A07 再生器の蓄熱材構造によるエンジン出力の相違(構成要素機器の基本特性並びに機器性能との関連(3))

抄録

To reveal which is more suitable, smooth channel or metal gauze for the regenerator material, experimental study was conducted. To compare structures with the different dependencies of length scale and flow velocity both on flow resistance and heat transfer, we first looked for the condition where pressure drop along the regenerator is the same using a single smooth channel and metal gauze with three mesh size. We found that pressure drop for smooth channel is the same as that for #30 metal gauze at reciprocal frequency f=6.3Hz and #16 gauze at f=31.5Hz. We measured, indicated work and shaft work. Since there is a possibility that indicated work contains larger error due to the determination of phase, the shaft work for source temperature of 600℃ was used to draw the conclusion. The conclusion is that smooth channel is better structure of regenerator than metal gauze.