A Review of Marine Dual-Fuel Engine New Combustion Technology: Turbulent Jet-Controlled Premixed-Diffusion Multi-Mode Combustion

Jianlin Cao, Zebang Liu, Hao Shi (), Dongsheng Dong (), Shuping Kang and Lingxu Bu
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Jianlin Cao: Marine Engineering College, Dalian Maritime University, Dalian 116026, China
Zebang Liu: School of Engineering, Cardiff University, Queen’s Building, Cardiff CF24 3AA, UK
Hao Shi: Department of Mechanical Engineering, Reactive Flows and Diagnostics, Technical University of Darmstadt, Otto-Berndt-Straße 3, 64287 Darmstadt, Germany
Dongsheng Dong: School of Naval Architecture, Ocean and Energy Power Engineering, Wuhan University of Technology, Wuhan 430000, China
Shuping Kang: School of Engineering, Cardiff University, Queen’s Building, Cardiff CF24 3AA, UK
Lingxu Bu: Marine Engineering College, Dalian Maritime University, Dalian 116026, China

Energies, 2025, vol. 18, issue 15, 1-26

Abstract: Driven by stringent emission regulations, advanced combustion modes utilizing turbulent jet ignition technology are pivotal for enhancing the performance of marine low-speed natural gas dual-fuel engines. This review focuses on three novel combustion modes, yielding key conclusions: (1) Compared to the conventional DJCDC mode, the TJCDC mode exhibits a significantly higher swirl ratio and turbulence kinetic energy in the main chamber during initial combustion. This promotes natural gas jet development and combustion acceleration, leading to shorter ignition delay, reduced combustion duration, and a combustion center (CA50) positioned closer to the Top Dead Center (TDC), alongside higher peak cylinder pressure and a faster early heat release rate. Energetically, while TJCDC incurs higher heat transfer losses, it benefits from lower exhaust energy and irreversible exergy loss, indicating greater potential for useful work extraction, albeit with slightly higher indicated specific NOx emissions. (2) In the high-compression ratio TJCPC mode, the Liquid Pressurized Natural Gas (LPNG) injection parameters critically impact performance. Delaying the start of injection (SOI) or extending the injection duration degrades premixing uniformity and increases unburned methane (CH 4 ) slip, with the duration effects showing a load dependency. Optimizing both the injection timing and duration is, therefore, essential for emission control. (3) Increasing the excess air ratio delays the combustion phasing in TJCPC (longer ignition delay, extended combustion duration, and retarded CA50). However, this shift positions the heat release more optimally relative to the TDC, resulting in significantly improved indicated thermal efficiency. This work provides a theoretical foundation for optimizing high-efficiency, low-emission combustion strategies in marine dual-fuel engines.

Keywords: turbulent jet ignition; marine dual-fuel engine; turbulent jet-controlled diffusion combustion; high efficiency; low emission; advanced combustion mode; diesel jet-controlled diffusion combustion (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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