation and
upgrading of the internal combustion engine industry. The argon-oxygen
atmosphere engine has the advantages of “zero emission” and high thermal
efficiency, but the knocking problem constrains the engine to operate at a lower
compression ratio. In this paper, the effect of water spraying technology on the
knocking combustion and combustion characteristics of a hydrogen-argon oxygen
engine is investigated by numerical simulation. A one-dimensional thermodynamic
model and a three-dimensional numerical model of the hydrogen-argon oxygen
engine are established and validated by aligning the model with the data of the
real engine. Firstly, investigate the effect of in-cylinder water spraying
timing on knock suppression and combustion characteristics of hydrogen argon
oxygen engines. 570 ° CA to 600 ° CA is the optimal water spraying timing range
for suppressing knock. When 570 ° CA is sprayed, the atomization effect of
droplets in the cylinder is good, and the combustion and power characteristics
are significantly improved. At this time, the water spraying IMEP increases by
14.45%. Therefore, 570 ° CA is selected as the optimal spraying timing. On this
basis, the effect of in-cylinder water spraying mass on the knock suppression
and combustion characteristics of the hydrogen-argon oxygen engine is further
investigated. When the water spraying mass reaches 24 mg, the knock intensity KI
droppes to 0.170 MPa, and the knock phenomenon has been effectively suppressed.
There is no obvious numerical change in KI when the water spraying mass
continues to increase. In terms of power performance, IMEP increases with water
spraying mass and then decreases, and the maximum value of 6.357 bar is achieved
at 25 mg of water spraying mass, which proves that in-cylinder water spraying
can effectively suppress the hydrogen-argon oxygen engine knock phenomenon while
improving the engine power performance.
Authors
- Kai Pang - Tianjin University, Institute of Internal Combustion Engines
- Xizhe Zhang - Tianjin University, Institute of Internal Combustion Engines
- Chaobo Huo - Tianjin University, Institute of Internal Combustion Engines
- Yuliang Xu - Tianjin University, Institute of Internal Combustion Engines
- Bingfeng Zu - Tianjin University, Institute of Internal Combustion Engines
Topic
Citation
Pang, K., Zhang, X., Huo, C., Xu, Y. et al., "Numerical Simulation of the Effect of In-Cylinder Water Spraying on the Knock and Combustion Characteristics of a Hydrogen-Argon Oxygen Engine," SAE Technical Paper 2023-01-7024, 2023.Also In
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