Abstract
An empirical equation is addressed for evaluating the oscillatory-flow resistance of regenerators consisting of stacked mesh screens. The empirical equation is expressed by a linear function of velocity amplitude and parameterized by acoustic Reynolds number Re_h and ωτ_v (ωis the angular frequency of acoustic wave, and τ_v is the viscous relaxation time given by effective pore radius). In the absence of axial temperature difference, the flow resistance of regenerator is determined from measurements of the acoustic field at ends of the regenerator. The measured resistance per unit length of the regenerator is compared to the prediction of the empirical equation. Through the experiments with air at atmospheric pressure, helium and argon gases with mean pressure of 0.45 MPa, the maximum deviation of the empirical equation is found to be 6 percent.
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