Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
Influence of injection strategy on combustion characteristics of methanol/gasoline rotary engine
| DOI: | 10.11809/bqzbgcxb2025.01.022 |
| Keywords: | rotary engine; methanol/gasoline; direct injection; jet ignition; injection strategy; in cylinder combustion |
| Abstract: | The study focuses on the direct injection methanol/gasoline rotary engine. Using the CONVERGE software, the three dimensional model of the rotary engine is meshed, and the RNG k ε turbulence model, SAGE combustion model, and DPM spray model are selected to establish the numerical simulation model for the direct injection methanol/gasoline rotary engine. The research results indicate that the error between experimental data and simulation data does not exceed 5%, which is within a reasonable range, indicating the reliability of the model. Subsequently, the research explores the impact of different injection strategies on the in cylinder flow field and flame propagation of the rotary engine. When the injection position is above the long axis of the cylinder, the larger the injection angle, the stronger the turbulence intensity in the cylinder. Moreover, at the moment of top dead center, at the injection position of 40 mm above the long axis, the flame propagation area with the injection angle of 40° is three times that with the injection angle of 0°. Under the operating condition of the methanol blending ratio of 20%, when the injector is at the injection position of 20 mm above the long axis with the injection angle of +40°, the in cylinder pressure peak of the rotary engine is highest, at 23.6 bar, and the rotary engine has lower HC emissions. |
| Issue: | Vol. 46 No. 1 (2025) |
| Published: | 2025-01-31 |