熱音響音波発生機の性能に及ぼすスタック位置の影響(熱工学,内燃機関,動力など)

概要

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The influence of stack position on the performance of thermoacoustic sound wave generators is examined. Two types of experiments are performed for various values of sound wave frequency f of 66, 74, 100, 125 and 134 Hz. When a sound wave generator is independently operated, regardless of f, a maximum amount of heat is transferred by sound waves when the stack is at 30-40% of the resonance tube length, L, from the closed end, and the highest pressure amplitude is obtained when the stack position is approximately 20% of L. The third harmonic is generated when the resonance tube is long and the stack is positioned at 10% of L. When two sound wave generators are connected to each other at the closed ends, the transferred heat values are different, but their distributions are symmetrical. The lowest temperature of the hot heat exchanger, T_H, is lower than that of an independently operated generator. The difference between the lowest T_H values changes from 40℃ to 70℃. Maximum pressure amplitude at the central region is confirmed when the stacks are positioned symmetrically. Both pressure and velocity waveforms at each point of the resonance tube showed tendencies similar to those of an independently operated generator.
一般社団法人日本機械学会の論文
2002-11-25