A Study of Injection Directions on Improvement of Engine Performance and NOx Emission in A Low-speed Marine Engine 2019-01-2322
A computational fluid dynamics (CFD) simulation model for a two-stroke low-speed marine engine has been established in CONVERGE software, to study the impact of different injection directions on fuel consumption and emissions of the engine. The goal of this research was to investigate injection angles in horizontal and vertical directions respectively. According to the simulation results, “trade-off” relationship was found in both directions between fuel consumption and NOx emission. Based on these results, 8° and -16° were considered as optimal injection angles in horizontal and vertical directions. With the optimized injection angles, lower NOx emission can be achieved with a little penalty on fuel consumption.
Citation: Sun, Q., Ji, W., Huang, Z., and Zhu*, L., "A Study of Injection Directions on Improvement of Engine Performance and NOx Emission in A Low-speed Marine Engine," SAE Technical Paper 2019-01-2322, 2019. Download Citation
Qian Sun, Wenxia Ji, Zhen Huang, Lei Zhu*
Key Laboratory for Power Machinery and Engineering of M.O.E,
2019 JSAE/SAE Powertrains, Fuels and Lubricants