0
research-article

COMPARISON OF NUMERICAL COMBUSTION MODELS FOR HYDROGEN AND HYDROGEN-RICH SYNGAS APPLIED FOR DRY-LOW-NOX-MICROMIX-COMBUSTION

[+] Author and Article Information
Harald H.-W. Funke

Aachen University of Applied Sciences, Hohenstaufenallee 6, 52064 Aachen, Germany
funke@fh-aachen.de

Nils Beckmann

Aachen University of Applied Sciences, Hohenstaufenallee 6, 52064 Aachen, Germany
n.beckmann@fh-aachen.de

Jan Keinz

Aachen University of Applied Sciences, Hohenstaufenallee 6, 52064 Aachen, Germany
keinz@fh-aachen.de

Sylvester Abanteriba

Royal Melbourne Institute of Technology, 124 La Trobe Street, Melbourne, Victoria, 3000, Australia
sylvester.abanteriba@rmit.edu.au

1Corresponding author.

ASME doi:10.1115/1.4038882 History: Received October 18, 2017; Revised December 07, 2017

Abstract

The Dry-Low-NOx (DLN) Micromix combustion technology has been developed as low emission combustion principle for industrial gas turbines fueled with hydrogen or syngas. The combustion process is based on the phenomenon of jet-in-crossflow-mixing. Fuel is injected perpendicular into the air-cross-flow and burned in a multitude of miniaturized, diffusion-like flames. The miniaturization of the flames leads to a significant reduction of NOx emissions due to the short residence time of reactants in the flame. In the Micromix research approach, CFD analyses are validated towards experimental results. The combination of numerical and experimental methods allows an efficient design and optimization of DLN Micromix combustors concerning combustion stability and low NOx emissions. The paper presents a comparison of several numerical combustion models for hydrogen and hydrogen-rich syngas. They differ in the complexity of the underlying reaction mechanism and the associated computational effort. The performance of a hybrid Eddy-Break-up model with a one-step global reaction is compared to a complex chemistry model and a Flamelet Generated Manifolds model, both using detailed reaction schemes for hydrogen or syngas combustion. Validation of numerical results is based on exhaust gas compositions available from experimental investigation on DLN Micromix combustors. The conducted evaluation confirms that the applied detailed combustion mechanisms are able to predict the general physics of the DLN-Micromix combustion process accurately. The Flamelet Generated Manifolds method proved to be generally suitable to reduce the computational effort while maintaining the accuracy of detailed chemistry.

Copyright (c) 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In