A Study on AFH

概要

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The subject of this paper is to make clear the basic characteristics of the AFH. To calculate the characteristics of the AFH with single conduit, the AFH containing a separator and the three-phase AFH, three matrices, namely exact matrix, approximated matrix using the Poiseuille's law and matrix approximated by lumped parameters, are considered. When the input frequency of the AFH is lower than the fundamental characteristic frequency of the conduit, the calculations based upon the approximated matrices induce no important error. The frictional force on the separator caused by the sealing material lowers remarkably the power transmission efficiency of the AFH. With the three-phase AFH, the pressure variation does not become sinusoidal even if the displacement of the input pistons is sinusoidal. In this case a high input frequency can not be taken because some resonance will be induced in the system by a higher harmonics in the pressure wave.
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