Abstract
The heat transfer in the industrial furnaces is conducted mainly by radiation and convection. But so far in the industrial furnaces particularly in the oil fueled and electiricaly heated furnaces radiative heat transfer mostly prevails. For the purpose of realizing more efficient heating it is necessary to make effective use of con-vective heat transfer. High speed burner which have ability to effuse high temperature combustion product at high speed has been developed. The high speed burner supplies not only heat but also mechanical energy in the form of jet gas stream into the furnace. This jet stream causes violent recirculative flow of hot gases, which is of great use to obtain rapid heating, uniform heating, thermal efficiency improvement and so on. Fundamental structure of the high speed burner, hydrodynamic characteristics of high speed hot gas stream are briefly described and the results of actual applications are also refered to.
