Computer Modelling and Experimental Investigation of a Lean Burn Natural Gas Engine University of Bath UK

Format:

Conference/Event

Author/Creator:

Charlton, S. J., author.

Conference Name:

International Congress & Exposition (1990-02-26 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1990

Summary:

AbstractA single cylinder research engine has been installed at Bath University for investigation of a stratified charge combustion system for a natural gas engine. The engine has simulated turbocharging and a compressed mains natural gas supply. A relatively complex fuelling system has been developed to enable independent control and measurement of air-fuel ratio to each of the engine's combustion chambers. Results indicate that the emission of oxides of nitrogen may be reduced to very low levels (1-2g/kWh) compared with conventional stoichiometric gas engines (10-2Og/kWh). It has been found that the operation of the prechamber can influence the level of exhaust emission and the cyclic dispersion. Optimum performance is achieved within a relatively narrow range of prechamber supply air:gas ratio from 3:1 to 8:1 by mass.A multi-dimensional fluid dynamic model of the prechamber was developed and used to study the in-prechamber flow structure and mixing processes. The experimental finding on optimum air-gas ratio for the prechamber was supported by the computational study which showed that a pure gas charge leads to an over-rich and highly inhomogeneous mixture at the point of ignition

Notes:

Vendor supplied data

Publisher Number:

900228

Access Restriction:

Restricted for use by site license