Natural Gas Combustion Modelling

Natural Gas Combustion Modelling Popular

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NG Burner Model Ver 1.6.zip

Natural Gas Combustion Modelling

Updated for Flownex 8.8 and later

Please note that the original natural gas combustion model (ver 1.5) will no longer work with Flownex 8.8 and later. Therefore the model has been updated to version 1.6, please download this update.

The Flownex┬« Adiabatic Flame model is based on the NASA Glenn Chemical Equilibrium Program CEA2 and supports a large range of fuels. The development of the natural gas combustion model has only attempted to implement a combustion model for typical natural gas compositions. It would be easy to add capabilities for other fuel components, whether gaseous or liquid.

The development of this model essentially comprised of three basic fields of development; firstly, some effort went into defining fluid tables for the selected natural gas components in such a way that accurate interpolation would result at low partial pressures and at temperatures exceeding those expected during combustion. Secondly, a suite of compound components were developed to assist with the convenient specification and analysis of the gas components. Thirdly, a Simple Burner model was developed by wrapping the Flownex Adiabatic Flame model in a compound component together with a script to enable the specification and calculation of typical natural gas burner performance parameters. 

Flownex deals with combustion gas mixtures via the specification of the mixture mass fractions at the boundaries. Similarly, the combusted flue gas may be analysed at any node downstream of the Adiabatic Flame model. As gas compositions are commonly specified in mol fractions rather than mass fractions, a suit of 5 scripts, each wrapped in a compound component for convenience has been developed. These serve as inputs and outputs of information to and from the Burner compound component. 

The full case study discussion document is available on the Flownex® web page in the Case Studies section: