DefinePK

Abstract

Low energy use to produce high power technique is demanding by many industries in order to achieve the economical expenses. Cost and energy still a problematic area for the burner combustion by many industries in the world. Besides, combustion process is a main key point for the performance of burner. Well mixture formation for a spray could achieve the wonderful combustion during the burning process. The main purpose of this research is to investigate the performance of turbulence generators (swirler and fractal grids) to the spray characteristics while related to the prediction of combustion process. The studied parameters include equivalent ratio from lean, stoichiometric and rich, in diesel-air mixture formation and spray characteristics such as spray penetration length, spray angle and spray area. The spray images of different equivalence ratio are taken by the direct photography method with a digital camera. The real spray images with the time changes was analyzed by the image processing technique and the swirler and two types of fractal grids (fractal regular grid and fractal grid) are taken into account of comparison with the based diesel fuel. The result showed that the swirler can easily control the penetration length of the spray from preventing contact to the wall of combustor chamber and it is predicted that the combustion will be more complete due to its short primary spray breakup and reduce the emission produce. Nevertheless, fractal grids have been proven that generated high turbulence intensity with increased the spray penetration length and spray area in this experiment and it is predicted to produce high burning velocity than swirler during the combustion process. Application of fractal grid in burner system could produce high power of combustion with lower energy used. However, the emission produced predicted will be slightly higher.