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A gaseous direct injector for methane has been developed for use in a dual-fuel methane/diesel medium speed marine engine. Using medium pressure direct injection (MPDI) instead of port fuel injection (PFI) offers a high potential for the minimisation of methane slip while improving efficiency and power density at lower cost than high pressure direct injection. Analysis using three dimensional computational fluid dynamics (3D – CFD) simulation was carried out in order to better understand the mixture formation process within the cylinder, as knowledge of the interaction of gas jet and air within the cylinder is crucial to designing a successful combustion regime. Engine operation with a direct injector is compared with the behaviour of the engine using a port fuel SOGAV injector (PFI). Different operating scenarios using MPDI are shown, covering homogenous and inhomogeneous operation in addition to a stratified charge approach, analysed using 3D – CFD and experimental approaches on the 1/34 DF medium speed single cylinder research engine.

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Numerical Analysis of a Medium Pressure Gaseous Direct Injector on a Marine Medium Speed Dual-Fuel Engine

  • 会议论文

  • 发表日期：

    2025年

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  • Jules Christopher Dinwoodie,
  • Sebastian Cepelak,
  • Manuel Glauner,
  • Pascal Seipel,
  • Karsten Schleef,
  • Bert Buchholz,
  • Martin Theile

摘要

A gaseous direct injector for methane has been developed for use in a dual-fuel methane/diesel medium speed marine engine. Using medium pressure direct injection (MPDI) instead of port fuel injection (PFI) offers a high potential for the minimisation of methane slip while improving efficiency and power density at lower cost than high pressure direct injection. Analysis using three dimensional computational fluid dynamics (3D – CFD) simulation was carried out in order to better understand the mixture formation process within the cylinder, as knowledge of the interaction of gas jet and air within the cylinder is crucial to designing a successful combustion regime. Engine operation with a direct injector is compared with the behaviour of the engine using a port fuel SOGAV injector (PFI). Different operating scenarios using MPDI are shown, covering homogenous and inhomogeneous operation in addition to a stratified charge approach, analysed using 3D – CFD and experimental approaches on the 1/34 DF medium speed single cylinder research engine.