Abstract
In the previous papers, a simulation method for fluid line systems was investigated based upon their block diagram representation for four terminal networks. In the application of this type of simulation, severe numerical instability problem often results. This problem is due to an algebraic loop in the block diagram. The loop is observed when the up- and down-stream end of the pipe-line is connected with, for example, a control valve and load, respectively. In this study, a method to avoid such an instability, without losing accuracy in calculation, is developed. A simulation is made by adopting the developed method. The calculated response curves are compared with the measured ones to show the validity of the method.
