Effects of ammonia gas mixed into intake air on combustion and emissions characteristics in diesel engine

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K18298
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Naval and maritime engineering
• Research Institution: National Institute of Maritime, Port and Aviation Technology
• Principal Investigator: Niki Yoichi 国立研究開発法人海上・港湾・航空技術研究所, その他部局等, 研究員 (10511587)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: ディーゼル / アンモニア / 代替燃料 / デュアルフューエル / マルチゾーンモデル

Outline of Final Research Achievements

In this study, the experiments and simulation were conducted to investigate ammonia (NH3) combustion in a diesel engine.
In the experiment part, NH3 gas was mixed into intake air of the conventional diesel engine and the combustion and the exhaust emission characteristics were investigated.As the experimental results, mixed NH3 gas can burn and release heat. Water and nitrous oxide (N2O) increased and carbon dioxide decreased proportionally to the NH3 gas mixed quantity. And a diesel fuel pilot injection was able to reduce the NH3 and N2O emissions.
In the simulation part, the multi-zone diesel combustion model was modified to apply for diesel fuel combustion in lean mixture of NH3. The modified model uses a chemical kinetics simulation called Cantera for predicting combustion. The results show that the predictions of heat release and cylinder pressure agreed with experimental data by adjusting the coefficients regarding of air entrainment of diesel spray in the modified model.

Free Research Field

内燃機関