EXPERIMENTAL STUDIES IN PULSE FLAMES: OPTIMIZATION OF AN ELETRODYNAMIC TRANSDUCER

The combustion, since the beginning of history of mankind, is the source of heat and work more used in an effective and reliable manner for energy conversion. The restrictions of the use of fossil fuels and growing concerns about the emission of pollutants in the atmosphere have generated a major breakthrough in researches in combustion processes improvement in recent decades. Pulsating Combustion has shown an interesting tool in the improvement of power generation, offering advantages over conventional combustion process due to a higher rate of mixing between the fuel and oxidant, increasing the turbulence in the region of flame, which generates a more efficient combustion and thus a reduction in the amount of fuel used. In this work will be presented the methodology of an experimental study of sizing an electrodynamic transducer for optimization of a baffle through the parameters suggested by ThilleSmal to reduce effectively the emissions of partial oxidation pollutant gases and particulates, increasing the convective heat transfer in the burner and lower capital investment for this process, when compared to the conventional ones. Therefore in the present work, the following steps were taken: a) the Thiele -Smal parameters for the electrodynamic transducer has been used; b) study of baffle assisted by analysis instruments and acoustic correction through RTA RTA technique (real time analyzer); c) use of pink signal generators and computational methods for simulation. After the steps previously presented, a scanning has been performed in the data in order to find the resonant frequency of the burner (natural frequency) which was used as a reference to tune the burner accordingly, the electrodynamic transducer and baffle. Through research has been observed that the electrodynamic transducer optimization for use in studies of pulsed flames favored the baffle design that got attuned to the natural frequency of the burner, providing greater efficiency of mixing fuel-oxygen in the air, increasing the heat exchange, that is the speed of heating has significantly increased by using a less cost implementation.