Effects of biodiesel ratio and nozzle diameter on combustion and emissions of a biodiesel–DME-fueled engine

Author:

Hou Junxing1ORCID,Xi Shuanghui1,Wang Zhenghe1,Li Shuhao2

Affiliation:

1. School of Aerospace Engineering, Zhengzhou University of Aeronautics, Zhengzhou 450046, China

2. School of Aero Engine, Zhengzhou University of Aeronautics, Zhengzhou 450046, China

Abstract

This paper compares the combustion behavior and emission of a turbocharged compression ignition engine fueled with biodiesel BD100, dimethyl ether DME100, low-proportioned biodiesel blends BD30, and medium-proportioned biodiesel blends BD50. The impacts of biodiesel ratio and nozzle diameter on combustion and emissions characteristics were determined. The findings show that BD100 with a nozzle 6 × 0.24 mm has the highest value of maximum pressure, maximum pressure rise rate, maximum heat release rate, and NOx emissions. DME100 with a nozzle of 6 × 0.40 mm has the lowest values. CO emissions and HC emissions of BD100 with a nozzle 6 × 0.24 mm and DME100 with nozzles 6 × 0.40 mm and 6 × 0.35 mm gradually decrease. Among biodiesel blends, BD30 and BD50 with two types of nozzles, BD30 with a nozzle 6 × 0.40 mm has the lowest value of maximum pressure, maximum pressure rise rate, NOx emissions, and soot emissions. Compared with BD50, BD30 with nozzles 6 × 0.35 mm and 6 × 0.40 mm has lower CO emissions, HC emissions, and smoke emissions.

Publisher

Canadian Science Publishing

Subject

Mechanical Engineering

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