CFD modelling and numerical investigation of a large marine two-stroke dual fuel direct injection engine

Research output: Contribution to journalArticlepeer-review

Abstract

This study aims at developing a CFD model for large marine two-stroke dual fuel engine with gaseous fuel direct injection at high pressure. For the gaseous fuel, the shock tube theory and the pseudo-diameter concept are employed to model the injection, jet penetration and air entrainment processes, whereas its non-premixed combustion is represented by a steady diffusion flamelet model along with a pilot fuel ignition kernel. Following this model validation, a large marine two-stroke dual fuel engine closed cycle is simulated for both the gas and diesel modes at 75% load, and the involved phenomena are comparatively assessed. The derived results demonstrate that the gas mode combustion takes place in lower maximum temperature and leaner conditions compared to the diesel mode, resulting in lower NOx emissions. This study is expected to benefit the development of future engine designs and the engine settings optimisation for reducing emissions and increasing efficiency.

Original languageEnglish
Number of pages14
JournalShips and Offshore Structures
Early online date1 Mar 2021
DOIs
Publication statusE-pub ahead of print - 1 Mar 2021

Keywords

  • CFD modelling
  • marine two-stroke dual fuel engine
  • high pressure gas injection
  • gas and diesel operating modes

Fingerprint Dive into the research topics of 'CFD modelling and numerical investigation of a large marine two-stroke dual fuel direct injection engine'. Together they form a unique fingerprint.

Cite this