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Natural Gas as a Fuel for Dual-Fuel Automotive Engines. A Review

Kowalewicz A., Wojtyniak M.

Archivum Combustionis

2009

Vol. 29 nr 1-2

38-72

General information on natural gas properties, reserves, production and distribution is given. Application of natural gas to automotive vehicles and comparison with other gases as well as its application to spark ignition and compression ignition engines are discussed. As far as natural gas application to dual fuel engines is concerned, the influence of engine operating parameters (bmep, speed), control parameters (pilot diesel fuel quantity and timing, fuel-air equivalence ratio) and engine design (combustion chamber shape, supercharging) on efficiency, emissions, noise and cycle-to-cycle variations are discussed. Benefits of natural gas as a fuel for dual-fuel engines suggest its recommendation for automotive vehicles.

Modelling of the gas combustion process

Baczyńska T., Głowiński J., Hałat A.

Polish Journal of Chemical Technology

2008

Vol. 10, nr 1

15-18

This paper reports on a procedure which leads to the assessment of the K(G) values without the need of determining the maximal rate of pressure rise by experiments. A simulation is proposed of the combustion process in its simplest form, i.e. one-dimensional propagation of the flame. Such simulation enables the burning velocity S(u) to be assessed. Knowing the S(u) values for different compositions of the flammable mixture makes it possible to determine the S(u,max) value. Once the correlation between S(u,max) and K(G) has been established, this will enable us to assign an appropriate value of K(G) to that of the maximal burning velocity. An example of such a correlation is given. It refers to flammable mixtures of a comparatively low burning velocity.