Abstract
Areview of the previous combustion works was carried out to find out the most appropriate scaling law for the combustion furnace. First, various characteristics of the combustion furnace were clasified into five categories, namely, Transfer, Pattern, Performance, Emission and Stability . The factors influencing each characteristic were examined and summarized in a diagram . The following seven factors were extracted as the basic factors . These are Geometrical configuration, Reynolds number, Mixing time, Residence time, Reaction time, Air ratio and Preheating temperature. Depending on which factor should be kept constant for scaling, the three different scaling laws were considered . These are the scaling laws of Reynolds number=constant, Residence time=constant and Velocity=constant . The advantages and disadvantages of each scaling were discussed and examples of applying these laws to the practical burner design were illustrated . It was suggested that the scaling law of Residence time=constant can be applied widely compared to other scaling law.
Finally, the research subjects which were required to build the reliable scaling theory were proposed.
