ID#: 32
Abstract Title: Modeling of Natural Gas Reburning Process with Pressure Pulsations
Session Title: Poster Session I
Session Date: 7/31/01
Session Start Time: 2:50 PM
Contributing Author: Teodorczyk, A.
Organization: Warsaw University of Technology
Country: Poland
Authors: L.SzecÛwka, R.Jarnicki, A.Teodorczyk
Short Abstract: Reburning is a very complex process, containing heat and flow phenomena connected with chemical kinetics. Having in mind that many researchers underlined the role of mixing we decided to intensify mixing by introduction of pressure pulsations. Our previous experiments have confirmed the influence of generated pressure pulsations on mixing of reactants and their combustion. Further studies have revealed the influence of pulsations on emissions of NOx and CO), and other on spatial location of CH and C2 radicals in disturbed flame. These observations were used in further experiments consisted in cold and hot model tests. In the next stage the simulation model was developed of the process of reburning with pressure pulsations. The primary combustion products of fixed chemical composition from the main burner are flowing into the reburning zone, where mixing with additional reburning fuel (natural gas) occurs. Mixing process proceeds in natural way or it can be assisted by pressure pulsations. Numerical simulations were performed with the use of KIVA3V code with detailed chemistry model for natural gas combustion. The model was prepared with the use of CHEMKIN program and consists of 34 chemical species and 170 reactions. The results of this study confirmed the lowering of NO concentration in combustion products after introduction of pressure pulsations to the reburning zone. The increase of amplitude of disturbance intensifies the process of mixing of reburning fuel with primary combustion products, which results in higher reduction of NO concentration.