Analysis of Water Injection and Improvement of Turbulent Flows in Split Cycle Engine Compressor
SAE-PP-00213
12/29/2021
- Content
- The split cycle engine could be the next breakthrough for internal combustion (IC) engines achieving up to 60% thermal efficiency and having near to zero harmful emissions. This engine could challenge EV, fuel cell and hydrogen technologies. Water injection has been used to improve compression efficiency by the University of Brighton, showing that it is an effective way of reducing compression work. This study looks at three design solutions to improve air-water mixing and control the flow entering the compression chamber, to minimise compression work. Air and water temperature are investigated with a mathematical model, to understand their impact on compression work. The results from this study, although being relatively imprecise, show correlations between visual, experimental and CFD results, presenting a simpler design solution to the conventional direct injection. The results from the mathematical model show that air temperature does not affect considerably compression efficiency, and injected water has a negative effect on compression for temperatures higher than 60°C.
- Citation
- Borgia, F., "Analysis of Water Injection and Improvement of Turbulent Flows in Split Cycle Engine Compressor," SAE MobilityRxiv™ Preprint, submitted December 29, 2021, https://doi.org/10.47953/SAE-PP-00213.