publication . Conference object . 2017

Numerical Simulation of Methane Slip in Dual Fuel Marine Engines

Jaehyun Han; Michael Vincent Jensen; Kar Mun Pang; Jens Honore Walther; Jesper Schramm; Choongsik Bae;
  • Published: 01 Jan 2017
  • Country: Denmark
Abstract
The methane slip is the problematic issue for the engines using natural gas(NG). Because methane is more powerful greenhouse gas (GHG) than CO2, understanding of the methane slip during gas exchange process of the engines is essential. In this study, the influence of the gas pipe geometry and the valve timings on the methane slip was investigated. MAN L28/32DF engine was modeled to simulate the gas exchange process of the four stroke NG-diesel dual fuel engines. The mesh size of the model was decided based on the sensitivity study on the peak pressure of the cylinder and the fuel mass estimations. The simulations with various gas pipe geometries were conducted. ...
Subjects
free text keywords: Methane Slip, CFD, 4 Stroke dual fuel marine engine, Natural gas, Gas pipe optimization, Valve timing, Un-burned methane emission
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