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The NOx Emission Prediction In Diesel Exhaust For Large Bore Marine Engines

Borkowski T.

Journal of Polish CIMAC

2007

Vol. 2, no 1

85-92

The general IMO procedure was adopted with the main aim to achieve compliant engine performance with current environmental legislation. The paper investigates possibility of multi-zone diesel combustion model use to estimate NOx emission. The model calculation results are compared with the experimental data obtained for marine diesel engine - Sulzer A20/24. An experimental study is conducted to investigate the use of phenomenological multizone model to predict NOx emission, based on marine diesel engine operation parameters. The predicted and experimental results comparison shows reasonable agreement only within high engine loads, while serious discrepancies were found in low range operating effective power.

Computational modeling of nitric oxide formation in biomass combustion

Weydahl T., Bugge M., Gran I. R., Ertesvag I. S.

International Journal of Applied Mechanics and Engineering

2002

Vol. 7, no 1

125-141

Nitric-oxide formation from fuel-bound nitrogen in turbulent non-premixed flames was investigated. The calculations were performed using the k - e model for turbulence and the Eddy Dissipation Concept for turbulent combustion in conjunction with detailed chemistry of the chemical reaction mechanism GRI-Mech 2.11. Comparison with experimental data from the literature showed that the discrepancies for integrated values were negligible, whereas the spreading of the radial profiles for nitric oxide was inaccurate. Furthermore, to illustrate the potential of the model, preliminary simulations of a wood stove