抄録
We have frequently experienced a large amplitude vibration of floats of a float-area-type flow meter, Through, elements generating an unsteady flow have not been installed through pipelines when employing gases as working fluids. This kind of instability has been considered to be most dangerous when using the float-area-type meters. In order to clarify factors influencing this kind of float instability of the float-area-type flow meters, a theoretical study is performed in this paper by adopting a simple model which consists of a float-area-type flow meter and a circular pipe installed upstream. The theoretical results are verified by experiments of self-excited vibration of the float, which are carried out by varying the length of the circular pipe and air as the working fluid. Good agreement is ascertained between the theoretical and the experimental results.
