The Open Fuels & Energy Science Journal

2015, 8 : 1-13
Published online 2015 January 22. DOI: 10.2174/1876973X01508010001
Publisher ID: TOEFJ-8-1

Numerical Investigation on the Flow, Combustion and NO Emission Characteristics in a 10 MW Premixed Gas Burner

Weibo Chen and Guixiong Liu
School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou, China.

ABSTRACT

The characteristics of the combustion temperature, flow velocity, CO distribution and NOx emissions of a 10 MW gas burner at different primary to secondary air ratios are numerically studied using computational fluid dynamics software Fluent. The results indicate that the primary to secondary air ratio in gas burner determines the combustion quality through influencing some parameters directly, such as the combustion efficiency, combustion intensity, profile and stability of flame as well as emission of NOx. Then two evaluation indexes of combustion quality are summarized after analyzing the flame structure and characteristics of the flow. The detailed results reported in this paper may provide a useful basis for NOx reduction and premixed gas burner design. Finally some proposals are given to choose the optimal primary to secondary air ratio for a gas burner.

Keywords:

Combustion, computational fluid dynamics, energy, numerical simulation.