Abstract
Transient responses of acoustic delay lines (ADLs) were simulated on the assumptions that gas molecules in each segment of an ADL were in thermal equilibrium and that the straight-through component in the intruding gas was negligibly small. The flow rate of gas through an orifice was evaluated by using expressions of orifice conductance applicable in a wide pressure range. In order to examine the adequateness of the present method, the results of simulations were compared with several experimental data. The influence of the location of vacuum pumps and of arranging a high speed shutter at the entrance of an ADL were also simulated.
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