Optimizing injection strategies for improved combustion performance in turbulence jet ignition rotary engines

Baowei Fan, Siquan Huo, Jianfeng Pan, Wenming Yang, Wei Li, Yingxin Wu, Qingbo Lu and Chao Jiang

Energy, 2024, vol. 313, issue C

Abstract: Methanol gasoline fuel blends is considered one of the novel alternative fuels for improving the thermal efficiency and atomization of the rotary engine. In order to further study the combustion performance of the methanol gasoline fuel blends rotary engine, an experimental test bench and numerical simulation model were established. On this basis, the in-cylinder flow and combustion performance of rotary engines with various injection strategies were investigated. The results indicated that increasing the nozzle diameter and decreasing the spray cone angle both resulted in the forward movement of the high-concentration fuel zone. To be specific, when the high-concentration fuel zone was concentrated in the middle of the cylinder and around the pre-chamber orifice, it facilitated the formation of a large-scale vortex. This vortex was beneficial for flame propagation, thereby enabling the attainment of maximum indicated thermal efficiency. Compared with the other injector parameters, adopting the 0.22 mm nozzle diameter and a 15° spray cone angle were conducive to improving the combustion speed and the indicated thermal efficiency. This improvement was attributed to enhanced fuel distribution and flow field, highlighting the contribution of injection strategies and turbulence jet ignition.

Keywords: Rotary engine; Turbulence jet ignition; Spray cone angle; Nozzle diameter; Direct injection (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:313:y:2024:i:c:s0360544224038039

DOI: 10.1016/j.energy.2024.134025

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