8. Further technological optimizations

In addition to the above choices, satisfactory performance also depends on a number of precautions: minimizing all causes of loss.

Reducing viscous losses: the first point in obtaining sufficient performance from a thermoacoustic machine is to reduce the acoustic impedance $\frac{p_{r}}{{\bar{u}}_{r}} = {\bar{ρ}}_{g} c$ of the regenerative stack, otherwise excessive speeds will generate prohibitive viscous losses. For example, when using standing...

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Further technological optimizations

Bibliography

(1) - SWIFT (G.W.) - Thermoacoustics : a unifying perspective for some engines and refrigerators. - Fifth draft LA UR 99 895, 29 mai 2001.
(2) - SWIFT (G.W.) - Thermoacoustic engines. - J. Acoust....