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Article

Modelling of a Bluff-Body Stabilised Premixed Flames Close to Blow-Off

1
Department of Mechanical and Marine Engineering, Western Norway University of Applied Sciences (HVL), N5020 Bergen, Norway
2
School of Mechanical Engineering, Universiti Teknologi Malaysia (UTM), Skudai 81310, Malaysia
*
Author to whom correspondence should be addressed.
Academic Editor: Dimitris Drikakis
Received: 19 February 2021 / Revised: 25 March 2021 / Accepted: 26 March 2021 / Published: 30 March 2021
(This article belongs to the Section Computational Engineering)
As emission legislation becomes more stringent, the modelling of turbulent lean premixed combustion is becoming an essential tool for designing efficient and environmentally friendly combustion systems. However, to predict emissions, reliable predictive models are required. Among the promising methods capable of predicting pollutant emissions with a long chemical time scale, such as nitrogen oxides (NOx), is conditional moment closure (CMC). However, the practical application of this method to turbulent premixed flames depends on the precision of the conditional scalar dissipation rate,ζ Nc|ζ, model. In this study, an alternative closure for this term is implemented in the RANS-CMC method. The method is validated against the velocity, temperature, and gas composition measurements of lean premixed flames close to blow-off, within the limit of computational fluid dynamic (CFD) capability. Acceptable agreement is achieved between the predicted and measured values near the burner, with an average error of 15%. The model reproduces the flame characteristics; some discrepancies are found within the recirculation region due to significant turbulence intensity. View Full-Text
Keywords: lean; premixed; CMC; pollutants; conditional scalar dissipation rate lean; premixed; CMC; pollutants; conditional scalar dissipation rate
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MDPI and ACS Style

Amzin, S.; Mohd Yasin, M.F. Modelling of a Bluff-Body Stabilised Premixed Flames Close to Blow-Off. Computation 2021, 9, 43. https://0-doi-org.brum.beds.ac.uk/10.3390/computation9040043

AMA Style

Amzin S, Mohd Yasin MF. Modelling of a Bluff-Body Stabilised Premixed Flames Close to Blow-Off. Computation. 2021; 9(4):43. https://0-doi-org.brum.beds.ac.uk/10.3390/computation9040043

Chicago/Turabian Style

Amzin, Shokri, and Mohd F. Mohd Yasin. 2021. "Modelling of a Bluff-Body Stabilised Premixed Flames Close to Blow-Off" Computation 9, no. 4: 43. https://0-doi-org.brum.beds.ac.uk/10.3390/computation9040043

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