Combustion and emission characteristics investigation of a marine diesel engine powered by diesel/biodiesel/<i>n‐</i>butanol blends
Shiyong Yu, Chao Cao, Wenchao Lv
Abstract
Abstract In this paper, a three‐dimensional simulation model of the engine cylinder is established using commercial simulation software AVL‐Fire, and the accuracy of the model is verified with experimental results. The effects of diesel/biodiesel/ n‐ butanol blends on diesel engine performance, and combustion and emissions characteristics were investigated by performing simulation operations on the model. The combustion process in the cylinder was simulated for 0%, 5%, 10%, 15%, and 20% of n‐ butanol in the fuel mixture. The results showed that at 75% load, the brake thermal efficiency of D95N5, D90N10, D85N15, and D80N20 engines increased by 0.84%, 1.68%, 2.48%, and 3.19%, respectively, and soot emissions decreased by 2.76%, 5.52%, 8.25%, and 10.96%, respectively, compared with D100. However, the brake power of the engine was reduced, the brake ratio fuel consumption increased, and NO x emission increased. In addition, at all loads, soot and CO emissions decrease as the percentage of n‐ butanol in the fuel mixture increases.