NUMERICAL STUDY OF SWIRLER AND VANE EFFECT ON NOX EMMISION IN PREMIX COMBUSTION

• Main Author: PURWO KRISNANTO (NIM : 13105029); Pembimbing : Dr. Ir. Willy Adriansyah, WAHYU
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/17525
• Institution: Institut Teknologi Bandung

Acid rain is a natural phenomenon which is very detrimental to human life. In addition to the deadly variety of living things can also cause various types of metal rusting. Acid rain caused by nitrogen oxides, which are highly toxic compounds dissolved in rain water in the form of nitric acid (H2NO3). Combustion is a human activity that have the biggest contribution to emissions of nitrogen oxides (NOx), so that necessary to assessment model combustion system which produces a minimum NOx emissions. <br /> <br /> <br /> This final project aimed to examine the combustion system model and design the burner of combustion system which can produce NOx emissions from burning the least amount possible with the help of Computational Fluid Dynamics software (CFD) FLUENT 6.3.2. Some of the techniques used in the combustion process to produce a minimum NOx emissions, such us: (1) mixing fuel and air before it enters the combustion zone (premix combustion); (2) lowering the average temperature in the combustion zone ; (3) recirculate flow of air and fuel mixture in the combustion zone ; (4) build a fire in a floating condition (lift-off). From some of the techniques above, so in this final project was undertaken design combustion system and burner and then simulating it on CFD to see the process of combustion, fire model, and NOx emissions generated in the simulation. After the burner and combustion system design from simulation is gotten, manufacture and testing is carried out to see the model flame burner that formed on actual conditions. The results of this final project is the combustion system which has amounted to 1.08 ppm NOx emissions, combustor design has a 12 vane swirler, vane opening angle 30 &#61616;, and swirl the axial length of 2 cm with the physical characteristics of fire combustion products:(1) have good stability with output temperature 1426 K ; (2) flame lift-off condition is reached ; (3) experiencing round the fire profile due to the influence of the swirl effect.