Numerical Evaluation of the Flow and Emission Characteristics in a Can-Combustor with Excess-Air Ratios

摘要

The main focus for the development of low emission combustor is to minimize the harmful emissions to atmosphere. In order to belittle the emissions, stable combustion conditions are required to completely burn a given amount of fuel. To evaluate this problem, two staged combustion is adopted to suppress the emission in the combustor by the provision of excess air for pollution free environment. Gas turbine combustor incorporates a modest amount of 5 to 10% excess air to burn the natural gas-fuel completely. In this work, the effect of excess air ratios on combustion gas temperature and emission characteristics of a gas turbine have been investigated. The main objective of this problem lies in preventing harmful emissions for high performance combustor without affecting the turbine performance.