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Show POTENTIALITY OF VISUALIZATION FOR STUDIES OR FLAMES AID FURBACES T. Hirano, S. Ishizuka, and T. Tsuruda The University of Tokyo and R. Tanaka, T. Hasegawa, and S. Mochida Nippon Furnace Kogyo Kaisha, Ltd. Abstract PAPER NO.8 This paper presents the resul ts of research into the potentiali ty of visualization for studies on flames and furnaces. A brief description of the visualization techniques used in previous studies on flames and furnaces is made, and examples of visualization and facts derived from them are shown. It is pointed out that a number of findings indispensable for understanding the characteristics of flames and furnaces have been made using visualization techniques. Finally, the possibility of further development and improvement of visualization techniques is discussed. Introduction For controlling emissions from combustion processes without reduction of combustion efficiency, knowledge of combustion phenomena is indispensable. The most effective means to accumulate knowledge of combustion phenomena in the gas phase would be observation of flames and surrounding flow fields. Obviously, the information that can be obtained by observation increases adopting appropriate visualization techniques. Indeed, a number of important data have been obtained using visualization techniques[1-6]. A good example is of the burning velocity which is a basic property of combustion. Most methods to determine the burning velocity, including the cone-angle method, Gouy's flame-area method, particle-track method, flat-flame method, soap-bubble method, spherical-bomb method, and double kernel method, are based on visualization[ 1-8]. Many other examples can be found in previous studies and have been summarized in text books[1-6]. These examples imply that the improvement, development, or invention of visualization techniques increases possibility to find out novel facts and to accumulate data to be needed for understanding combustion phenomena to a further extent. To elucidate the potentiality of visualization must be the first step for the improvement, development, or invention of visualization techniques, and it seems meaningful for future studies on combustion processes in flames and furnaces. Characteristics of Visualization Techniques Combustion phenomena in the gas phase can be characterized by flame behavior which depends on the chemical reaction process in the reaction zone and the |
