Abstract
In the 1st report, hydrodynamic analysis on the flow around a float and an inner wall of tapered tube was developed by assuming that the taper was small, and relations which can be applied to gas and liquid, were introduced. In the 2nd report, the relations obtained theoretically in the 1st report, were verified through experiments.
The purpose of the 3rd report is to introduce general relations about performance of floatarea-type flow meters which are applied when the taper of a tube is not small. The method to calculate the relation between a position of float and a flow rate for a given tapered tube and a float, is suggested and the effect of viscosity of a working fluid on the performance of this flow meter is investigated.
