場によって励起される音の研究 : 第2報, Rijke管に対する解析

概要

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For a thermoacoustic refrigerator or combustion oscillation, the secondary effect of oscillation is a ruling factor. A Rijke tube is made by the same effect and its structure is very simple. It has these characteristics : heat is released by heat conduction from a solid heat source, there is a stable flow, and it is an open system. The effects of excitation and dissipation for a Rijke tube are evaluated quantitatively. An equation of acoustic energy conservation which is a ruling equation for local area is integrated, then each term is solved. Analytic solution, transfer matrix method for vibration mode, and numerical calculation for the area around the heat source are used. There is a big density change in the area around the heat source, so the method used is adapted accordingly. A prediction of oscillation growth rate calculated by numerical simulation is compared with the experimental result. They are the same order.
一般社団法人日本機械学会の論文
1998-08-25