C13 熱音響音波発生機の振動流れ : 共鳴管内およびスタック内で流体のなす仕事(パルス管冷凍機,熱音響機器及び関連要素と応用システム(4))

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  • C13 Oscillatory Flow of Thermoacoustic Sound Wave Generator : Fluid Work in Resonance Tube and Stack
  • 熱音響音波発生機の振動流れ(共鳴管内およびスタック内で流体のなす仕事)
  • ネツ オンキョウ オンパ ハッセイキ ノ シンドウ ナガレ(キョウメイカン ナイ オヨビ スタック ナイ デ リュウタイ ノ ナス シゴト)

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Tow types of thermoacoustic sound-wave generator are employed. One is a conventional thermoacoustic sound-wave generator, 32 mm in inner diameter and 860 mm long, including high- and low- temperature exchangers inside the resonance tube. The other is a simplified thermoacoustic sound-wave generator, 72 mm in inner diameter and 860 mm long, and has no heat exchangers inside the resonance tube. The calculation software, Mathematica, was employed for simulating the oscillatory flow and the fluid work both in the resonance tube and in the stack. Maximum energy conversion efficiency of 6.5% from heat to fluid work inside the resonance tube is performed at medium position of the resonance tube, on condition that the oscillatory frequency f is 100Hz, and thermal input Q is 400W. In addition, optimum shape and size of stack are discussed with hydraulic diameter.

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