突合わせ形熱音響波発生機の特徴 : 流体工学 , 流体機械

概要

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New types of thermoacoustic sound wave generators, which play an important role in the thermoacoustic refrigerator, are developed. The thermoacoustic sound wave generator consists of hot and cold heat exchangers, stack and resonance tube which is made of stainless steel and Plexiglas tubes, 32 mm in inner diameter and 860 mm long. The theoretical sound wave frequency is 100 Hz. First, two sound wave generators are connected with each other either at the open ends or the closed ends. When they are connected at their open ends, their velocity, pressure amplitude and heat transfer are considerably improved compared with those of independently operated ones. Each phase of both velocity and pressure is inverted automatically. However, when they are connected at their closed ends, their velocity, pressure amplitude and heat transfer are almost equal to those of independently operated ones, and each phase is synchronized automatically. Second, a loop-type sound wave generator constructed of four sound wave generators and four bent tubes is developed. Its sufficient performance is also confirmed.
一般社団法人日本機械学会の論文
2001-03-25