Title: Calculation of the flow of a Viessmann RotriX swirl burner to assess the recirculation behaviour and the potential for NO_x reduction

Authors: Volker Pawlik, Werner Klausmann

Addresses: Viessmann Werke GmbH, R&D Department, Viessmannstrasse 1, D-35107 Allendorf/Eder, Germany. Viessmann Werke GmbH, R&D Department, Viessmannstrasse 1, D-35107 Allendorf/Eder, Germany

Abstract: Increasing importance is being attached to the reduction of nitrogen oxides in the combustion of liquid fuels. The recirculation rate of the flue gases plays a vital part in this. Measurements as well as numerical calculations were carried out with the aim of predicting recirculation behaviour. This paper presents the isothermal numerical calculation of the flow field produced by a Viessmann RotriX swirl burner. For the purposes of the calculation, use was made both of different discretization methods (first and second order) and turbulence models (RNG-k-ε, RSM). In some cases, the calculation results were validated by measurements.

Keywords: swirling flow; burner; nitrogen oxide (NO_x-)reduction; CFD; fluegas recirculation; heating technology.

DOI: 10.1504/PCFD.2001.001477

Progress in Computational Fluid Dynamics, An International Journal, 2001 Vol.1 No.1/2/3, pp.131-140

Published online: 04 Jul 2003 *

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